Pigtailed Laser Mount Chapter 3: Description
Rev C, September 5, 2018 Page 3
Description
Designed for Thorlabs' Ø5.6 mm (TO-56) and Ø9 mm (TO-9) Pigtailed
Laser Diodes, Single Mode, Polarization Maintaining, or Multimode
TEC Element Prolongs LD Life and Stabilizes Output Power and
Wavelength
Clamshell Design Eliminates Thermal Gradients Across Diode
Bias-T Adapter for RF Modulation of Laser Current >200 kHz
Thorlabs' LDM9LP is an LD and TEC mount designed for use with all of our 3-
and 4-pin pigtailed diodes
1
. The compact housing protects the pigtail from
physical damage, while also offering excellent thermal characteristics. Two 1/4"
through holes can be used for securing the mount to an optical table with 1/4"-20
or M6 cap screws.
When operating a pigtailed laser diode, temperature control is highly
recommended to stabilize the laser's power and wavelength, while also
prolonging the life of the laser. Typical laser diode mounts rely on contact
between the diode and the mount's cold plate for heat transfer. Pigtailed laser
diodes are often recessed in the pigtail's housing, offering poor contact with the
cold plate of standard laser diode mounts. The LDM9LP, however, is specifically
designed for operating pigtailed laser diodes. Its clamshell design reduces
thermal gradients across the diode, while its cold block cradles the pigtail
housing for excellent contact and heat transfer.
DB9 connections interface with all of Thorlabs' LD Current Controllers and TEC
Controllers. An SMA connector allows access to a Bias-T circuit for RF
modulation of the laser's drive current (200 kHz to >1 GHz). For modulation
below 200 kHz, current should be modulated through the laser diode controller. A
remote interlock jack is provided for the connection of safety devices such as
shutters and warning signs.
1 Due to the variety of fiber pigtailed laser diode packages offered by other companies, this mount is
only designed for use with Thorlabs products. Thorlabs offers a laser diode pigtailing service; please
contact Tech Support for details.
