Josh Notebook: Difference between revisions
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'''5/13/2014''' |
'''5/13/2014''' |
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More 1064 laser problems today. Can't quite describe problem. The cavity peaks (without modulation) are very sensitive to cavity piezo position. Something doesn't look right about the peaks. They almost look like the laser is multimode, but checking with the OSA, it doesn't appear to be. I'm not sure what the problem is. I had a ton of trouble getting the peaks to be single mode, and when I did, it wasn't a very stable single mode. A slight change in the cavity piezo or in the alignment made a bigger-than-normal difference in the single-modeness. |
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Revision as of 23:15, 13 May 2014
5/12/2014
Today I discovered the internet.
Also, I aligned the 807 (anti-Stokes from 1064) that goes through the dichroic mirror on the 1064 side. It is now coupled to a multimode fiber that we can send to the OSA. The laser was behaving pretty weirdly, so it's only kind-of aligned. (The resonant peaks were extremely sensitive to the piezo positions, and there were many multimode regions.) This was done using the old (home-made) locking circuits with only the fast modulation on (laser flashing).
5/13/2014
More 1064 laser problems today. Can't quite describe problem. The cavity peaks (without modulation) are very sensitive to cavity piezo position. Something doesn't look right about the peaks. They almost look like the laser is multimode, but checking with the OSA, it doesn't appear to be. I'm not sure what the problem is. I had a ton of trouble getting the peaks to be single mode, and when I did, it wasn't a very stable single mode. A slight change in the cavity piezo or in the alignment made a bigger-than-normal difference in the single-modeness.