Pigtailed Laser Mount
Chapter 5: Operation
Page 16
TTN027954-D02
5.3. Status and Interlocks
This unit is equipped with two interlock circuits and an LED that indicates if the
laser diode is enabled. All three circuits are designed to interface with Thorlabs’
laser and TEC controllers with no external circuitry.
If third-party controllers are used to drive the laser diode or TEC
elements, then only the LD on indicator can be used. To prevent
damage to the Status and Interlock circuits, the following external
connections should be followed:
Install the shorting device into the REMOTE INTRLK connector that was
shipped with the LDM9LP.
Install the TEC LOCKOUT bypass jumper into JMP1 inside the LDM9LP
case (see 4.7).
Connect a resistor to LD Interface DB9 Pin 1 appropriately sized to limit
the current into Pin 1 to between 5 and 10 mA.
The “driver” side of this resistor should be connected to a DC signal
that, when high, indicates that the laser diode is being driven (driver
dependent).
If you have any questions regarding these connections, please feel free
to contact an engineer at Thorlabs for clarification.
If you wish to make full use of all of the Status and Interlock features with your
third-party drivers, please contact Thorlabs and an engineer will help you
determine if this is possible and how to implement these features.
5.4. Maintaining the LDM9LP
There are no serviceable parts in the LDM9LP. The housing may be cleaned by
wiping with a soft, damp cloth. If you suspect a problem with your LDM9LP,
please call Thorlabs and an engineer will be happy to assist you.
