HOME SBOX THOMX MINICAV Utilities
THOMX orders THOMX installation THOMX commissioning THOMX control command
  Status of commissioning, report also here plots are reports.  Not logged in ELOG logo
 List  |  Find  |  Login  |  Help 
Entry   First Lock with 2nd satge of amplifier : Finesse issue ?, posted by Ronic Chiche at Optical room about lasers and optics | detectors and electronics 
    Reply   First Lock with 2nd satge of amplifier : Finesse issue ?, posted by Ronic Chiche at Optical room about lasers and optics | detectors and electronics 
Message ID: 72     Entry time: Thu Oct 10 17:51:26 2019     Reply to this: 74
 Author: Ronic Chiche 
 Status: Fixed 
 Type: issue 
 Category: lasers and optics | detectors and electronics 
 Location: Optical room 
 Title: First Lock with 2nd satge of amplifier : Finesse issue ? 

1st lock today with the second stage of the amplifier.
~ 300mW of injected power (but which proportion of the pump and of the signal ? => One must use a spectrometer to determine this proportion)
MAYBE the real injected power of the signal is lower => maybe the Finesse is higher !


Coupling ~ 75%

1.2 mW measured in transmission => ~800W inside the FP cavity
=> Gain ~ 3500 => Finesse ~ 11k !!!

Last Finesse measurement was about 19k ! :-(

ELOG V3.1.4-395e101