Santec TSL Series User manual

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TUNABLE LD LIGHT SOURCE
Operation Manual
TSL-210
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TSL-210 OPERATION MANUAL
Notes to Users
1) Copyright 1997 Santec Photonics Laboratories. All rights reserved. No part of this Operation Manual may be
reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the
prior written permission of Santec.
2) Information in this Operation Manual is subject to change without notice.
3) Information of this Operation Manual is prepared with careful examination, however, in the event of any mistake,
please contact us.
Notes in Bringing This Product Out of Japan
1) When this product is brought out of Japan, some laws or regulations of a destination country may prohibit this product
from being used there. In such countries, the use of this product may lead to being punished, but the Company shall not
be responsible for such a case at all, which please note.
2) When this product is exported (or brought out of Japan), if this product is applicable to a strategic material specified in
"Foreign Exchange and Foreign Trade Control Law", then required is an export permit of the Japanese Government
under the law.
santec is a trademark of Santec Photonics Laboratories.
OPELS is a trademark of Santec Photonics Laboratories.
TSL-210 is a trademark of Santec Photonics Laboratories.
Trademarks
OPTICAL HYPER SYSTEM

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TUNABLE LD LIGHT SOURCE TSL-210
Thank you very much for your having purchased our product, Tunable LD Light Source TSL
Series. This Operation Manual contains information necessary for the operation of TSL-210, and
it is intended for those with sufficient knowledge enough to of laser danger and its safe control.
Before operating TSL-210, you should first read thoroughly through this Operation Manual and
become familiar to its contents. After reading this Operation Manual, keep it at your fingertip for
easy reference at any time.
The packing materials and box of this product are needed for long-term storage or
transportation, therefore, keep them even after unpacking this product.
Introduction
NOTE !
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TSL-210 OPERATION MANUAL
NOTE !
Constitution of this Operation Manual and How to Read it
This Operation Manual should be read before operating TSL-210.
This Operation Manual consists of 15 chapters, and the contents of each are as follows :
Chapters 1 through 8 describe the outline of the product, notes on safety,
and installation of the product.
Chapter 9 describes how to operate the product. Before reading
Chapter 9, you should read the descriptions from
Chapter 1 through Chapter 8.
Chapter 10 explains information on the communication function such as to
control TSL-210 from the outside.
Chapters 11 and 12 describe the maintenance and storage methods of this product.
Chapter 13 describes the options.
Chapter 14 describes troubleshooting in operation.
Before using this product, read this Operation Manual first.
This instrument uses a semiconductor laser. Caution-Use of controls or adjustments or
performance of procedures other than those specified herein may result in hazardous
radiation exposure.
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TUNABLE LD LIGHT SOURCE TSL-210
Marking on the instrument
This indicates that caution is required.
Please refer to the operation manual.
This indicates there is a danger due to laser
radiation. Do not look directly at the laser
beam or look at the beam by eye through
any optical instrument.
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TSL-210 OPERATION MANUAL
Explanation of Terms
NOTE
The meanings of the following terms used in this Operation Manual are defined as below :
(1) Meaning
DANGER
WARNING
CAUTION
NOTE
(2) Importance of Information
From the above meanings, the priority of the terms here are
as shown below:
DANGER > WARNING > CAUTION > NOTE
CAUTION
WARNING!
DANGER!!
This indicates pressing DANGER, and if it
is not avoided, personnel death or serious
injury results, therefore, it is the most
emphasized special information.
This indicates potential danger, and if it is
not avoided, personnel death or serious
injury may result, therefore, it is a special
information.
This indicates potential danger, and if it is
not avoided, mild or slight injury may
result, therefore, it is special information.
It also indicates potential danger leading to
only physical damage.
This indicates supplementary explanation of
the text, and thus other information than
DANGER, WARNING, and CAUTION.
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TUNABLE LD LIGHT SOURCE TSL-210
1. Outline of Product 1-1
2. Conguration 2-1
3. Specications 3-1
4. Principle of Operation 4-1
5. Safety Notes and Safety Devices 5-1
6. Installation 6-1
7. Descriptions of Panel Equipment 7-1
7-1 Front Panel 7-1
7-2 Rear Panel 7-5
7-3 Bottom Panel 7-8
8. Functions of This Unit 8-1
8-1 Wide-band Wavelength Tuning TSL-210 8-1
8-2 Coherence Control 8-1
8-3 LD Injection Current, Ambient Temperature Control 8-2
8-4 Optical Output Power Control Function 8-3
8-5 Fine Tuning Function 8-4
Table of Contents
Introduction
Constitution of this Operation Manual and How to Read it
Explanation of Terms
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TSL-210 OPERATION MANUAL
9. Fundamental Operation 9-1
9-1 How to Turn ON 9-1
9-1-A Turning ON / Setting RS-232C Delimiter 9-1
9-1-B Optical Fiber Connection 9-3
9-1-C Cleaning the Optical Connector 9-3
9-1-D Changing LD Current / Changing Unit of Optical Power 9-4
9-2 How to Use Rotary Encoder 9-5
9-3 Setting Wavelength 9-6
9-3-A Minimum digit setting 9-7
9-4 Setting Optical Output Power (APC function) 9-8
9-4-A Setting Optical Output Power (APC function) 9-8
9-4-B ACC Function 9-9
9-4-C Changeover of Optical Output Power Unit 9-10
9-5 Fine Tuning Function 9-10
9-5-A Internal Control 9-11
9-5-B External Control 9-12
9-6 Coherence Control 9-13
9-6-A Variable Coherence Control 9-13
9-7 Low Freauency Modulation 9-14
9-8 Wavelength Calibration 9-15
9-9 Setting GP-IB Address and Delimiter 9-17
9-10 Turning OFF 9-18
9-10-A Turning OFF Injection Current
(LD drive LED lights or Flickers) 9-18
9-10-B Turning the Power OFF 9-19
10. Communication 10-1
10-1 GP-IB 10-1
10-1-A Outline 10-1
10-1-B How to Use 10-1
10-1-C GP-IB Function 10-2
10-1-D GP-IB of TSL-210 10-2
10-1-E GP-IB Connector 10-3
10-2 RS-232C 10-4
10-2-A Outline 10-4
10-2-B How to Use 10-4
10-2-C RS-232C of TSL-210 10-4
10-2-D SIF connector (RS-232C) 10-5
10-2-E Control pad 10-6
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TUNABLE LD LIGHT SOURCE TSL-210
11-1
12-1
13-1
14-1
11. Maintenance
12. Long-term Storage
13. Option
14. Troubleshooting
13-1. High Frequency Modulation Terminal Assignment
13-2. Variable Coherence Control
11-1. Daily Maintenance
11-2. Cleaning the Optical Connector
11-3. Replace the Fuses
10-1
10-4
10-7
10-11
10-110. Communication
• 10-1.GP-IB
10-1-A Outline 10-1
10-1-B How to Use 10-1
10-1-C GP-IB Function 10-2
10-1-D GP-IB of TSL-210 10-2
10-1-E GP-IB Connector 10-3
• 10-2.RS-232C
10-2-A Outline 10-4
10-2-B How to Use 10-4
10-2-C RS-232C of TSL-210 10-4
10-2-D RS-232C Connector 10-5
10-2-E SIF (serial interface) Connector Pin Assignment 10-6
• 10-3.Communication Control
10-3-A Commands 10-7
10-3-B Taking Out Data 10-9
10-3-C Status 10-10
• 10-4.Sample Program
10-4-A RS-232C Sample Program 10-11
10-4-B GP-IB Sample Program 10-12
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TSL-210 OPERATION MANUAL
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TUNABLE LD LIGHT SOURCE TSL-210
1-1
1Outline of Product
The TSL-210 is an external cavity tunable semiconductor laser designed so that the user can
easily tune wavelength and optical output power. With the growth of the telecommunications
industry, there is a need for tunable light sources to evaluate optical components (optical band
pass filter, AWG, fiber grating, etc.), EDFA, and DWDM. Santec designed the TSL-210 to meet
this need with a unit that has precise wavelength tuning accuracy, excellent wavelength and
power stability, and high optical output power. The unit also has many other features including
full control through electronic interface (GPIB, RS-232, LabVIEW), ability to fix a constant
power output across all wavelengths, a coherence control to change linewidth, as well as many
additional optional features. Used as a stand-alone unit or as part of a larger test system, the
TSL-210 is the wise choice for a tunable light source to use in optical research and development,
inspection, and production testing.
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1-2
TSL-210 OPERATION MANUAL
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TUNABLE LD LIGHT SOURCE TSL-210
2-1
mW/dBm
nm mW
dBm
LD COH SHIFT
OPTION ACC
SIF
WAVE LENGTH
POWER LOCAL
OPT.OUT
TUNABLE SEMICONDUCTOR LASER TSL-210
TEMP.ERROR
CURR.LIMIT
WAVE
LENGTH POWER
santec
2Configuration
Test Record 1 copy
TSL-210 Mainframe 1 unit
Power Cord 1 cord
Operation Manual (this document) 1 copy
Power Key 2 units 2P-3P Adapter 1 unit
AIF Exclusive Use Cable 1 cord Power Cord 1 cord
(Japan only)
(Japan, USA, Canada and other countries.)
(Europe only)
Power Cord 1 cord
(U.K. only)
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2-2
TSL-210 OPERATION MANUAL
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TUNABLE LD LIGHT SOURCE TSL-210
3-1
Specications
3
Specication
parameter Unit Min. Spec. Max. Note
Wavelength
Tuning range nm 1530 - 1610
Minimum tuning nm 80 - -
Resolution nm - - 0.01 <0.001nm When using ne tuning
Accuracy nm - - 0.1
Repeatability nm - - 0.05 Number of times of measurement n=50, Measured at center
wavelength
Stability nm - - 0.01 1 hour, Measured at center wavelength
Fine tuning range GHz 10 - - 0.08nm(Typ.)
Tuning speed ms/nm 170 - -
Power
Maximum output power mW
8 - -
6 - - Minimum output power between a certain 40nm
4 - - Minimum output power
Accuracy % - - 5
Repeatability dB - - 0.01 Number of times of measurement n=50, Measured at center
wavelength, +6dBm
Stability dB - - 0.01 1 hour, Measured at center wavelength, +6dBm
Flatness dB - - 0.2 Measured at +6dBm
Environmental condition
Operating temp. range oC 20 - 30
Operating humidity range % - - 80 No condensation
Storage temp. range oC 10 - 40
Storage humidity range % - - 80 No condensation
Recalibration period Year 1 - - Recommended
Spectrum
Spectrum line width MHz - - 1 Coherence control OFF
1 - 500 Coherence control ON
SSR dB 45 - - 50dB(Typ.)
Interface
Optical connector - - FC -
Optical ber - - SMF - SM, 10/125-UV/UV-250
Connector polish - - SPC - Supoer polish connector
GP-IB - - Yes - IEEE-488
RS-232IF - - Yes - Input from SIF interface on the front panel
LF Modulation
Modulation range KHz 0 - 10 Measured at -3dBm
Input level V -1 - 1
Modulation coefcient mA/V - 100 -
Input impedance KΩ- 4.7 -
Modulation input - - AIF - Input from the rear panel
Power supply
Voltage V AC100/120/230/240
Frequency Hz 50/60
Power consumption VA AC100/120:35 AC230/240:55
Max. power consumption W 80 40W(Typ.)
Laser safety class - 3A
Dimensions
Width, Height, Depth mm 210,110,370 Excludes the projection
Weight kg 6
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3-2
TSL-210 OPERATION MANUAL
NOTE
Optiona List
The warranty for TSL-210 is one year. We recommend to have TSL-210 inspected and
calibrated regularly ( once a year recommended).
*1: Output power decreases 20% with optical lter.
*2: Face of ferrule: SS-CS-001A FH(Protrusion): -100~100nm / ROC(Spherical radius): 5~12mm / AA(Polish angle): 7.7~8.3_/ AO(Elleptical
center): ≤50µm / Key error: -0.5~0.5º
parameter Unit Min. Spec. Max. Note
Wavelength
Tuning range nm 1260 - 1640 Maximum tuning range: >80nm (choose from 1260~1640nm)
Power
Maximum output power mW 10 - - High power output
Built in attenuator dB 0 - 20 Resolution 0.04dB(Typ.)
Built in tracking lter nm - - - -3dB bandwidth: 3nm, Resolution 0.24nm(Typ.)*1
Interface
Optical connector - - SC -
Optical ber - - PMF - SLOW axis, Polarization extinction ratio>17dB,Polarization
angle error<10o
Connector polish - - APC - Angled polish connector*2
RF Modulation
Modulation range MHz 1 - 100 Measured at -3dB
input level dBm - - 0
Input impedance Ω- 50 -
Modulation input - - SMA - Input from the rear panel
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TUNABLE LD LIGHT SOURCE TSL-210
4-1
4Principle of Operation
Grating
LD L 2
L 1
•Rotating table
•Direct operating
table*
ISO
L 3
CPU Control • Temperature control
• Current control
• Diffraction grating angle control
• Others
GP-IB
PD
RS-232C
Mirror
SPC Connector
ATT
AIF
SIF
Temperature controlled chamber
FIG.1 Structure diagram of TSL-210
The structure of the TSL-210 is shown in FIG 1. The basic design is a Fabry-Perot type where the
semiconductor laser (LD) has one end Anti-Reflection (AR) coated. Within the LD chamber, the
LD, a lens in cavity and an output lens (to make up the external cavity), while an isolator prevents
light from re-entering the chamber. Temperature control of the chamber is accomplished via a
Peltier device. As shown in FIG 1, the light emitted from the AR coated surface of the LD is
collimated by the lens. The wavelength is then selected by the diffraction grating; the light is then
reflected by mirror back through the diffraction grating where the wavelength is selected again,
and then the wavelength component dissipated at the same angle as the incident angle is
combined from the AR coated surface of the LD by the lens again. With current injected into the
LD, if the return light from the diffraction grating and the gain inside of the LD are sufficient,
laser oscillation will be carried out by the external cavity structure. The use of diffraction grating
as a reflecting mirror to configure the external cavity structure enables oscillation in single
vertical mode; high-precision control of the diffraction grating allows for tuning of the oscillated
wavelength.
The output light from the external cavity semiconductor laser passes through a two-stage isolator
that limits return light due to back-reflection to less than - 60 dB. The output light then passes
through a variable optical attenuator and is input into the optical fiber. To limit the interference
within the fiber caused by end reflections, the end of the fiber is obliquely polished and an SPC-
type output connector is used. (APC is available as an option). The optical power is also
monitored through a separate optical fiber coupler to compensate for wavelength sensitivity.
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TSL-210 OPERATION MANUAL
4-2
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TUNABLE LD LIGHT SOURCE TSL-210
5-1
5Safety Notes and Safety Devices
When the unit is not in operation, be sure to disconnect the power cord.
In the event of any of the following, make sure that the injection current of the LD is zero, turn
OFF the main switch and then disconnect the power cord.
• Spilling liquid into this product
• Rain getting into this product, or excessive humidity
• Cleaning or moving the product
• Damage or scratch found on the cord or plug of this product.
• Dew or other moisture accumulation.
Please follow the following safety guidelines :
• Avoid impact or shock.
• Keep this product away from water.
• Do not disassemble this product.
• Do not place anything on this product.
• Do not block the ventilation hole or impede the operation of the fan in any manner.
• Avoid placing this product under direct sunlight.
• Avoid placing this product in a place subject to noise by electric field, magnetic field, etc.
• Avoid placing this product in a place subject to high temperature and high humidity.
CAUTION
IMPORTANT! Please read the following for your safety and for trouble-free operation.
Protective shutter
Optical output
DANGER!!
This product employs a semiconductor laser. The laser beam may cause damage to
your sense of sight if it comes in contact with your eyes. It is very dangerous.
Therefore, pay sufficient attention to handling it. When not using the unit, be sure to
close the protective shutter (shown in the figure below).
Do not open the instrument case. The laser beam used in this product is harmful to
the eyes. There are no user servicable parts. Please refer all maintenance and repair
to a Santec engineer.
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