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R&D (FilterCavity)
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YuhangZhao - 14:03, Saturday 18 May 2019 (1363)Get code to link to this report
Fit of beam going to filter cavity after the improvement of homodyne matching

As I mentioned in the entry, I moved the first lens after OPO. So the beam parameter going to filter cavity is changed. To have a better design for the telescope matching OPO transmission to filter cavity. I made the beam measurement again.

The way that I did measurement is illustrated in the attached figure 1. 

By measuring seven points along a long distance, I fit the beam. The result is shown in the attached figure 2.

The beam waist is even smaller than the last measurement.

Images attached to this report
1363_20190518070251_scheme.png 1363_20190518185646_opotra2.png