Newport ILX Lightwave LDM-4405 User manual

User’s Guide
TO-Can Laser Diode Mount
LDM-4405
700415 May 2021

TABLE OF CONTENTS
05_21 LDM-4405 i
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TABLE OF CONTENTS
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
List of Figures and Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Safety and Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Safety Information and the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
General Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Safety Marking Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Comments, Suggestions, and Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Chapter 1 Introduction
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 2 Operation
Mount Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Laser Diode Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Current Sources and Current Measurements . . . . . . . . . . . . . . . . . . . . . . . . . 10

TABLE OF CONTENTS
ii LDM-4405
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Temperature Control and Condensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Thermoelectric Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Nitrogen Purge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 3 Safety

LIST OF FIGURES AND TABLES
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LIST OF FIGURES AND TABLES
Figure 1.1 Exploded View of the LDM-4405 . . . . . . . . . . . . . . . . . . . . 2
Figure 1.2 Rear View of the LDM-4405 . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 1.3 Socket Connection Type I . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 2.1 Pin Arrangement of the LDM-4405 . . . . . . . . . . . . . . . . . . 5
Figure 2.2 Laser Diode Insertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 2.3 Mount with Laser and Cover/Clamp Installed . . . . . . . . . . 9
Figure 2.4 LDM-4405 Laser Cable Pinouts . . . . . . . . . . . . . . . . . . . 10
Figure 2.5 LDM-4405 TE Module Cable Pinouts . . . . . . . . . . . . . . . 11
Table 2.1 00Pinout Combinations and Configurations
of Laser Diodes - LDM-4405 . . . . . . . . . . . . . . . . . . . . . . . 6

LIST OF FIGURES AND TABLES
iv LDM-4405
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LDM-4405 v
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SAFETY AND WARRANTY INFORMATION
The Safety and Warranty Information section provides details about cautionary
symbols used in the manual, safety markings used on the instrument, and
information about the Warranty including Customer Service contact information.
Safety Information and the Manual
Throughout this manual, you will see the words Caution and Warning indicating
potentially dangerous or hazardous situations which, if not avoided, could result in
death, serious or minor injury, or damage to the product. Specifically:
Caution indicates a potentially hazardous situation which can result in minor or
moderate injury or damage to the product or equipment.
Warning indicates a potentially dangerous situation which can result in serious injury or
death.
WARNING
Visible and/or invisible laser radiation. Avoid direct exposure to the beam.
General Safety Considerations
If any of the following conditions exist, or are even suspected, do not use the
system until safe operation can be verified by trained service personnel:
•Visible damage
•Severe transport stress
•Prolonged storage under adverse conditions
•Failure to perform intended measurements or functions
If necessary, contact ILX Lightwave or the authorized local ILX Lightwave
distributor, for information on how the appropriate system components should be
removed and sent back to ILX for servicing. (see the contact information on page
viii).
All components returned to ILX Lightwave are required to have a Return
Authorization Number assigned by an official representative of ILX Lightwave
Corporation. See Claims for Shipping Damage on page vii for more information.

SAFETY SYMBOLS
vi LDM-4405
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SAFETY SYMBOLS
This section describes the safety symbols and classifications.
Technical specifications including electrical ratings and weight are included within
the manual. See the Table of Contents to locate the specifications and other
product information. The following classifications are standard across all ILX
Lightwave products:
•Indoor use only
•Ordinary Protection: This product is NOT protected against the harmful ingress of moisture.
•Class I Equipment (grounded type)
•Mains supply voltage fluctuations are not to exceed ±10% of the nominal supply voltage.
•Pollution Degree II
•Installation (overvoltage) Category II for transient overvoltages
•Maximum Relative Humidity: <80% RH, non-condensing
•Operating temperature range of 0 °C to 28 °C
•Storage and transportation temperature of –40 °C to 70 °C
•Maximum altitude: 3000 m (9843 ft.)
•This equipment is suitable for continuous operation.
Safety Marking Symbols
This section provides a description of the safety marking symbols that appear on
the instrument. These symbols provide information about potentially dangerous
situations which can result in death, injury, or damage to the instrument and other
components.
Caution,
refer to
manual
Earth
ground
Terminal
Alternating
current
Visible and/or
invisible laser
radiation
Caution, risk
of electric
shock
Protective
Conductor
Terminal
Caution, hot
surface
Frame or
chassis
Terminal
On: In position of a bistable push control.
The slash (I) only denotes that mains are on.
Off: Out position of a bistable push control.
The circle (O) only denotes that mains are off.
or
(I)
or
(O)

WARRANTY
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WARRANTY
ILX LIGHTWAVE CORPORATION warrants this instrument to be free from
defects in material and workmanship for a period of one year from date of
shipment. During the warranty period, ILX will repair or replace the unit, at our
option, without charge.
Limitations
This warranty does not apply to fuses, lamps, defects caused by abuse,
modifications, or to use of the product for which it was not intended.
This warranty is in lieu of all other warranties, expressed or implied, including any
implied warranty of merchantability or fitness for any particular purpose. ILX
Lightwave Corporation shall not be liable for any incidental, special, or
consequential damages.
If a problem occurs, please contact ILX Lightwave Corporation with the
instrument's serial number, and thoroughly describe the nature of the problem.
Claims for Shipping Damage
When you receive the system, inspect it immediately for any damage or shortages
on the packing list. If the system is damaged, file a claim with the carrier. The
factory will supply you with a quotation for estimated costs of repair. You must
negotiate and settle with the carrier for the amount of damage.

WARRANTY
viii LDM-4405
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Comments, Suggestions, and Problems
To ensure that you get the most out of your ILX Lightwave product, we ask that
you direct any product operation or service related questions or comments to ILX
Lightwave Customer Support. You may contact us in whatever way is most
convenient:
Phone . . . . . . . . . . . . . . . . . . . . . . . . . . . [phone] or [phone]
Fax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [phone]
On the web at: . . . . . . . . . . . . . . . . . . . . . . www.newport.com/b/ilx-lightwave
Or mail to:
ILX Lightwave Corporation
31950 Frontage Road
Bozeman, Montana, U.S.A 59771
www.newport.com/ilxlightwave
When you contact us, please have the following information:
If ILX Lightwave determines that a return to the factory is necessary, you will
beissued a Return Authorization (RA) number. Please mark this number on the
outside of the shipping box. You or your shipping service are responsible for any
shipping damage when returning the instrument to ILX Lightwave; ILX
recommends you insure the shipment. Be sure to use enough packing material to
prevent shipping damage.
We look forward to serving you even better in the future!
Model Number:
Serial Number:
End-user Name:
Company:
Phone:
Fax:
Description of what is
connected to the ILX
Lightwave instrument:
Description of the problem:

LDM-4405 1
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CHAPTER 1
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INTRODUCTION
This manual describes the LDM-4405 Laser Diode Mount and explains its
operation. Information is also provided to assist in customizing this mount to
satisfy specific laser mounting needs. This chapter provides an overview of the
LDM-4405 Laser Diode Mount, and contains general information and
specifications.
Product Overview
The LDM-4405 is a temperature controlled laser diode mount which allows easy
fixturing for many of today's popular TO-Can laser diodes. It allows for precise
temperature control of the laser package. The mount provides an innovative laser
clamp which allows quick mounting of either 5.6 mm or 9 mm TO-Can lasers. The
mount contains both metric (M4) and English (8-32) threaded steel inserts in its
base for simple and reliable post mounting.
The LDM-4405 allows direct interfacing to most of ILX's current sources and
temperature controllers through standard ILX cables. This gives you the flexibility
to select the proper current source or temperature controller for your particular
application. Additional flexibility is provided by allowing easy reconfiguration of the
mount to match the pin outs found in common laser diode packages.
The LDM-4405 consists of a housing with integrated heat sink, combination cover
and clamp, temperature controlled laser mounting plate, thermoelectric module,
and PCB assembly (see Figure 1.1). The mount includes a banana jack for a wrist
strap or grounding wire, as well as a fitting which allows the user to purge the
laser chamber with nitrogen. The rear of the mount houses connectors for both
current and temperature control cables and two switches for selecting polarity of
the laser diode and photo diode pins.

INTRODUCTION
Product Overview
2 LDM-4405
CHAPTER 1
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Figure 1.1 illustrates the LDM-4405 with cover/clamp removed, revealing the laser
mounting plate and internal PCB. Figure 1.2 shows the rear of the mount,
including connectors and switches.
Figure 1.1 Exploded View of the LDM-4405
Figure 1.2 Rear View of the LDM-4405

INTRODUCTION
Specifications
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CHAPTER 1
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Specifications
1. Minimum achievable temperature depends on laser thermal power. For more information, refer to ILX Technical Note “Temperature
Control Range of the LDM-4405”.
Figure 1.3 Socket Connection Type I
Our goal is to make the best laser diode instrumentation available anywhere. To
achieve this, we need your ideas and comments on ways we can improve out
products. We invite you to contact us at any time with your suggestions.
Laser Packages
Styles Supported 5.6 mm and 9 mm TO-can, Type 1
Lead Length 5-20mm
Maximum Laser Current 500 mA
Input Connectors
Current Source 9-pin D-Sub, female
Temperature Controller 9-pin D-Sub, male
Nitrogen Purge Brass barbed fitting for 1/16” ID tubing
Ground Banana jack, female
Temperature Control
Range110-85oC
Sensor Type Calibrated 10kthermistor
TE Module Ratings
000Imax 3.9A
000Vmax 3.7V
General
Size (HxWxD) [in(mm)] 2.3 (57.2) x 2.0 (50.8) x 1.6 (40.6)
Weight 0.30 lb (136g)
Regulatory Compliance RoHS

INTRODUCTION
Specifications
4 LDM-4405
CHAPTER 1
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LDM-4405 5
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CHAPTER 2
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OPERATION
This chapter describes the electrical connection and mounting of laser diodes.
Configuration options for the LDM-4405 for different device pin outs are also
discussed.
Mount Configuration
The LDM-4405 mount is designed for Type 1 TO-can laser diodes containing a
laser diode pin, a photodiode pin, and a center common pin. Figure 2.1 shows the
pin arrangement on the mount. The laser diode pin can be configured to be either
anode or cathode. Likewise, the photo diode pin can be configured to be either
anode or cathode. Refer to the datasheet for your laser to determine the polarity
of the laser diode and photo diode pins. The rear of the mount contains two
switches, one for selecting laser diode polarity and the other for photo diode
polarity. Each switch is labeled LD (laser diode) or PD (photo diode) and has 2
positions: + (anode) and - (cathode). The position of the switch selects the
polarity of the pin. Table 2.1 shows the four different pinout combinations and the
corresponding switch positions.
Figure 2.1 Pin Arrangement of the LDM-4405

OPERATION
Mount Configuration
6 LDM-4405
CHAPTER 2
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Table 2.1 Pinout Combinations and Configurations of Laser Diodes - LDM-4405
For example, if the laser diode pin on your device is cathode (-) and the photo
diode pin is anode (+), you would select the "-" position on the LD switch and the
"+" position on the PD switch. This corresponds to the configuration shown in
Table 2.1 where the laser diode anode and photo diode cathode are tied together
at the common pin.
It is imperative that the LDM-4405 is properly configured for your specific laser. If the
previous information does not specify clearly the switch settings that are required for
your laser, do not operate the laser. Call Customer Service at ILX Lightwave for further
information and instructions. When calling, please have all pertinent laser data available
for reference.

OPERATION
Laser Diode Mounting
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CHAPTER 2
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Laser Diode Mounting
Laser diodes are extremely susceptible to damage caused by electrostatic discharge and
surge currents. To avoid early failure or damage to the device, workers and work
benches must be grounded at all times when handling or working with laser diodes.
The LDM-4405 mount is equipped with a grounding jack on the rear, which is
electrically connected to the mount chassis. We strongly recommend that you
electrically ground yourself with a wrist strap so that you are assured of being at
the same potential as the mount chassis.
Prior to inserting the laser, connect the current source and temperature controllers
to the mount using the appropriate cables (refer to Figures 2.4 and 2.5 for laser
and temperature connector pin outs). When the mount electrical connections and
laser driver are correctly configured, the laser cathode and anode connections are
shorted through an ILX Lightwave current source when the current drive is
switched off. This prevents damage to the laser from electrostatic discharge and
supports other laser safety features of all ILX Lightwave laser diode drivers.
The LDM-4405 features a 4 pin device test socket that accommodates leads up to
20 mm in length. To install the laser, first remove the cover/clamp by loosening to
the two flat head captive screws. Align the laser diode pin of the laser with the
receptacle labeled LD and the photo diode pin with the receptacle labeled PD.
The common pin should align with one of the two receptacles labeled COM.
Gently and evenly push the device pins into the receptacles until the laser
package is flush with the laser mounting plate. Figure 2.2 shows correct insertion
of a laser diode into the mount.

OPERATION
Laser Diode Mounting
8 LDM-4405
CHAPTER 2
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Figure 2.2 Laser Diode Insertion
The one-piece cover/clamp accommodates both 5.6 mm and 9 mm TO-can
devices. The clamp uses an O-ring to apply preload onto the device for good
thermal connection to the laser mounting plate. There are two receptacles on the
clamp, a smaller diameter one for 5.6mm devices and a larger diameter one for
9mm devices. Rotate the cover/clamp so that the correct receptacle aligns with
the device. Secure the cover/clamp using the two flat head captive screws.
Tighten until the cover/clamp is flush with the body of the mount. Figure 2.3
displays the mount with a laser and cover/clamp correctly installed. The laser is
now ready to test.

OPERATION
Laser Diode Mounting
05_21 LDM-4405 9
CHAPTER 2
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Figure 2.3 Mount with Laser and Cover/Clamp Installed

OPERATION
Current Sources and Current Measurements
10 LDM-4405
CHAPTER 2
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Current Sources and Current Measurements
Operate the LDM-4405 Laser Diode Mount using an appropriate ILX Lightwave
current source and temperature controller. Operation with other current sources or
temperature controllers is also possible, provided that the correct wiring is
observed (refer to Figures 2.4 and 2.5). If an ILX Lightwave current source is used
with the system interlock feature, the interlock connections are available at pins 1
and 2 of the current source connector (see Figure 2.4). With the ILX Lightwave
interlock feature enabled, the interlock pins must be connected before current can
flow from the source.
Proper shielding of the current source and temperature controller signals is
necessary to ensure proper noise-free performance. This is accomplished by
grounding the shield on the interconnect cables to the controller and not to the
mount. The CC-505S Temperature Control Cable provides this shielding
automatically by connecting the 15 pin housing into the temperature controller.
The CC-305S Current Source Cable, being symmetrical, must be oriented
correctly to ensure proper grounding of the shield. This is done by connecting the
serial-number end of the cable to the current source. The current source will still
drive the laser normally with the cable reversed, but the noise performance will be
degraded. If noise becomes excessive during testing, check the orientation of
your laser cable.
Figure 2.4 LDM-4405 Laser Cable Pinouts