| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
222
|
Fri May 17 15:02:01 2024 |
Xinyi Lu | Fixed | info | lasers and optics | Optical room | high-power experiments of 2-mirror cavity | Here's a summary of our experiment
last week:
The initial telescope position: |
6x |
|
223
|
Wed Jun 19 10:38:00 2024 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | Optical room | D-shape mirrors positionning status | summary:
- the motors used to move the D-shape
are the Newport Picomotors 8303-V |
|
|
224
|
Wed Oct 2 10:12:55 2024 |
Ronic Chiche | Under Process | issue | lasers and optics | Optical room | CELIA 100W laser amplifier repair | this morning with Alice, we sent the Menhir
160MHz injected in a fiber (with 6mW at the
end of a long fiber) into the laser amplifier, |
|
|
225
|
Wed Oct 2 18:12:54 2024 |
Ronic Chiche | Under Process | issue | lasers and optics | Optical room | CELIA 100W laser amplifier repair | this afternoon, we saw some electric cables
badly connected to their power supply.
we fixed it by soldering them together |
|
|
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 | Under Process | 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. |
|
|
228
|
Tue Dec 3 13:51:52 2024 |
Ronic Chiche | Fixed | info | utilities | Optical room | optical table cleaning | this morning with Alice and Daniele, we
removed all the optics elements and equipments
from the SBOX optical table and started to |
|
|
229
|
Fri Dec 6 16:59:57 2024 |
Ronic Chiche | Fixed | info | utilities | Optical room | optical table cleaning | this afternoon, we checked the dust meter
which is at 0 for 1 and 5µm dust particles
but ~ 2000-3000 for 0.3µm particles. |
|
|
230
|
Mon Dec 16 10:20:56 2024 |
Ronic Chiche | Under Process | 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 |
|
|
231
|
Tue Mar 4 18:33:26 2025 |
Ronic Chiche | Fixed | info | utilities | Optical room | optical table cleaning | now, it seems the table is clean enough
(dust meter counts 0 particles) to install
a 2 mirrors FP-cavity. |
|
|
232
|
Tue Mar 4 18:51:57 2025 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | Optical room | Alignment of a 2-mirror FP cavity | today with Alice,
- we measured the height of the
SBOX windows center : 140mm from the optical |
|
|
233
|
Fri Mar 21 18:27:36 2025 |
Alice Renaux | Under Process | report | mechanics | lasers and optics | Optical room | 2-mirror cavity alignment | At the beginning of the week, I installed
a half-wave plate, a beamsplitter cube and
a quarter-wave plate, as well as the end-of-cavity |
|
|
234
|
Tue May 27 18:12:22 2025 |
Alice Renaux | Under Process | 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 | Under Process | 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 | Under Process | 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 |
|
|
238
|
Mon Jun 23 14:38:33 2025 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | detectors and electronics | Optical room | first attempt to lock | With Alice, we installed the EOWaves oscillator
to be locked on the FP-cavity (T1 ~ 2500ppm,
T2 ~ 10ppm => F ~ 2500) |
|
|
239
|
Thu Aug 28 15:29:00 2025 |
Alice Renaux | Under Process | 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 | Under Process | 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 |
|
|
241
|
Thu Sep 4 17:35:50 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | Optical room | Installation of the avalanche photodiode | After installing the 2nd EOM, we had some
trouble to be able to lock again.
One possible reason was the very low |
|