OsTech Laser Lab Source LDI Series User manual

Operating Manual
LDI, LDC and TEC
Series Laser Diode Drivers
and TEC Controllers

Overview
The LDC and TEC series laser diode drivers and TEC controllers are designed to precisely
and reliably drive diode lasers and Peltier cooler elements. They are available as bench-
top units and as OEM units. All devices have an integrated QCW pulse generator and can
be run from QCW pulsed to CW mode. External digital and analog modulation functionality
is also included on all models. The standard RS232 interface can be used for
configuration, operation and moni toring. A USB interface is optionally available on all
models. Every LDC and TEC unit passes a burn-in inspection, a full functional test and a
final calibration prior to shipment.
General Features
•Full digital control, standard interface RS232 or USB
•Non volatile pre-configuration (EEPROM)
•Controllable internal and external fan supplies
•Hardware interlock
•Over-temperature and over-current protection
•Precise current controlled CW and pulsed laser operation modes
•Low power dissipation by active voltage control in CW mode
•Multiple laser diode safety features
•Internal and external modulation functions
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TEC Controller Features
•Thermosensor input for NTCs (standard 10 kΩ), PT100, PT1000 or others
•Polynomial and Steinhart-Hart sensor model
•PID temperature controller for TEC coolers
•Voltage, current and temperature limits
•Target temperature sequencer on request
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Contents
Overview
Contents
1 Introduction
2 Technical parameters 8
2.1 General parameters .............................. 8
2.2 Laser module ................................. 8
2.2.1 Security breakdown conditions ................... 9
2.3 Peltier module ................................. 10
3 Keypad and display menus 11
3.1 Keypad ..................................... 11
3.2 Display Menus ................................ 11
3.2.1 Main Menu .............................. 11
3.2.2 Laser Menu .............................. 12
3.2.3 TEC Menu ............................... 13
3.2.4 Device Menu ............................. 14
4 Hardware setup preparations 16
5 Laser control 17
5.1 Preparations .................................. 17
5.2 CW mode ................................... 17
5.2.1 Switching on the laser ........................ 17
5.2.2 Ramp on laser switching ...................... 18
5.2.3 Power control mode ......................... 18
5.3 Gate option .................................. 19
5.4 Modulation modes .............................. 19
5.4.1 Internal digital modulation mode ................. 20
5.4.2 External digital modulation ..................... 21
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Contents
5.4.3 External analog modulation ..................... 21
5.5 Pilot laser control ............................... 22
6 Temperature controller and sensors 23
6.1 PID controller parameters .......................... 23
6.2 Temperature sensor .............................. 24
7 Remote control 27
7.1 Standard mode ................................ 27
7.2 Reduced mode ................................ 27
7.3 Binary mode .................................. 28
7.4 Software .................................... 28
8 Error codes 29
9 Command reference 30
9.1 Laser commands (L)............................. 30
9.1.1 Laser current commands (LC).................... 30
9.1.2 Laser voltage commands (LV).................... 30
9.1.3 Laser photo current (LPC) and power (LP) commands ...... 30
9.1.4 Laser modulation commands (LM)................. 31
9.1.5 Laser sequencer commands (LZ).................. 31
9.1.6 Pilot laser commands (P)...................... 31
9.2 Temperature sensor and TEC commands (xT).............. 31
9.2.1 Temperature sensor commands ................... 32
9.2.2 TEC commands ............................ 32
9.3 General commands .............................. 32
9.3.1 Status command ........................... 33
9.3.2 Mode commands ........................... 33
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1.Introduction
The LDC series precision laser diode drivers offer the user full control of all
configuration parameters through a front panel and/or through a serial interface. It is
important to read this manual thoroughly before turning on the device for the first
time. The operating instructions should be followed for safe operation and optimum
performance of the laser diode.
In case of questions or problems, please contact Laser Lab
Source in North America or our service staff at OsTech in
Europe.
North America: Laser Lab Source / LaserDiodeControl.com
[email protected] 800-877-5065
International: OsTech, Berlin Germany
Tel. [phone] [email protected]
Please note that unauthorized opening of the device cancels the two year
warranty. Don’t break the calibration seal!
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2.Technical Parameters
2.1 General Parameters FOR ALL MODELS
input voltage DS01: 24 V DC ±10%
DS11: 110–220 V AC
ambient temperature 0. . . 40 ◦C
humidity <95%
housing size width×height×depth (depth without connectors)
o44 housing 105 mm ×44 mm ×160 mm
(4.1 in ×1.7 in ×6.3 in)
o85 housing 105 mm ×85 mm ×160 mm
(4.1 in ×3.3 in ×6.3 in)
t85 housing 105 mm ×85 mm ×200 mm
(4.1 in ×3.3 in ×7.9 in)
t95 housing 119 mm ×95 mm ×235 mm
(4.7 in ×3.7 in ×9.3 in)
t127 housing 200 mm ×127 mm ×277 mm
(7.9 in ×5.0 in ×10.9 in)
t192 housing
(19 inch, 2 HU)
483 mm ×89 mm ×266 mm
(19 in ×3.5 in ×10.5 in)
t193 housing
(19 inch, 3 HU)
483 mm ×133 mm ×266 mm
(19 in ×5.25 in ×10.5 in)
remote control PC serial interface RS232
2.2 (Model Specific) Laser Diode Current and Voltage
laser diode current range 1.5 |2.5 |5|8|12 |16 |24 |32 |40 . . . 100 A
resolution Imax/4000
accuracy ±0.5 %
laser current limit range 0. . . Imax
resolution Imax /4000
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accuracy ±2 %
laser diode voltage min. 1.2 V
max. 3|6|9|12 |15 |18 |24 |48 V
current noise 1 % . . . 0.01 % of Imax rms
internal pulse mode
pulse width range (model specific) 10 µs . . . 232 µs (71 min)
pulse period range (pulse width +100 µs). . . 232 µs (71 min)
time base accuracy ±1 %
pulse to pulse accuracy 30 µs
rise time at 2.5 A
Imax
<2µs
at 4 A Imax <3µs
at 8 A Imax <10 µs
at 12 A Imax <15 µs
at 16 A Imax <18 µs
>16 A Imax 25–40 µs
on request <1µs. . . 3µs
fall time 70 % . . . 100 % of Trise
laser fan control
voltage range 1.2 V . . . 24 V (adjustable by software)
current max. 300 mA
2.2.1 Security Shut-Down Conditions
•Interlock open
•Internal supply failure
•Abnormal transients
•Open circuit / no laser connected
•Internal overtemperature
•Beyond max. power dissipation
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2.3 (Model Specific) TEC Controller
peltier current range ±1.5 | ± 2.5 | ± 4| ± 8| ± 10 | ± 12 | ± 16 A
accuracy ±Imax/4000
peltier voltage max. 4|8|14 |18 |24 |48 V
temperature controller range −25 ◦C. . . 150 ◦C, larger on request
accuracy typical: <10 mK
max.: <100 mK
temperature limits range −25 ◦C. . . 150 ◦C
default lower limit 5 ◦C
default upper limit 35 ◦C
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