R&D (FilterCavity)
YuhangZhao - 16:41, Monday 20 June 2022 (2983)
Comment to Relative intensity noise measurement for the pump beam sent to OPO (Click here to view original report: 2980)

Yuhang, Aritomi, Marc

A new PD (PDA36A-EC) is used (gain is chosen as 0dB), firstly DARK NOISE is measured (saved as DARKL.txt and DARKH.txt)

A LA1608-YAG lens (75mm) was always used when the beam is apparently large.

1. Measure Mephisto RIN. It is measured at the location where we pick off main laser for CC PLL LO.

The DC voltage is measured as 2.66, 2.61V and 2.67V (measured before and after spectra measurements). (saved as MAINL.txt and MAINH.txt)

2. Measure homodyne LO RIN. It is measured just after IRMC transmission.

The DC voltage is measured as 800mV, 780mV (measured before and after spectra measurements). (saved as LOL.txt and LOH.txt)

3. Measure SHG generated GR RIN. It is measured before MZ.

The DC voltage is measured as 3.14V, 3.16V, 3.24V (measured before and after spectra measurements). (saved as SHGL.txt and SHGH.txt)

This is an experiment record. An analysis of data will come later.