THORLABS LDM9LP Manuale utente
LDM9LP
Pigtailed Laser Mount
Operating Manual
Pigtailed Laser Mount
Table of Contents
Warning Symbol Definitions ...........................................1
Safety.................................................................................2
Description........................................................................ 3
Setup.................................................................................. 5
4.1.General..........................................................................5
4.2.SpecialNotefor4‐pinLaserDiodes..............................10
4.3.SpecialNoteforLaserDiodeswithoutaMonitor
Photodiode..................................................................11
4.4.LaserDiodeCurrentControllerConnection...................11
4.5.UsingaThird‐PartyLaserController.............................12
4.6.TECControllerConnection............................................13
4.7.TECLockoutandGroundJumpers................................14
Operation.........................................................................15
5.1.General........................................................................15
5.2.RFModulation.............................................................15
5.3.StatusandInterlocks...................................................16
5.4.MaintainingtheLDM9LP.............................................16
Making Safety Interlock Connections .......................... 17
Troubleshooting .............................................................18
Specifications .................................................................19
8.1.RFModulationCharts..................................................20
8.2.ThermistorData..........................................................22
Mechanical Drawing.......................................................23
Regulatory.......................................................................24
Thorlabs Worldwide Contacts.......................................25
Pigtailed Laser Mount Chapter 1: Warning Symbol Definitions
Rev C, September 5, 2018 Page 1
Warning Symbol Definitions
Below is a list of warning symbols you may encounter in this manual or on your
device.
Symbol Description
Direct Current
Alternating Current
Both Direct and Alternating Current
Earth Ground Terminal
Protective Conductor Terminal
Frame or Chassis Terminal
Equipotentiality
On (Supply)
Off (Supply)
In Position of a Bi-Stable Push Control
Out Position of a Bi-Stable Push Control
Caution: Risk of Electric Shock
Caution: Hot Surface
Caution: Risk of Danger
Warning: Laser Radiation
Caution: Spinning Blades May Cause Harm
Pigtailed Laser Mount Chapter 2: Safety
Page 2 TTN027954-D02
Safety
WARNING
This unit must not be operated in explosive
environments
WARNING
Avoid Exposure – Laser Radiation Emitted from
apertures
WARNING
Observe ESD Handling Precautions
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.
Pigtailed Laser Mount Chapter 3: Description
Page 4 TTN027954-D02
LDM9LP Contents:
Pigtail Mount
1.5mm Hex Key
Operating Manual
Supported Pin Style
Style A
Case
LD PD LD PD LD PD
LD PD
Case Case
Case
Style B Style C
Style D
LD
Case
Style E
LD
Case
Style H
Supported Pin Configurations
LD
Case
Style G
Pigtailed Laser Mount Chapter 4: Setup
Rev C, September 5, 2018 Page 5
Setup
4.1. General
1. Remove the two M2 screws, from the protection cover and remove the
cover.
2. Remove the four M2 screws, that fix the upper cooler shell, and remove the
upper shell.
3. Remove the two M2 screws fixing the laser mounting plate to the cooler and
pull out the plate from the connector.
Pigtailed Laser Mount Chapter 4: Setup
Page 6 TTN027954-D02
4. Determine the laser pin config-uration from the laser diode data sheets and
install the Laser Diode into the socket as shown, according to the corresponding
Pin Code. Refer to Figure 4 on page 9.
5. The STYLE jumper on the back of the laser mounting PCB should be placed
according to the particular LD pin configuration being used. For pin codes A, B,
C, D, E, or H, set the STYLE jumper to the lower two pins. For pin code G, set
the jumper to the upper two pins.
6. The BYPASS jumper should be set only if the laser is modulated via the LD
DRIVER input on the LDM9LP. Please refer to the table below.
Operation Mode Bypass Jumper
Low noise, no modulation No (Removed)
RF Modulation via RF IN (BIAS-T) No (Removed)
Modulation via LD DRIVER input2Yes (Set)
2
If the LD driver being used has a noise reduction filter feature, the jumper may need to be removed to
ensure good performance.
Pigtailed Laser Mount Chapter 4: Setup
Rev C, September 5, 2018 Page 7
7. Based on the pin configuration used, set the LD and PD switches on the side of
the LDM9LP according to the diagram below.
Polarity Switch Settings
Style A
Case
LD PD
LD PD
LD PD
LD
Case
Case
Case
Style B
LD PD
Case
Style C
LD
Case
Style G
Style D
Style E
LD
Case
Style H
LD
LD
LD
PD
LD
LD
AG
CG AGCG AG
CG AG
CG
AG
CG AG
CG
AG
CG AG
CG
AG
CG AGCG
AG
CG AGCG
LD
PD
PD
PD
PD
N/A
PD
N/A
Switch Position
(Black Square)
LD
AG
CG AG
CG
PD
N/A
Pigtailed Laser Mount Chapter 4: Setup
Page 8 TTN027954-D02
8. Thread the two M2 socket head screws into the pigtail flange, securing it to
the mounting flange. Next, replace the upper cooler shell and tighten the
four M2 socket head screws. Lastly, reattach the protective cover using two
M2 socket head screws.
Laser Diode Socket
Indice
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