| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
218
|
Tue Apr 16 18:38:04 2024 |
Xinyi Lu | Fixed | info | lasers and optics | Optical room | Fiber injection, spectrum and connection of 2nd stage amplifier | Today, Daniele and I injected the laser
into the fiber, installed the telescope,
connected the second stage of the amplifier, |
|
|
219
|
Thu Apr 25 22:12:25 2024 |
Xinyi Lu | Fixed | info | lasers and optics | Optical room | 2 mirror cavity high power experiments | Today, Ronic and I recorded some intracavity
power and cavity mode size as shown in Fig.
1. |
|
|
220
|
Mon May 6 18:38:18 2024 |
Xinyi Lu | Fixed | info | lasers and optics | Optical room | high-power experiments of 2-mirror cavity | Today, Ronic, Daniele and I redo the high-power
2-mirror cavity experiments, and the results
are shown in the table (Figure 1 and |
|
|
221
|
Thu May 16 18:51:17 2024 |
Xinyi Lu | Fixed | info | lasers and optics | Optical room | high-power experiments of 2-mirror cavity | here is a Matlab code to try to optimize
the telescope for a hot cavity,
taking into account the thermal lens |
|
|
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 |
|
32
|
Tue Dec 10 09:36:56 2019 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | FSR and Finesse measurement | Yesterday the cavity has been aligned and
locked with the CW Koheras laser.
the FSR has been measured by modulation |
|
|
33
|
Wed Dec 11 17:13:02 2019 |
Ronic Chiche | Fixed | issue | lasers and optics | Optical room | 2nd stage amplifier issue | the 2nd stage amplifier needed several
hours (4-5h) to reach its nominal power (we
look at photodiode level on a scope), instead |
|
|
34
|
Thu Dec 12 11:49:05 2019 |
Ronic Chiche | Fixed | issue | lasers and optics | Optical room | 2nd stage amplifier issue | Last time, we switched ON directly the
2nd stage at 6A without increasing/decrinsing
slowly the current. |
|
|
35
|
Fri Dec 13 15:56:22 2019 |
Ronic Chiche | Fixed | issue | lasers and optics | Optical room | 2nd stage amplifier issue | 2nd stage output power was going down.
We checked the pump diode technical data
sheet and the operating temperature is [25°C:35°C]. |
|
|
36
|
Fri Dec 13 18:28:00 2019 |
Ronic Chiche | Fixed | report | lasers and optics | Optical room | first data with 3A on the 3rd stage | Today, at 3A on the 3rd stage, we saw some
HOM effects.
the transmissions is about 100mW which |
|
|
37
|
Tue Dec 17 10:46:24 2019 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Beam size behind M2 | Beam diameter behind M2 :
- 2nd stage @ 6A - 1kW inside cavity
sx = 2120 µm |
|
|
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 |
|
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.
|
|