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MIF (General)
kazuya.yokogawa - 19:58 Wednesday 26 September 2018 (6303) Print this report
Beatnote between the main laser and a Prometheus

[Midooka, Yokogawa]

Related log: 6239, 6270

The crystal temperature of the main laser (Mephisto) was changed from 27 degree to 46.4 degree by Nakano-san. Then we found the beatnote between the main laser and a Prometheus by sweeping the Prometheus temperature.

  • Mephisto temperature was at 46.4 degree.
  • We found the beatnote at about 40 MHz when Prometheus temperature are at 23.4 degree and 25.5degree.
  • Mode hop of a Prometheus seem to occur at between 24.2deg to 24.6deg.
  • Amplitude of the beatnote was about -22 dBm. (I forgot to measure the incident laser power to the RFPD.)

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