OsTech Laser Lab Source LDX Series User manual

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Laser Lab Source
a division of Research Lab Source Corporation
www.LaserLabSource.com
phone: [phone]
670 South Ferguson
Bozeman, MT 59718
PRODUCT MANUAL
LDX-976nm-45W

Overview
The LDX-Series Laser Diode Sources are high quality fiber-coupled laser diode
sources based on a robust and reliable laser diode and temperature controller
architecture, with a focus on precision, reliability, and laser safety. All LDX systems
include the controller, temperature controlled mount, and a carefully selected fiber-
coupled laser diode from a top global manufacturer.
Before the system is shipped, the laser diode is integrated into the system, the
safe-oprating limits are programmed, and the entire system is tested and calibrated.
Different system forms are available:
vBenchtop discrete systems based on individual controller and mounting units,
featuring front-panel and remote control ability (RS232 / optional USB)
vCompact OEM solutions, with RS232 interface and no front panel
vRack-mounted systems with a fully enclosed fiber-coupled laser diode
module, front panel control, and RS232 interface
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 unit passes a burn-in inspection, a full functional test and a final
calibration prior to shipment.
General Features
•ull digital control, standard interface RS232 or USB
•on volatile pre-configuration EEPROM
•Controllable internal and external fan supplies
•ardware interloc
•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
•nternal and external modulation functions
3

TEC Controller Features
•Thermosensor input for TCs standard 10 , PT100, PT1000 or others
•Polynomial and Steinhart-art sensor model
•PD temperature controller for TEC coolers
•Voltage, current and temperature limits
•Target temperature seuencer on reuest
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3
5
7
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
16
4 Hardware setup preparations
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
6

 ntrutin
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.
t 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.
n ae  uetin r prle pleae ntat aer a
ure in rt eria r ur erie ta at Oe in
urpe
  L L   LD
contactlaserlabsource.com 800-8-0
I OsTech, Berlin ermany
Tel. 4 30 23040 contactostech.de
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
    LL DL
input voltage DS01: 24 V DC ±10%
DS11: 110–220 VAC
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
   L D   
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
8

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 NPEFMTQFDJGJD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
•nterloc open
•nternal supply failure
•Abnormal transients
•Open circuit  no laser connected
•nternal overtemperature
•Beyond max. power dissipation
9

 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
10

3. Keypad and Display Menus
For OEM-Type Models, this section does not apply.
 
UP •increases the digit under the cursor
DOWN •decreases the digit under the cursor
LEFT •moves to the previous input field, unsaved changes are discarded
RIGHT •moves to the next input field, unsaved changes are discarded
OK or Enter •triggers actions
•toggles checkboxes
•saves a changed value
•
moves the cursor position if pressed on an unchanged or already
saved value
 D 
After power-on, the main menu is shown on the display. Some fields can be used
to
change settings of the device, others only show the current values. ou can
switch to the next menu with the arrow in the upper right corner. The laser menu
is next.
Then follow the TEC menus. The last menu is the device menu for general
settings.
  
The main menu gives an overview over the current state and allows you to
control
basic settings. The layout of the main menu depends on the model. t is
shown in figure 3 .1. The large number show the present laser current in
laser
drivers and the current temperature in TEC controllers. The following fields
may be
available in the main menu:
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