| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
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 |
|
|
287
|
Thu Nov 23 12:25:07 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | as the CFP motors displacements induce
a cavity unlock, we try to change the cavity
length by changing the temperature of elment |
|
|
294
|
Tue Nov 28 18:38:16 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | several days ago, we installed a heating
cable around the output flange (close to
the X-hutch) of the FP-cavity vessel. |
|
|
295
|
Tue Nov 28 19:01:19 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Long term lock of Laser-FP cavity-RF reference | today for the first time, we were able
to make a long term lock of all the elements
(Laser on FP cavity and FP-cavity on RF reference) |
|
|
297
|
Wed Nov 29 12:20:18 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | today, I removed one of the DC voltage
supply (as with 30V, we are already able
to 30°C on the heating cable). |
|
|
298
|
Wed Nov 29 12:33:33 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Long term lock of Laser-FP cavity-RF reference | today, I did a 20 minutes "double
lock" run w/o any single lock loss.
the attached file shows the recorded |
|
|
299
|
Wed Nov 29 16:39:16 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Long term lock of Laser-FP cavity-RF reference | this afternoon, we did a new long-term
"double lock" run w/o any single
lock loss during 1/2h. |
|
|
301
|
Thu Nov 30 15:53:10 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | this afternoon, I started the heating cable after
the warm-up of the FP-cavity :
14h20 : start to fill 50kW |
|
|
302
|
Mon Dec 4 10:45:50 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | last friday, I locked the cavity and then,
switched ON the heating cable after waiting
the cavity reaches a steady state in frequency |
|
|
304
|
Thu Dec 7 14:59:02 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | on last tuesday, I did a long-term measurement
of the frequency drift when the heating cable
is powered ON at 20V (2x 10V) @ t=0mn. |
|
|
306
|
Mon Dec 11 17:21:32 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | today with Fatematuj, we did a long-term
frequency drift measurement between the FP-cavity
loaded with 50kW and the RF reference frequency... |
|
|
324
|
Fri Feb 9 09:50:45 2024 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | 20Hz oscillation in the locking between Laser and FP-cavity | yesterday I did 2 tests to try to understand
the origin of the 20Hz oscillation which
is dominant in the remaining 10-20ps rms |
|
|
325
|
Fri Feb 9 15:49:39 2024 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | 20Hz oscillation in the locking between Laser and FP-cavity | what does this 10ps phase jitter mean in
term of cavity length variations ?
L = L0 + dL sin(2pi fm t) = L0 |
|
|
326
|
Fri Feb 9 18:00:05 2024 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | 20Hz oscillation in the locking between Laser and FP-cavity | measure to be done next week to check the
20Hz noise on the laser amplifier signal:
- install a DET10 in reflection |
|