THORLABS LM14S2, Руководство пользователя

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Butterfly Laser Diode Mount Chapter 4: Setup
Rev E, May 8, 2018 Page 7
4.3. Using the TEC / Laser Lockout Feature
The TEC / Laser Lockout feature provides an added level of protection for your butterfly laser diode. By
monitoring a status signal from the TEC controller, the laser driver can only be enabled if the TEC controller is
also enabled. This feature is activated by setting the TEC LOCK switch located on the bottom of the unit to the
proper position. Set this to “Active” to use this feature, or to “Bypass” to disable the feature. Designed for direct
compatibility with the Thorlabs LDC and TEC controllers, no additional wiring is required when used in conjunction
with these drivers.
4.4. Operating the Butterfly Laser Diode
Once the butterfly laser diode is properly mounted in the LM14S2, set the operating temperature using the TEC
controller. Once the set temperature has been reached, enable the laser diode, set the drive current or power
level, and control as you normally would.
4.5. Laser Controller Connection
4.5.1. Using the Thorlabs LDC Series Laser Controllers
The LM14S2 is best used with the Thorlabs LDC Series Laser Controllers. The LDC series drivers are shipped
with a mating DB9 cable that plugs directly into the controller and laser head. Using the cable supplied with the
LDC, the controller cannot be connected incorrectly. Also, the LDC has built-in protection circuitry that protects
the laser when not in use. Simply connect the DB9 cable included with the LDC to the laser mount and to the
controller.
4.5.2. Using a Third-Party Laser Controller
When using a third-party controller, a custom cable will have to be made to properly interface to the laser mount.
Please refer to Table 1 for laser connections.
Table 1 Laser Diode Connector Pin Functions
Pin Signal Description
1
Interlock and
Status Pin
(LDC Specific)
This pin is the input to the LD Status Indicator and Interlock Circuits. When using
Thorlabs LDCs, no external circuitry is required. To use these features with third-
party controllers please refer Section 5.2 of this manual.
5
Interlock and
Status Return
This pin is the return side of the Status and Interlock circuitry.
7
Laser Diode
Cathode
LDC
Use this pin for the laser diode cathode connection. This pin must always be driven
more negative than Pin 3 (laser anode), otherwise a reverse bias protection diode
will clamp this pin to Pin 3.
8 - Not Used
3
Laser Diode
Anode
LDA
Use this pin for the laser diode anode connection. This pin must always be driven
more positive than Pin 7 (laser cathode), otherwise a reverse bias protection diode
will clamp this pin to Pin 7.
2
Photodiode
Cathode
PDC
Use this pin to connect to the integral monitor photodiode cathode of your laser
diode.
4
Photodiode
Anode
PDA
Use this pin to connect to the integral monitor photodiode anode of your laser diode.
6
Laser Diode
Voltage (-)
VLD(-)
This pin can be used to measure the voltage at the laser diode cathode. There is a
499 Ω resistor between this pin and the LD cathode.
9
Laser Diode
Voltage (+)
VLD(+)
This pin can be used to measure the voltage at the laser diode anode. There is a
499 Ω resistor between this pin and the LD anode.