| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
226
|
Fri Nov 29 12:06:05 2024 |
Alice Renaux | Fixed | info | lasers and optics | Optical room | Menhir 160MHz laser | The Menhir 160MHz has been put back in
place on the CELIA amplifier setup. Its output
power is measured to be 150-160mW with an |
|
|
227
|
Fri Nov 29 16:50:04 2024 |
Alice Renaux | Fixed | info | lasers and optics | Optical room | Menhir 216MHz laser | The Menhir 216MHz laser has been put back
in place on the cavity table. Its output
power is measured to be 160mW with an attenuator. |
|
|
230
|
Mon Dec 16 10:20:56 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | Optical room | CELIA 100W laser amplifier repair | friday morning, we add a zoom call with
Jerome Lhermite about the amplifier repair.
he approximately confirmed the amplifier |
|
|
234
|
Tue May 27 18:12:22 2025 |
Alice Renaux | Fixed | report | lasers and optics | Optical room | 2-mirror cavity alignment | Yesterday and today, I replaced the OEWaves
CW laser with the NKT CW laser. Its screen
does not display anything, so it has to be |
|
|
235
|
Wed May 28 10:55:15 2025 |
Alice Renaux | Fixed | report | lasers and optics | Optical room | 2-mirror cavity alignment | The NKT laser PZT sensitivity is ~0.09pm/V
of wavelength variation, which is equivalent
to ~ 25MHz/V |
|
|
236
|
Wed May 28 18:27:27 2025 |
Alice Renaux | Fixed | report | lasers and optics | Optical room | 2-mirror cavity full setup | Today with Ronic, we changed the FP cavity's
mirrors to Layertek (Gamma Factory) mirrors
: |
|
|
237
|
Fri Jun 13 20:10:00 2025 |
Alice Renaux | Fixed | report | lasers and optics | Optical room | Damaged mirrors test | Today with Dorian we tested three mirrors
with which we previously haven't been
able to obtain any resonance or optical beating |
|
|
239
|
Thu Aug 28 15:29:00 2025 |
Alice Renaux | Fixed | report | lasers and optics | Optical room | 2-mirror cavity locking | In June, we encountered some problems regarding
the transmission and error signals (see images
here), |
|
|
240
|
Wed Sep 3 18:10:34 2025 |
Alice Renaux | Fixed | report | lasers and optics | Optical room | Successful lock (finally !) | Today, with Ronic, we managed to get a
successful lock with the NKT laser by setting
up a new PDH box from scratch (photodiode |
|
|
242
|
Thu Sep 4 17:52:03 2025 |
Alice Renaux | Fixed | report | lasers and optics | Optical room | Finesse measurement | Today, with Ronic, we measured the finesse
of the 2-mirror cavity witht the NKT CW laser.
We were able to perfrom the measurement |
|
|
243
|
Thu Sep 4 17:56:50 2025 |
Alice Renaux | Fixed | report | lasers and optics | Optical room | Finesse measurement | (Finesse 2651 is consistent with that obtained
from the mirrors' transmission coefficients,
which is about 3100.) |
|
|
244
|
Tue Sep 9 21:23:11 2025 |
Alice Renaux | Fixed | report | lasers and optics | Optical room | new cavity | Yesterday, we changed the M1 mirror to
a 161185 Gamma
Factory mirror of transmission 460ppm, the |
|
|
245
|
Wed Sep 10 11:27:45 2025 |
Alice Renaux | Fixed | report | lasers and optics | Optical room | new cavity | The 2-mirrors cavity has 460ppm of transmission
for M1 and 10ppm for M2 which should exhibit
a Finesse around 13400. |
|
|
257
|
Thu Aug 27 11:08:44 2026 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | fiber patch cables attenuation measurements | attenuation with 1 mating sleeve :
green jacket fiber : -0.4 dB
blue jacket fiber N°1 : -0.5 |
|
|
258
|
Thu Aug 27 11:13:07 2026 |
Ronic Chiche | Under Process | info | lasers and optics | Optical room | Menhir oscillator phase noise measurement | with Alice, we installed the Menhir 160MHz
oscillator on a breadboad placed on top of
4 damped feet around the amplifier. |
|
|
259
|
Mon Aug 31 15:14:04 2026 |
Ronic Chiche | Under Process | info | lasers and optics | Optical room | Menhir oscillator phase noise measurement | measurements made with Alice:
comparison between the CW OEwaves
oscillator phase noise measured last week |
|
|
260
|
Mon Aug 31 16:15:46 2026 |
Ronic Chiche | Under Process | info | lasers and optics | Optical room | Menhir oscillator phase noise measurement | comparison of the Menhir 160MHz phase noise
with the CW reference.
- in blue, the oscillators are |
|
|
261
|
Mon Aug 31 16:28:31 2026 |
Ronic Chiche | Under Process | info | lasers and optics | Optical room | Menhir oscillator phase noise measurement | after the previous
measurement, we installed similar dampers,
than the ones used belows the aluminium breadboard, |
|
|
73
|
Mon Apr 4 13:58:23 2022 |
Manar Amer | Fixed | issue | detectors and electronics | utilities | Optical room | Clean Airflow Dust measurements | The dust meter cap was cleaned using Alcohol,
and using the filter white cap the dust count
was (0 Av. 10 min) |
|
|
74
|
Fri Apr 8 19:27:12 2022 |
Manar Amer | Fixed | issue | detectors and electronics | utilities | Optical room | Clean Airflow Dust measurements | Dust measurement done today on top
of the SBox average 10min
|
|