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 Wed Jan 17 23:36:12 2018, johannes, Configuration, General, AS port laser injection 
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 Wed Apr 18 22:46:23 2018, johannes, Configuration, General, AS port laser injection
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Thu Apr 19 01:04:00 2018, gautam, Configuration, General, AS port laser injection
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Thu Apr 19 20:41:09 2018, Koji, Configuration, General, Aux Laser LD dying? (AS port laser injection)
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Tue Apr 24 08:36:47 2018, johannes, Configuration, General, Aux Laser LD dying? (AS port laser injection)
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Thu May 3 10:40:43 2018, johannes, Configuration, General, AS port laser injection
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Thu May 3 12:10:12 2018, gautam, Configuration, General, AS port laser injection
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Wed May 23 00:45:18 2018, johannes, Configuration, General, AS port laser injection
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Message ID: 13881
Entry time: Wed May 23 00:45:18 2018
In reply to: 13810
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| Author: |
johannes |
| Type: |
Configuration |
| Category: |
General |
| Subject: |
AS port laser injection |
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I was planning to set up the additions to the AS table that are outlined in Attachment #1. Unfortunately the beam is too large for the 2mm clear aperture Faraday rotators that we have available at that position. I checked the 40m and QIL and found 5 Faraday isolators/rotators for 1064 nm total, but none have large enough aperture for the current setup. Some options for buying a larger aperture isolator are:
I wanted to leave the rest of the setup undisturbed at first, but I think a much easier solution would be to move the 2" focusing lens up by about 12", which moves the beam focus away from AS55 to where the Faraday will be placed, but we can re-focus it with another lens. I may have to change the mode-matching for the aux laser fiber slightly to accomodate this change, but if there are no other concerns I would like to start this work tomorrow (Wednesday). |
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