| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
257
|
Thu Sep 14 19:16:44 2023 |
Ronic Chiche | Fixed | info | detectors and electronics | Optical room | lock oscillateur 33MHz - synthé 500MHz | this afternoon, we were able to lock the
laser on the FP-cavity and the FP-cavity
on the Ring reference oscillator in a same |
|
|
260
|
Fri Sep 15 18:27:24 2023 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | Fast feedback loop between laser and FP cavity | this afternoon, we tried to better understand
how to drive properly the EOM to kill high
frequency noise. |
|
|
262
|
Fri Sep 15 19:13:44 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | drift calculation for the SMA100A | the goal is to estimate what could be the
frequency drift at 500MHz for the SMA100A:
see phase noise datasheet in attachement |
|
|
267
|
Wed Sep 20 19:12:16 2023 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | Fast feedback loop between laser and FP cavity | I copy the post about Fast Feedback loop
: https://elog.lal.in2p3.fr/FPC/THOMX+commissioning/265
This morning, |
|
|
268
|
Wed Sep 20 19:17:44 2023 |
Ronic Chiche | Fixed | info | detectors and electronics | Optical room | lock oscillateur 33MHz - synthé 500MHz | after a sudden FP-cavity Finesse increase,
we had to install the Fast Feedback Loop
in order to continue to lock the cavity. |
|
|
271
|
Mon Oct 9 13:11:23 2023 |
Daniele Nutarelli | Fixed | info | lasers and optics | ThomX igloo | Tests of pointing stability of the laser CFP | Last monday with Victor we have cheked
the stability of de pointing of the laser
FP. |
|
|
272
|
Tue Nov 7 14:09:25 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | Strecher and fiber injection alignment | Today, the power measured at the input
of the amplifier (PD_IN on the LAL amplifier
software) is 2.5mW instead of >3mW generally |
|
|
274
|
Wed Nov 8 18:52:44 2023 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | some changes in the feedback scheme | from several weeks, the maximum power stored
in the FP-cavity was ~ 5kW.
today with Daniele, we finished |
|
|
275
|
Thu Nov 9 16:40:16 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Ring frequency / Laser "day by day" locking | today, the equivalent Smaract position
corresponding to the 500.25MHz ring frequency
is +156µm on MCS-1/ch0 (closed loop |
|
|
276
|
Thu Nov 9 17:02:26 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Laser / FP-cavity "day by day" locking | today, we locked the FP cavity at ~50kW
with 30% laser amplifier ratio (16W) during
almost all the day (from 10am to 4pm) |
|
|
277
|
Fri Nov 10 09:43:26 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Ring frequency / Laser "day by day" locking | temperature stable around 20.8°C
today, the equivalent Smaract position
corresponding to the 500.25MHz ring frequency |
|
|
279
|
Fri Nov 10 12:37:42 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Laser / FP-cavity "day by day" locking | as the temperature is back to a normal
value ~ 20.8°C, the injected power to
the amplifier (PD_IN in the Alphanov software) |
|
|
280
|
Tue Nov 14 10:35:16 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Laser / FP-cavity "day by day" locking | temperature since we moved to temperature
probe (jump at the beginning of the plot)
below the ring on a metallic base. |
|
|
281
|
Tue Nov 14 10:51:57 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Ring frequency / Laser "day by day" locking | temperature stable around 21.7°C
today, the equivalent Smaract position
corresponding to the 500.25MHz ring frequency |
|
|
284
|
Thu Nov 16 17:48:29 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Laser / FP-cavity "day by day" locking | temperature @ 22.3°C
today, all the PC applications
were closed except the web browser. |
|
|
285
|
Fri Nov 17 11:44:35 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Laser / FP-cavity "day by day" locking | temperature @ 21.9°C
48.5kW inside CFP for 30% amplifier
ratio |
|
|
289
|
Fri Nov 24 12:56:39 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | ThomX igloo | Laser cavity temperature/pressure sensitivity | laser cavity :
when one decreases the laser motor
position, the laser repetition rate |
|
|
290
|
Fri Nov 24 18:16:37 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | ThomX igloo | Laser cavity temperature/pressure sensitivity | Now, I placed a temperature probe stuck on
the laser housing itself.
fig. 1 |
|
|
291
|
Fri Nov 24 18:47:25 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | ThomX igloo | Laser cavity temperature/pressure sensitivity | the last thing we did with Daniele, is
to start/stop the airflow on top of the housing
(closed) to see a possible pressure effect |
|
|
292
|
Tue Nov 28 10:24:47 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | ThomX igloo | Laser cavity temperature/pressure sensitivity | today, I swapped the 500MHz RF reference
oscillator for a Siglent 500MHz DDS oscillator.
see the attached plot : the |
|