Pigtailed Laser Mount
Chapter 4: Setup
Rev C, September 5, 2018
Page 11
4.3. Special Note for Laser Diodes without a Monitor
Photodiode
Laser diodes without a monitor photodiode will also work with the LDM9LP. The
laser diode pins must be positioned between the LD and G positions. Some 2 pin
packages will not align with the laser diode socket, but 3 pin versions can be
mounted similar to typical laser diodes with photodiodes.
4.4. Laser Diode Current Controller Connection
Using the Thorlabs LDC/ITC Series Laser Controllers:
The LDM9LP is compatible with all Thorlabs LDC LD controllers and
ITC series combination controllers (LD and TEC). Appropriate cables
with DB9 connectors are included with Thorlabs controllers and ensure
that the controllers cannot be connected incorrectly. Additionally, these
controllers have built-in protection circuitry that protects the laser when
not in use.
The nomenclature for the Laser Diode polarity switch on the LDC40xx
and ITC40xx drivers and the LDM9LP are consistent with each other.
For example, if the laser polarity on the driver is set to “AG” (anode
grounded), then the LD polarity switch on the LDM9LP should also be
set to AG, and so on.
The nomenclature for the Photo Diode polarity switch on the
LDC40xx/80xx and ITC series drivers and the LDM9LP is as follows:
The photodiode polarity switch on the LDM9LP must always be set to
“CG”. The photodiode polarity should be set with the internal Laser
controller switch only. For more information on how to set Polarity
settings on the Laser controller, please refer to the appropriate Laser
Controller manual.
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