CVBG has been installed but reflected power is much lower than before (new power in black with OD1 filter, old power in red... see attached fiber injection scheme)
it seems the OneFive spectrum shifted a lot with 40mW of output power. the center wavelength is roughly 1028.5 nm, thus the CVBG reflection is lower than before as it is much more shifted than before.
as the OneFive output power is low AND wavelength shifted, one used the IACT potentiometer to adjust the pump current.
the voltage at the begining of the operation was 0.35V and it is now 0.6V
the output power is now around 70mW as before.
One has to measure the optical spectrum...
the optical spectrum was exhibiting a strong peak... so one reduced the IACT value to remove the peak... the output power is about 54 mW but the spectrum is still shifted.
one has to use the Frep and CEP motors to see if we can recenter the spectrum.
| Ronic Chiche wrote: |
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SBOX table cleaned and Origami 133MHz laser installed.
power measurement with powermeter and AA-OD1 filter (factor 10 of attenuation) = 3.88 mW
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