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Message ID: 92     Entry time: Thu May 4 14:01:10 2023 Author: Peter  Type: Update  Category: VLC Electronics  Subject: 532nm Intensity Measurement

I adjusted the rotational mount of the wave plate to see if the power can be 100% coupled into either S or P polarization. The images shown below of the oscilloscope indicate that this is not possible. The minimum transmitted power we can obtain in either S or P polarization is 75mV. The maximum voltage we obtain in either S or P polarization is ~ 740mV. This means that at a maximum, we can obtain ~ 90% polarization in either direction, indicating that our laser has a slightly elliptical polarization.

Attachment 1: graphs(3).jpg  160 kB  | Hide | Hide all

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