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Improvement to M^2 Measurement #46

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sunjerry019 opened this issue Apr 29, 2022 · 0 comments
Open

Improvement to M^2 Measurement #46

sunjerry019 opened this issue Apr 29, 2022 · 0 comments

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@sunjerry019
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Currently, the setup:

  1. Finds the center
  2. Finds the Z_R
  3. Measures the M^2

The M^2 measurement may be sped up by

  1. Taking rough measurements of the beam caustic
  2. Doing a fit to obtain rough Z_R and center measurements
  3. Taking a few more measurements within the +/-Z_R range.
  4. Doing a refit

This reduces the total number of measurement points significantly.

(Idea from Thorlabs)
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@sunjerry019