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Entry  Wed Jul 20 11:58:45 2022, Paco, Summary, General, Jenne laser kaput? 
    Reply  Wed Jul 20 14:12:07 2022, Paco, Summary, General, Jenne laser kaput! 
       Reply  Wed Jul 20 15:58:52 2022, Koji, Summary, General, Jenne laser kaput! 
          Reply  Mon Jul 25 09:05:50 2022, Paco, Summary, General, Testing 950nm laser found in trash pile PXL_20220722_234600124.jpgPXL_20220722_234551918.jpg
             Reply  Fri Aug 5 17:03:31 2022, Yehonathan, Summary, General, Testing 950nm laser found in trash pile 20220805_164434.jpgLaserActuation_TF_Measurement.drawio.pdf
                Reply  Wed Sep 28 19:15:56 2022, Koji, Update, General, Testing 950nm laser found in trash pile PXL_20220929_013850989.MP.jpgPXL_20220929_013859439.jpgPXL_20220929_013911125.jpg
Message ID: 17030     Entry time: Mon Jul 25 09:05:50 2022     In reply to: 17023     Reply to this: 17064
Author: Paco 
Type: Summary 
Category: General 
Subject: Testing 950nm laser found in trash pile 

[Paco, Yehonathan]

==== Late elog from Friday ====

Koji provided us with a QFLD-950-3S (QPHOTONICS) salvaged from Aidan's junk pile (LD is alive according to him). We tested the Jenne laser setup with this just to decide if we should order another one, and it worked.

The laser driver anode and cathode pins (8/9, 4/5 respectively) on the rear DB9 port from the  ILX Lightwave LDX-3412 driver were connected to the corresponding anode and cathode pins in the laser package (5, and 9; note the numbers are reversed between driver and laser). Then, interlock pins 1 and 2 in the driver were shorted to enable operation. This is all illustrated in Attachments #1-2.

After setting a limit of 27.6 mA current in the driver, we slowly increased the actual current to ~ 19 mA until we could see light on a beam card. We can go ahead and get a 1060 nm replacement.

Attachment 1: PXL_20220722_234600124.jpg  1006 kB  Uploaded Mon Jul 25 10:20:37 2022  | Hide | Hide all | Show all
PXL_20220722_234600124.jpg
Attachment 2: PXL_20220722_234551918.jpg  481 kB  Uploaded Mon Jul 25 10:23:44 2022  | Show | Hide all | Show all
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