| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
63
|
Mon Sep 30 11:30:32 2019 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Finesse measurement | To complete these observations:
Finesse has been measured
on thursday, right after cleaning the cavity |
|
|
62
|
Mon Sep 30 11:20:48 2019 |
Loïc Amoudry | Fixed | info | lasers and optics | Optical room | Diffusion ULE spherical mirror (S3) vs Fused Silicate injection planar mirror (P1) | Observation made with IR Beam Viewer:
The observation of P1 and S3 simultaneously
while locking shows much higher diffusion |
|
|
61
|
Fri Sep 27 16:17:36 2019 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Finesse measurement | After mirrors were going back from LMA
for cleaning and thermal anealing, they have
been installed in FP cavity for Finesse measurement. |
|
|
60
|
Fri Sep 27 10:43:17 2019 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | New Suprasil mirror from LMA | 19/09/2019 : email from Chrisophe Michel
about AR coating of LMA mirrors after reading
that Ta2O5 layers can be damaged in vacuum |
|
|
59
|
Wed Sep 25 15:49:28 2019 |
Ronic Chiche | Fixed | issue | mechanics | detectors and electronics | Optical room | Motor issue | Today again, same problem with axis 9 blocking
the controlling software during the mirror
alignment procedure. |
|
|
58
|
Thu Sep 12 16:19:26 2019 |
Loïc Amoudry | Fixed | report | mechanics | lasers and optics | Optical room | Cavity dust source check | Several experiments have been done in order
to check the potential source of dust in
the ThomX cavity. For each step, we look |
|
|
57
|
Fri Sep 6 14:59:00 2019 |
Loïc Amoudry | Fixed | info | lasers and optics | Optical room | LMA cleaning technique | Christophe MICHEL told us more precise
informations about spin coater cleaning.
They always clean with pur water |
|
|
56
|
Fri Sep 6 14:48:14 2019 |
Loïc Amoudry | Fixed | report | mechanics | vacuum | Optical room | Primary vacuum to check dust | The cavity has been cleaned then put under
primary vacuum (primary pump without vacuum
flow control). Dusts presence was checked |
|
|
55
|
Tue Sep 3 18:06:29 2019 |
Loïc Amoudry | Fixed | info | lasers and optics | Optical room | Mirrors sent to LMA | Mirrors have been sent today to LMA for
cleaning and maybe annealing (recuit). 3
ULE of ThomX and the fused silicate for injection |
|
|
54
|
Tue Sep 3 18:04:03 2019 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | Finesse measurement after mirror cleaning using the spin coater | Following finesse measurements (start @10700):
Clean P1 with SC (water) + isoprop
(wipe) finesse @15000 |
|
|
53
|
Tue Sep 3 17:51:04 2019 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | vacuum | Optical room | Vessel cleanliness | looking in the vessel of the FP cavity
using a UV lamp shows a lot of dust... more
dust than outside the cavity !!! |
|
|
52
|
Fri Aug 30 17:52:41 2019 |
Ronic Chiche | Fixed | issue | mechanics | detectors and electronics | Optical room | Motor issue | Today, Axis 9 (Z-axis of P1) has blocked
the software which drives all the motors.
impossible to bypass the problem. |
|
|
51
|
Fri Aug 30 17:46:15 2019 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | Finesse measurement after mirror cleaning using the spin coater | today I cleaned S3 with isopropanol and
then with pure water on spin coater.
Finesse is only 10 700.(coupling 50% |
|
|
50
|
Fri Aug 30 09:44:56 2019 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | Finesse measurement after mirror cleaning using the spin coater | Last Finesse measurement in air : ~ 17
000 the 20th of may (see logbook)
28th and 29th of august, we cleanned, |
|
|
49
|
Mon Jul 29 17:15:35 2019 |
Loïc Amoudry | Fixed | info | mechanics | lasers and optics | Optical room | Spin coater air supply removed and front panel changed | Spin coater firstly needed vacuum and air
supply. The air supply being useless for
our experiments, it has been disabled. |
|
|
48
|
Thu Jul 4 18:30:39 2019 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | 2nd stage output power validated | Onefive output power : 28mW
Power before fiber injection :
7.8mW |
|
|
47
|
Thu Jul 4 18:28:55 2019 |
Loïc Amoudry | Fixed | issue | lasers and optics | Optical room | Onefive 33MHz unmodelocked | Oscillator randomly unmodelocked on 3rd
july afternoon (during oscillator power
measurement, maybe a reflection from the |
|
|
46
|
Thu Jul 4 10:17:46 2019 |
Ronic Chiche | Fixed | info | detectors and electronics | Optical room | New design for PDH boxes | A new design has been studied for the 5
PDH boxes to better match the low (33MHz)
repetition rate of the ThomX laser. |
|
|
43
|
Tue Jun 18 20:44:34 2019 |
Huan Wang | Fixed | info | lasers and optics | Optical room | telescope for Koheras | telescope of Koheras is removed, information
record here:
- distance between collimator edge |
|
|
42
|
Wed Jun 12 17:49:20 2019 |
Loïc Amoudry | Fixed | info | lasers and optics | Optical room | Polarization | Polariztion measured with Input vertically/horizontally polarized
(~100% DOLP)
- Transmission (P4) locked on cavity |
|