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 Sun Aug 1 23:16:45 2010, Dmass, Lab Infrastructure, General, WHERE IS THE WINCAMD? 
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 Mon Aug 2 00:50:58 2010, Zach, Lab Infrastructure, General, WHERE IS THE WINCAMD?
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Mon Aug 2 12:24:01 2010, Dr. Evil, Lab Infrastructure, General, WHERE IS THE WINCAMD?
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Mon Aug 2 14:15:10 2010, Dmass, Lab Infrastructure, General, WHERE IS THE WINCAMD?
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Mon Aug 2 16:11:41 2010, Homer, Lab Infrastructure, General, WHERE IS THE WINCAMD?
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Mon Aug 2 21:02:19 2010, Dmass, Lab Infrastructure, General, PMC Waist
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Fri Aug 6 14:12:22 2010, Dmass, Lab Infrastructure, General, WHERE IS THE WINCAMD?
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Fri Aug 6 16:56:58 2010, Aidan, Lab Infrastructure, General, WHERE IS THE WINCAMD?
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Sat Aug 7 13:45:52 2010, Dmass, Lab Infrastructure, General, WHERE IS THE WINCAMD?
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Message ID: 909
Entry time: Fri Aug 6 14:12:22 2010
In reply to: 887
Reply to this: 910
912
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| Author: |
Dmass |
| Type: |
Lab Infrastructure |
| Category: |
General |
| Subject: |
WHERE IS THE WINCAMD? |
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| Quote: |
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I was trying to understand why the mode matching through the PMC was so bad (I got 30 mW transmitted with 120 mW input).
- I looked at the mode on the PMC REFL camera, and it did not look very guassian.
- I changed the laser current from 2 A to 2.2 A (what Rick said they ran it at at LHO) and saw no change in the mode
- I tried to take a beamscan...but could not find the WINCAMD and its computer (again.) I checked the usual suspects (PSL/TCS) and didn't see it.
So. Who knows where the wincamD is?
added: pics of PMC REFL before and after locking, in order
Totally possible that my mode matching is just that crappy? Maybe.
I did take beam scans of the mode going into the PMC just before aligning to it for the final time. I can do so again to get real profiles and characterize the H1NPRO
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Here are some scans of the beam with the winCAMD. I had a reflective ND filter on for these (hence some of the fringing).
- 5-10 inches in front of NPRO (through mirror transmission)
- 21 inches in front of NPRO (maybe junk b/c of ND filter? Maybe not?)
- Downstream of: HWP and PBS to get 120 mW total (about 8% power), and some focusing lenses (this was at PMC waist). I think this is the "junk light" you get from an NPRO. Maybe this is a lot of power to have in junk, maybe not?
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