David Notebook: Difference between revisions

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David Notebook (view source)

Revision as of 23:42, 3 November 2014

286 bytes removed ,  3 November 2014
→‎Questions for Deniz
 
*What is the limiting factor in the pump/stokes power we input. Why only 20W--only about 12W for stokes makes it to the cavity.
 
*Sometimes the transmitted photodiode signal shows a positive value when locking, sometimes a negative. Just a photodiode problem? Why does the signal jump up really high, then slowly fall to a steady level, with no real change in output power. Again, just a photodiode artifact?
 
*When under vacuum, does it matter whether the cavity is cooled? Surely alignment will be slightly different, but just for getting the lock working well it would be easier to not have to add nitrogen all the time and to not have the cavity slowly warming up. '''No in principle, but it would probably change cavity mirror couplings and I don't want to have to adjust those and then change them back'''
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