| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
38
|
Tue Dec 17 10:56:08 2019 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | first data with 3A on the 3rd stage | 2 pictures :
typical beam with HOM
typical beam after moving the D-shape |
|
|
39
|
Tue Dec 17 12:16:54 2019 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Optical amplifier polarization state | We placed a PBS + 2 photodiodes (PhD1,
PhD2) at the output of the amplifier to check
how the polarization of the amplifier changes |
|
|
40
|
Tue Dec 17 17:54:38 2019 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Optical amplifier polarization state | The
polarimeter was giving a strange 50% of DOP
of the light coming from the cavity. |
|
|
41
|
Tue Dec 17 17:58:12 2019 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Beam size behind M2 | the telescope matchs the cold cavity beam,
so it is normal to have a power decrease
on the transmission photodiode when the cavity |
|
|
42
|
Thu Dec 19 09:21:45 2019 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Optical amplifier polarization state | polarization state of the cavity at higher
power : 20kW, 30kW and 33kW (slight
CEP and alignment optimization) : |
|
|
44
|
Thu Dec 19 16:03:17 2019 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Beam size behind M2 | Yesterday, we tried to better adapt positions
of the telescope lenses, dynamically, during
the lock, to improve the matching between |
|
|
45
|
Thu Dec 19 16:23:39 2019 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Cavity beam axis moving with power | how the cavity beam axis is moving during
a lock when the cavity is hot ?
could it explain a part of the Transmission |
9x |
|
46
|
Thu Jan 9 16:54:05 2020 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | Microscope and cleaning of SBOX mirrors | The mirrors went in the cavity the 28th
of november (We did several power up
to 30kW stored and only one to 40kW then |
|
|
47
|
Fri Jan 10 18:51:23 2020 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | analysis of stored and reflected power | the 10th of January, we increased the power
of the amplifier to study the cavity transmitted
and reflected power signals. |
6x |
|
48
|
Fri Jan 24 16:16:24 2020 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | analysis of stored and reflected power | A chart which summarizes
the data we have or we can estimate.
|
|
|
49
|
Fri Jan 24 17:52:14 2020 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | AFM analysis of M1 | AFM has been proceeded on M1 and M2.
The pdf shows the first images
taken with the PLIC room Leica microscope |
|
|
50
|
Fri Jan 24 17:56:11 2020 |
Loïc Amoudry | Fixed | info | lasers and optics | Optical room | AFM analysis of M2 | We had enough time to proceed a quick scan
of M2 which has also a hole but not centered
on the mirror. |
|
|
51
|
Fri Jan 24 17:58:45 2020 |
Loïc Amoudry | Fixed | info | lasers and optics | Optical room | CFBG removed from ThomX CELIA amplifier | The CFBG has been removed successfully
and the amplifier is closed now.
The soldering machine had a calibration |
|
|
52
|
Wed Jan 29 19:00:02 2020 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | Glow discharge cleaner on SBOX mirrors | The glow discharge cleaner has been tested
on the SBOX mirrors.
I've put them 1 by 1. Each |
|
|
53
|
Wed Jan 29 19:04:38 2020 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | SBOX mirrors cleaned | Today, SBOX mirrors have been cleaned with
spin coater on HR face and isoprop on back
face. They show similar spots as before. |
|
|
54
|
Wed Feb 5 14:47:16 2020 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | SBOX mirrors cleaned | Yesterday, after installation and alignment
of mirrors and cavity, the Finesse has been
measured with cavity at air pressure, with |
|
|
55
|
Wed Feb 5 16:46:01 2020 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | SBOX mirrors cleaned | Today we put the cavity to vacuum (~ 0.1
mBar) and we measured again the Finesse with
Koheras and modulation technique. |
|
|
56
|
Thu Feb 6 11:01:08 2020 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | analysis of stored and reflected power | with this Finesse around 22-23k, the technique
comparing TRANSMISSION and REFLECTION signals
doesn't work, even in taking into account |
|
|
57
|
Thu Feb 6 16:58:57 2020 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | Power up to 48kW crater effect again | As we said, after glow discharge and spin
coater we recovered a low power finesse ~23000
(aligning away from the M1 crater). |
|
|
60
|
Wed Dec 16 12:36:37 2020 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | Mirror's cleaning and microscope imaging | On 10th of december 2020 we cleaned the
SBOX mirrors and took microscope images
(the name of the images indicates what they |
14x |