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Nick Brewer: Difference between revisions
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* The reflection dip percentage <math>\eta=1-\frac{I_R}{I_{in}}</math>
A couple days ago I shined 84.1 mW of 1055 nm light through the input coupler and measured 4.4 mW transmitted, that corresponds to an input reflectivity of <math>R_{in}</math>=0.9476. I tried to measure the reflection off of the flat surface of the input coupler to account for that but I was unable to see anything; the reflected beam was too big and bright. In the future I should try again with less power.
After aligning the cavity today I measured the finesse by just looking at the ratio of the FSR to the FWHM of the cavity peaks and found <math>F</math>=65.5
After tuning up the cavity today and locking it, we measured 5.5 mW of green. The input power was ~45 mW. That is an efficiency of ~12%.
'''5/20/14'''
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