Spectra-Physics Pulseo User manual

Pulseo
High Peak Power, Diode Pumped, Q-Switched, 355 nm Laser System
User’s Manual
1335 Terra Bella Avenue
Mountain View, CA 94043
Part Number 90003205, Rev. A
October 2008
This laser product is intended to be sold to a
manufacturer of OEM products for use as a
component (or replacement thereof) in those
products. As such, this product is exempt from
performance standards of United States Code
of Federal Regulations, Title 21, Chapter 1 –
Food and Drug Administration, Department of
Health and Human Services, Subchapter J –
Parts 1040.10 (a), (1) or (2).

iii
Preface
This manual contains information for safely installing, operating and ser-
vicing your Pulseo diode-pumped, Q-switched, ultraviolet laser system.
The system comprises the Pulseo laser head, the Model J200 power supply
and a chiller.
Chapter 1, “Introduction,” is a brief overview of the Pulseo system.
Chapter 2 contains important information regarding laser safety. The Pulseo
is a Class IV laser and, as such, emits laser radiation that can permanently
damage eyes and skin. This section contains information about these haz-
ards and offers suggestions on how to safeguard against them. To minimize
the risk of injury, be sure to read this chapter—then carefully follow these
instructions.
Chapter 3, “Laser Description,” contains a description of the components
used in the Pulseo system. This chapter concludes with system specifica-
tions and outline drawings.
Chapter 4, “Handling Fiber Optics,” provides procedures for the safe han-
dling of the fiber-optic cables that conduct the diode laser pump light to the
laser head. It is crucial to the reliable operation of the system that these pro-
cedures are followed carefully.
Chapter 5, “Controls, Indicators and Connectors,” describes the control
features of the Pulseo system.
Chapter 6, “Installation,” guides you through the installation of the Pulseo
system using the control descriptions found in Chapter 5.
Chapter 7, “Operation,” describes how to control the laser. As an OEM
device, Pulseo is designed to be controlled and monitored by a combina-
tion of analog signals and serial commands provided by a host system.
Chapter 8, “Service and Maintenance,” provides straightforward proce-
dures necessary to keep the Pulseo system properly maintained, and it
includes a replacement parts list. Do not attempt repairs yourself while the
system is still under warranty. Instead, report all problems to Spectra-
Physics for warranty repair. Should you experience any problems with this
system or any equipment purchased from Spectra-Physics, or if you are in
need of technical information or support, contact Spectra-Physics. “Cus-
tomer Service” contains a list of world-wide Spectra-Physics service cen-
ters you can call if you need help.
The appendices of the manual provide specific information.
Appendix A lists the event codes generated by the system as a matter of
routine operation and when a fault is encountered.

Pulseo High Peak Power, Diode Pumped, Q-Switched, 355 nm Laser System
iv
Appendix B provides some introductory information about the principals
of laser physics that underlie the Pulseo design.
This product has been tested and found to conform to the provisions of
Directive 2006/95/EC, the low-voltage directive governing product safety,
and the provisions of EMC Directive 2004/108/EC for electromagnetic
compatibility. Refer to the “CE Declaration of Conformity” statement in
Chapter 2, “Laser Safety,” for a complete list of test specifications.
Every effort has been made to ensure that the information in this manual is
accurate. All information in this document is subject to change without
notice.
Spectra-Physics makes no representation or warranty, either express or
implied, with respect to this document. In no event will Spectra-Physics be
liable for any direct, indirect, special, incidental or consequential damages
resulting from any defects in this documentation.
Finally, if you encounter any difficulty with the content or style of this
manual or encounter problems with the laser itself, please let us know. The
last page of this manual is a form to aid in bringing such issues to our atten-
tion.
Thank you for your purchase of Spectra-Physics instruments.

v
Environmental Specifications
CE Electrical Equipment Requirements
For information regarding the equipment needed to provide the electrical
service listed under “Utility Requirements” in Chapter 6, please refer to
specification EN-309, “Plug, Outlet and Socket Couplers for Industrial
Uses,” listed in the official Journal of the European Communities.
Environmental Specifications
The environmental conditions under which the laser system will function
are listed below:
Indoor use
Altitude: up to 3000 m
Temperatures: 18° C to 35° C
Maximum relative humidity: 85% non-condensing for temperatures up to
31° C.
Mains supply voltage: do not exceed ±10% of the nominal voltage
Insulation category: II
Pollution degree: 2
FCC Regulations
This equipment has been tested and found to comply with the limits for a
Class A digital device pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equip-
ment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference, in which case
the user will be required to correct the interference at his own expense.
Modifications to the laser system not expressly approved by Spectra-Physics
could void your right to operate the equipment.

vii
Table of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Environmental Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
CE Electrical Equipment Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
FCC Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Warning Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Standard Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
Unpacking the Laser System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
Unpacking Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
Packing the Laser System for Return to Spectra-Physics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxv
Accessory Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxvi
Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
The Pulseo Laser Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
The Model J200 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
System Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Environmental Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Patents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Chapter 2: Laser Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Precautions For The Safe Operation of Class IV High Power Lasers . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Safety Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Emission Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Shutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
On/Off Controls and Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Safety Interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Cover Safety Interlocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Maximum Emission Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Requirements for Safely Operating the Pulseo Laser System via a User-Provided Control Device . . 2-7
Waste Electrical and Electronic Equipment Recycling Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Radiation Control Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Safety Warning Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
CE Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Sources for Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Laser Safety Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Equipment and Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Pulseo High Peak Power, Diode Pumped, Q-Switched, 355 nm Laser System
viii
Chapter 3: Laser Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Pulseo Laser Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Laser Cavity Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Q-Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Frequency Doubling and Tripling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Laser Power Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Shutter Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Constant Energy Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Laser Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
The Model J200 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
The FCbar System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
System Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Laser Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Diode Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Outline Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
Chapter 4: Handling the Optical Fibers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Unpacking and Uncoiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
General Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Coiling Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Cleaning and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Equipment and Materials Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Inspection Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Rejection Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Cleaning Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Fiber Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Chapter 5: Controls, Indicators and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
The Pulseo Laser Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Rear Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
The Model J200 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
Control Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
The Shutter Control Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
Mode: Serial Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
Mode: Laser Control Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
Mode: Control by Direct Connection to the Shutter Control Connector . . . . . . . . . . . . . . . . . . . . .5-10
Safety Mode and Process Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-10
Opto-Isolated Connections of the Laser Control Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-11
Opto-Isolated Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-11
Opto-Isolated Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-12

Table of Contents
ix
Chapter 6: Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Utility Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Mounting the Laser Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Installing the Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Connecting the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Connecting the Fiber-Optic Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Laser Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Installing the GUI Control Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Installing the Pulseo USB Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Installing the Pulseo GUI Control Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
Initial Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
The Pulseo GUI Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
Chapter 7: Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Summary of Turn On/Turn Off Using the Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Turn On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Turn Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Common Operating Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Method A: Internal pulse trigger: internal gating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Method B: Internal pulse trigger: external gating via Enable BNC (refer to Case A.1) . . . . . . . . . 7-4
Method C: Internal pulse trigger: external gating via LASER CONTROL . . . . . . . . . . . . . . . . . . . 7-5
Timing Diagrams – Using the external interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Method D: External Pulse Trigger: One Pin Operation, Constant Frequency . . . . . . . . . . . . . . . . 7-7
Method E: External Pulse Trigger: One Pin Operation, Variable Frequency . . . . . . . . . . . . . . . . . 7-7
Method F: External Pulse Trigger: External Gating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
Method G: External Pulse Trigger: Equalizing the First Pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
Method H: External Pulse Trigger: Running Below Efreq for Constant Energy Operation . . . . . . . 7-8
Detailed View of External-Triggering Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
The Serial Command Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
Pinout/Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
Basic Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
Important Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14
Commands Used Less Often . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-17
The LASER CONTROL Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23
Important Notes on Controlling Pulseo Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25
Changing Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25
A Cautionary Note on Changing Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-26
The Diode Laser Current Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-26
Chapter 8: Maintenance and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Maintaining Ultraviolet Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
General Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Optimizing the Harmonic Crystal Temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Translating the THG Crystal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
The Model J200 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Changing the Desiccant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Changing the Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
The Chiller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Service Training Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11

Pulseo High Peak Power, Diode Pumped, Q-Switched, 355 nm Laser System
x
Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-12
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-12
Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-13
Return of the Instrument for Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-13
Service Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-14
Appendix A: Status Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Appendix B: A Brief Review of Laser Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Emission and Absorption of Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1
Population Inversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-2
Resonant Optical Cavity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-4
Nd3+ as a Laser Medium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-5
Diode-Pumped Laser Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-6
Harmonic Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-7
Acousto-Optic Modulation and Q-Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-9
Notes
Report Form for Problems and Solutions
List of Figures
Figure 1: The laser head crate showing the tilt/shock watches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xx
Figure 2: One of four clamps on the power supply crate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xx
Figure 3: The power supply shown with the cover removed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxi
Figure 4: Do not bump the Fibers! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxi
Figure 5: The power supply unpacked. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxii
Figure 6: Clamps shown on Chiller Crate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxii
Figure 7: The chiller shown out of the crate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxiii
Figure 8: Crate showing the spring clamps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxiii
Figure 9: The crate (with the top off) ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxiv
Figure 10: Wrapped Laser Head on the Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxiv
Figure 1-1: The Pulseo Laser Head and Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Figure 2-1: These safety warning labels would be appropriate for use as entry warning signs . . . . . .2-2
Figure 2-2: Folded Metal Beam Target . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Figure 2-3: The Model J200 Safety Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Figure 2-4: The Pulseo Laser Head Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Figure 2-5: The EMISSION Connector Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Figure 2-6: The Model J200 Interlock Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
Figure 2-7: Pulseo Laser Head Radiation Control Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Figure 2-8: Model J200 Radiation Control Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
Figure 2-9: Safety Warning Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10
Figure 3-1: Pulseo Pulse Energy and Pulse Width vs. Repetition Rate . . . . . . . . . . . . . . . . . . . . . . . .3-3
Figure 3-2: Pulseo Average Power and Stability vs. Repetition Rate . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Figure 3-3: Pulseo System Control Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Figure 3-4: Outline Drawing, Pulseo Laser Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
Figure 3-5: Outline Drawing, Model J200 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Figure 3-6: Interlock Safety Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
Figure 4-1: Fiber-Optic Cable Rolling Technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Figure 4-2: Examples of an acceptable and unacceptable fiber output surface. . . . . . . . . . . . . . . . . .4-4
Figure 4-3: Examples of Acceptable Fiber Bundles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Figure 4-4: Examples of Unacceptable Fiber Bundles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Figure 4-5: Fiber Cable Showing Fiber Connector and Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

Table of Contents
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Figure 4-6: Fiber Connection with Slot and Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Figure 5-1: The Pulseo Laser Head Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Figure 5-2: The Pulseo Laser Head Rear Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Figure 5-3: The Front Panel of the Model J200 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Figure 5-4: The Rear Panel of the Model J200 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Figure 5-5: The Model J200 Control Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Figure 5-6: The LASER CONTROL 25-Pin Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Figure 5-7: The SERIAL COM 9-Pin Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Figure 5-8: The Model J200 Emission Connector Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Figure 5-9: The Safety Interlock Jumper Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Figure 5-10: The LASER HEAD 26-pin Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Figure 5-11: The Shutter Control 15-pin Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Figure 5-12: Opto-Isolator Input Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
Figure 6-1: Laser Head Mounting Holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Figure 6-2: The Model J200 Mounting Holes, 3 Each Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Figure 6-3: System Interconnect Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Figure 6-4: The Laser Head Connector Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Figure 6-5: The Power Supply Connector Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Figure 6-6: The input end of the power supply power cord. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Figure 6-7: Water Connect Diagram, Pulseo System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Figure 6-8: Select the “Preinstall” icon in the USB Driver directory on the Pulseo CD-ROM. . . . . . . . 6-10
Figure 6-9: The “Install” Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Figure 6-10: “Installation Successful” Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Figure 6-11: The “Found New Hardware” Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
Figure 6-12: Select “Setup” on the CD-ROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-11
Figure 6-13: The Model J200 Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
Figure 6-14: The Pulseo GUI Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-15
Figure 7-1: Common Internal Triggering Operating Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Figure 7-2: Common External Triggering Operating Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7
Figure 7-3: Detailed View of External-Triggering Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
Figure 7-4: LASER CONTROL 25-Pin Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-23
Figure 8-1: Disconnect cover plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Figure 8-2: Remove the cover plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
Figure 8-3: Disconnect and close the open connections (1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
Figure 8-4: Disconnect and close the open connections (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
Figure 8-5: Slide the particle filter out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
Figure 8-6: Disconnect and close the open connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
Figure 8-7: The empty chamber for the new canister assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8
Figure 8-8: The new canister assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8
Figure 8-9: Error condition - kinked air line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Figure B-1: Electrons occupy distinct orbitals ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Figure B-2: Typical Four-level Transition Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Figure B-3: Frequency Distribution of Longitudinal Modes for a Single Line . . . . . . . . . . . . . . . . . . . . B-4
Figure B-4: Energy Level Scheme for the Nd3+ Ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
Figure B-5: Nd3+ absorption spectra ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6
Figure B-6: Mode Matching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7
Figure B-7: An Intracavity Acousto-Optic Modulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-9
List of Tables
Table 2-1: Fuse Ratings for F1, F2 of the Model J200 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Table 2-2: Maximum Emission Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Table 3-1: Pulseo Performance Specifications, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Table 3-2: Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Pulseo High Peak Power, Diode Pumped, Q-Switched, 355 nm Laser System
xii
Table 3-3: Dimensions and Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Table 3-4: Fuse Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Table 5-1: IBM-PC/AT Serial Port Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Table 5-2: Shutter Control Connector on the Model J200 Power Supply . . . . . . . . . . . . . . . . . . . . . . .5-10
Table 5-3: Opto-Isolator Input Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-12
Table 5-4: Opto-Isolator Output Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-13
Table 7-1: Operating Method Summary, Internal Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
Table 7-2: Operating Method Summary, External Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6
Table 7-3: LASER CONTROL Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-23
Table 8-1: Overall Sequence of THG Crystal Movement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5
Table 8-2: Fuse Ratings for F1, F2 of the Model J200 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . .8-10
Table 8-3: Field Replaceable Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-11
Table A-1: System Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1

xiii
Warning Conventions
The following warnings are used throughout this manual to draw your
attention to situations or procedures that require extra attention. They warn
of hazards to your health, damage to equipment, sensitive procedures, and
exceptional circumstances. All messages are set apart by a thin line above
and below the text as shown here.
Warning!
ESD
Laser radiation is present.
Condition or action may present a hazard to personal safety.
Condition or action may cause damage to equipment.
Condition or action may cause poor performance or error.
Text describes exceptional circumstances or makes a special refer-
ence.
Do not touch.
Appropriate laser safety eyewear should be worn during this opera-
tion.
Danger!
Warning!
Don't
Touch!
Eyewear
Required
Note
Condition or action may present an electrical hazard to personal
safety.
Refer to the manual before operating or using this device.
Action may cause electrostatic discharge and cause damage to equip-
ment.
Danger!
Laser Radiation
Caution!
Danger!

xv
Standard Units
The following units, abbreviations, and prefixes are used in this Spectra-
Physics manual:
Quantity Unit Abbreviation
mass kilogram kg
length meter m
time second s
frequency hertz Hz
force newton N
energy joule J
power watt W
electric current ampere A
electric charge coulomb C
electric potential volt V
resistance ohm Ω
inductance henry H
magnetic flux weber Wb
magnetic flux density tesla T
luminous intensity candela cd
temperature Celsius C
pressure pascal Pa
capacitance farad F
angle radian rad
Prefixes
tera (1012)Tdeci
(10-1)d nano (10-9)n
giga (109)G centi (10-2)cpico
(10-12)p
mega (106)M milli (10-3)mfemto
(10-15)f
kilo (103)kmicro
(10-6)µatto (10-18)a

xvii
Abbreviations
The following is a list of abbreviations used in this manual:
ac alternating current
AOM acousto-optic modulator
AR antireflection
CDRH Center of Devices and Radiological Health
CW continuous wave
dc direct current
fs femtosecond or 10-15 second
HR high reflector
IR infrared
LBO lithium triborate
ns nanosecond or 10-9 second
OC output coupler
ps picosecond or 10-12 second
QSW Q-switch
RF radio frequency
SCFH standard cubic feet per hour
TEM transverse electromagnetic mode
UV ultraviolet
λwavelength

xix
Unpacking and Inspection
Unpacking the Laser System
Your Pulseo laser was packed with great care and its container was
inspected prior to shipment—it left Spectra-Physics in good condition.
Upon receiving your system, immediately inspect the outside of the ship-
ping container. If there is any major damage (holes in the container, crush-
ing, etc.), insist that a representative of the carrier be present when you
unpack the contents.
Keep the shipping materials. If you file a damage claim, you may need
them to demonstrate that the damage occurred as a result of shipping. If
you need to return the system for service at a later date, the specially
designed container assures adequate protection.
The three components of the Pulseo system—the Pulseo laser head, the
Model J200 power supply and the chiller—are shipped in separate crates.
Caution!
The laser has been pack in an air-tight bag. If it is not going to be
installed immediately, leave it in the original shipping crates. Once the
laser has been removed from the original shipping bag, install it within 4
weeks.
Note that the Pulseo laser head weighs 60 lbs (27 kg) and the Model
J200 power supply weighs 95 lb (43 kg). Two people are required to
move each piece safely.
Warning!

Pulseo High Peak Power, Diode Pumped, Q-Switched, 355 nm Laser System
xx
Unpacking Procedure
1. Verify the tilt and shock watches (see Figure 1) on each crate indicate
that the units were safely shipped.
These watches are on the sides of each crate. If the indicator on either
watch shows that the crate has sustained possible damage, follow the
instructions printed on the label, and notify the carrier and your Spectra-
Physics representative.
Figure 1: The laser head crate showing the tilt/shock watches.
2. Open the power supply crate (Figure 2) and remove the power supply.
Figure 2: The Model J200 Power Supply Crate
Tilt Watch
Shock Watch