background image

Butterfly Laser Diode Mount

 

Chapter 7: Troubleshooting

 

Page 12

 

10614-D02 

Chapter 7 

Troubleshooting 

Laser Driver Will Not Enable 

If you are using Thorlabs Laser and TEC controllers with your LM14S2: 

Possible Solution 

Directions 

Remote interlock is open 

Make sure that either the shorting device is installed in the REMOTE INTRLK 
connector on the side of the LM14S2. If you have a remote interlock switch 
connected to this REMOTE INTRLK connector, it must be in a closed position. 

TEC element is not active 

The internal TEC Lockout is preventing the laser diode form operating. Make sure 
the TEC control is active. 

 

Laser Wavelength or Power is Unstable Even Though the TEC Controller Shows Stable Temperature 

Possible Solution

 

Directions

 

LD is not fully seated 

Make sure your laser diode is fully inserted into the LM14S2 laser mount and its 
body is in full contact with the heat sink base, and the four securing screws are 
tightened. 

 

The LDC Series Laser Driver Indicates an “Open Circuit” Alarm When You Try to Enable the Laser 

Possible Solution

 

Directions

 

 
LD polarity switch may be 
incorrect on the driver

 

In most cases your butterfly laser will operate with an anode grounded polarity. 
Therefore, set the LD polarity switch on the back of your LDC series driver to AG. 

 

My Laser Diode Does Not Turn On at All 

Possible Solution

 

Directions

 

 
The configuration card 
may be installed 
incorrectly

 

Make sure you have the correct configuration card installed and that it is seated in 
the 24-pin hearder properly. This is easily checked by turning the unit over and 
reading the card type in the adapter inspection window (see Figure 1) 

 

Содержание LM14S2

Страница 1: ...LM14S2 Butterfly Laser Diode Mount User Guide...

Страница 2: ...ser Controllers 7 4 5 2 Using a Third Party Laser Controller 7 4 6 TEC Controller Connection 8 4 6 1 Using the Thorlabs TED200C Controller 8 4 6 2 Using a Third Party TEC Controller 8 4 7 Grounding 8...

Страница 3: ...n your device Symbol Description Direct Current Alternating Current Both Direct and Alternating Current Earth Ground Terminal Protective Conductor Terminal Frame or Chassis Terminal Equipotentiality O...

Страница 4: ...Butterfly Laser Diode Mount Chapter 2 Safety Page 2 10614 D02 Chapter 2 Safety WARNING Always observe proper laser safety when operating this unit...

Страница 5: ...in butterfly packages A Bias T adapter is also included allowing the laser to be directly modulated up to 500 MHz This adapter is intended for use only with butterfly lasers that have integrated RF mo...

Страница 6: ...4 Replace the bottom cover to the unit and secure it with the four 4 40 screws previously removed The cover must be oriented to allow the TEC LOCK switch to pass through it When installed properly the...

Страница 7: ...ion Card can be used to route the DB9 input signals to the mounted laser diode Refer to Section 4 2 1 for specifics on which side of the configuration card to use For non standard devices that do not...

Страница 8: ...ump Laser Diode View shows alternate locations for monitor and laser diodes Figure 4 Type 2 Telcom Laser Diode Figure 5 Type 2 Laser with Integrated Bias T 9 8 11 10 12 14 13 CASE TEC LASER DIODE THER...

Страница 9: ...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 l...

Страница 10: ...it will simply disconnect it from the cable shield In fact when using a driver that does have a grounded anode connection it may be beneficial to remove JMP1 to prevent a ground loop from forming JMP...

Страница 11: ...described in Step 7 of Section 4 1 Do not clamp the right side ZIF socket 2 Remove the two black cap head screws on the right side ZIF socket The socket will stay in place as it is soldered to the mai...

Страница 12: ...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...

Страница 13: ...g device installed and the unit will operate normally as described in the procedures in this manual If you wish to make use of the interlock feature you will need to acquire the appropriate connector...

Страница 14: ...ble Solution Directions LD is not fully seated Make sure your laser diode is fully inserted into the LM14S2 laser mount and its body is in full contact with the heat sink base and the four securing sc...

Страница 15: ...500 MHz RF Input Connection SMA RF Input Impedance 25 On Bias T Adapter Maximum RF Power 200 mW or Limit of Laser Diode Laser Polarity Anode Grounded See Section 4 7 TEC Specifications Maximum TEC Cur...

Страница 16: ...Butterfly Laser Diode Mount Chapter 9 Mechanical Drawing Page 14 10614 D02 Chapter 9 Mechanical Drawing...

Страница 17: ...M14S2 2 Pin 12 is identified by two adjacent pads with a narrow slit between them see Figure 9 to the right 3 If you have a Revision A Type 1 Type 2 adapter card Rev marking is located next to the TYP...

Страница 18: ...most EO device functions Please refer to Tables Table 1 and Table 2 for specifics on the connections If you have problems working out the configuration please feel free to contact Tech Support for ass...

Страница 19: ...r Thorlabs products such as Pure OEM products that means assemblies to be built into a unit by the user e g OEM laser driver cards Components Mechanics and optics Left over parts of units disassembled...

Страница 20: ...pe thorlabs com Scandinavia Thorlabs Sweden AB Bergfotsgatan 7 431 35 M lndal Sweden Tel 46 31 733 30 00 Fax 46 31 703 40 45 www thorlabs com Email scandinavia thorlabs com France Thorlabs SAS 109 rue...

Страница 21: ......

Страница 22: ...www thorlabs com...

Отзывы: