ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
252
|
Fri Aug 7 11:41:17 2026 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | cabling | Optical room | Neolase amplifier installation | as soon as I connect the amplifier to the
pipes, the flow decreases to 1.7Lpm.
and the filling process is very |
|
|
251
|
Fri Aug 7 10:59:52 2026 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | cabling | Optical room | Neolase amplifier installation | I cut a small part of the black pipe on
the amplifier side (could it be slightly
deformed by a try with an other type of adapter |
|
|
250
|
Thu Aug 6 15:12:49 2026 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | cabling | Optical room | Neolase amplifier installation | now, I installed the long pipes (2x 3m)
in closed loop (without the amplifier connected),
but the exact ones used to connect the laser, |
|
|
249
|
Thu Aug 6 14:49:32 2026 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | cabling | Optical room | Neolase amplifier installation | I drained the chiller to install again
the short pipe (< 1m) in closed loop.
then, I filled again the chiller |
|
|
248
|
Wed Aug 5 13:49:49 2026 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | cabling | Optical room | Neolase amplifier installation | pipes are maybe too long ?
we can use the Darcy-Weisbach +
Blasius laws (non linear laws). |
|
|
247
|
Wed Aug 5 12:22:52 2026 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | cabling | Optical room | Neolase amplifier installation | now, I connected the chiller circuit to
the amplifier, thanks to the adapters.
chiller IN => blue pipe => |
|
|
246
|
Wed Aug 5 11:25:41 2026 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | cabling | Optical room | Neolase amplifier installation | we have all the adaptor plugs for connecting
the chiller.
so, I tested first the chiller connected |
|
|
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. |
|
|
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 |
|
|
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.) |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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), |
|
|
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) |
|
|
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 |
|
|
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
: |
|
|
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 |
|
|
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 |
|
|
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 |
|