| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
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 |
|
|
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. |
|
|
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 |
|
|
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
: |
|
|
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 |
|
|
242
|
Thu Sep 4 17:52:03 2025 |
Alice Renaux | Under Process | 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 | Under Process | 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 | Under Process | 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 | Under Process | 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. |
|
|
1
|
Wed Sep 26 18:12:44 2018 |
Loïc Amoudry | Fixed | info | lasers and optics | Optical room | Cavity polarization states (Koheras), Finesse of 2 polarization states | Measurments of Finesse with the 2 polarization
states, let's call them H (higher) and
L (lower): 24500 for the H and 23500 for |
|
|
2
|
Mon Oct 1 11:30:39 2018 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | Phase measurement with HASO | 2 measurement.
First one locked, in transmission
of M2 with 2nd stage 0A.Total 89 cm from |
|
|
3
|
Mon Oct 1 14:27:35 2018 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | Phase measurement with HASO | * Loic has to fix the number of files (3)
regarding the number of measurements (2)
* splitted Intensity and phase |
8x |
|
4
|
Mon Oct 1 15:19:48 2018 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | Phase measurement with HASO | with just intensity, the coupling is 98%,
and with phase, x direction coupling is 95%,
y direction 97%, so the telescope is good. |
|