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David Notebook: Difference between revisions
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==Daily Log==
'''7/2/14'''
Decided to try propagating the beams across the lab instead of making a PVC maze in hopes of getting good spacial separation. We borrowed a breadboard from the optics lab and aligned the HeNe through a PVC pipe about 15 feet away from the diffraction grating. The beam then goes through a lens and onto the photodiode mounted on a translation stage. There is still a signal when locking the 1064 beam, even with the 780 blocked. It looks like the signal might be greater with the 780 unblocked though, suggesting 633 detection, but I will make more thorough measurements tomorrow. The signal does not change unblocking the 780 when the 1064 is not locked, so there is no 780 beam getting to the detector. Whatever it is seems to be from the 1064 or a sideband as we previously believed.
'''7/1/14'''
Realigned 1064 to the cavity and 780 beam after they had been left alone for a few weeks, and got 633 visible again by eye through the flip mirror. Re-overlaped the HeNe beam with the 780 path so that I can see where the generated 633 beam should go. USA is out of the world cup.
'''Business School/Vacation'''
'''6/13/14'''
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