| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
72
|
Thu Oct 10 17:51:26 2019 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | Optical room | 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 |
|
|
73
|
Thu Oct 10 18:03:10 2019 |
Ronic Chiche | Fixed | issue | mechanics | Optical room | First Lock with 2nd satge of amplifier : Motor issue ? | Global locking almost clean : tranmission
and reflection are quite noiseless except
the peaks at every 500ms. |
|
|
74
|
Fri Oct 11 18:42:32 2019 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | Optical room | First Lock with 2nd satge of amplifier : Finesse issue ? | First of all, we used and optical spectrometer
to determine which proportion of pump and
signal is in the injected beam. |
|
|
75
|
Fri Oct 11 18:49:00 2019 |
Ronic Chiche | Fixed | info | detectors and electronics | Optical room | New locking scheme | Before, the locking scheme was to produce
an error signal with the PDH box, send its
output to the electronic amplifier box and |
|
|
81
|
Fri Nov 22 17:56:56 2019 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | Optical room | 30Hz noise issue | since some days, we observe the cavity
is difficult to lock and a strange 30Hz noise
has appeared on the PZT signal which normally |
|
|
82
|
Tue Nov 26 16:11:52 2019 |
Ronic Chiche | Fixed | issue | mechanics | Optical room | First Lock with 2nd satge of amplifier : Motor issue ? | The 500 ms noise disapeared. We had to
disable the "power save" mode of
the smaract translation stage. AND turn OFF |
|
|
84
|
Tue Nov 26 16:35:39 2019 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | Optical room | 30Hz noise issue | The 30 Hz noise issue has been solved !
It came from translation stage
of P1 and/or P4. |
|
|
88
|
Fri Feb 7 14:46:55 2020 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | Beam pulse duration | We installed the 2 CVBG for compression
after the amplifier.
We used an interferometric technique |
|
|
89
|
Wed Feb 12 17:43:43 2020 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | Beam pulse duration | Yesterday, Loic installed a telescope before
CVBG's to reduce the spot size on CVBG's
and reduced the incident angle 0.5-1° |
|
|
90
|
Fri Feb 14 09:26:07 2020 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | Beam pulse duration | Yesterday, Loïc put the CVBG's
back to their specified angles.
We used an interferometric technique |
|
|
94
|
Mon Feb 24 16:28:52 2020 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | Beam pulse duration | Last Thursday (20th of February), Loïc
and Titouan realigned the stretcher CVBG
to its nominal angle and they used an interferometric |
|
|
95
|
Wed Feb 26 10:38:37 2020 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Optical spectrum analyzer resolution | The Koheras @0.5mW is directly connected
with fibers FC/APC -> FC/PC to the Avantes
optical spectrum analyzer. |
|
|
96
|
Wed Feb 26 11:05:09 2020 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Optical spectrum analyzer resolution | Same measurement with Koheras @100mW and
using fiber coupling lenses between Koheras
and Avantes OSA. |
|
|
97
|
Wed Feb 26 16:48:02 2020 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Optical spectrum before and after CVBG | Measurement of the optical spectrum with
Avantes OSA before (1st picture) and after
CVBG (2nd picture) with 2nd stage on the |
|
|
98
|
Fri Feb 28 09:20:37 2020 |
Ronic Chiche | Not Fixed | issue | lasers and optics | Optical room | Amplifier laser diodes issue | This is a long time issue for the ThomX
amplifier : on the 4 pumping diodes available,
the 1st diode has a higher temperature than |
|
|
99
|
Fri Feb 28 17:44:12 2020 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | Pointing stability with CVBG | Yesterday, with Titouan, we made some measurements
on pointing stability of the laser beam after
amplifier and CVBG. |
|
|
101
|
Tue Jul 7 12:49:38 2020 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Finesse measurement after the Edge installation | After the Edge installation inside the
cavity, the Finesse has been measured several
times by modulation technique with an average |
|
|
106
|
Thu Nov 4 13:05:49 2021 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | FP cavity alignment | as the iris used to locate the FP-cavity
axis have been removed before moving the
table inside the Igloo, we have to find again |
|
|
107
|
Thu Nov 4 18:57:16 2021 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | FP cavity alignment | This afternoon, we continued the alignment
of the red laser.
we did it using the 2 final injection |
|
|
108
|
Fri Nov 26 20:12:10 2021 |
Ronic Chiche | Fixed | report | lasers and optics | ThomX igloo | FP cavity alignment | A continuation of the alignment process
was done, there was change in it due to variation
in temperature, |
|