Warning: Undefined variable $s in /var/www/public_html/osl/classes/DAO.php on line 959
NAOJ GW Elog Logbook
LOG-IN
Displaying report 1-1 of 1.
R&D (FilterCavity)
Print this report.
EleonoraCapocasa - 18:10, Thursday 21 July 2016 (278)Get code to link to this report
Calibration of the PSD for the optical lever of filter cavity mirrors

I have calibrated the PSD used for the optical lever of the filter cavity mirrors. PSD model : PDP90A thorlab (see file attached).

I computed the calibration for 4 different values of the power (V_SUM should not exceed 4 V)

V_SUM Normalised_calibration 
1.75 V 0.00554  m
2.08 V 0.00542  m
3.3 V 0.00539  m
3.96 V 0.00536  m

Mean = 0.00543 m  std = 0.00008 m

Normalised calibration seems reasonably independent of the power.

In order to recover the appropiate calibration ( m/V) to convert a voltage signal into a displacement of the beam on the PSD, this value shoud be dived by the measured V_SUM.

Non-image files attached to this report