| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
159
|
Thu Oct 13 12:19:11 2022 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | 33MHz laser SN2439 back to Orsay | Today, we succeded to make the laser modelock.
the ouptut power is above 35mW (the
powermeter was saturated) |
|
|
200
|
Mon Mar 20 17:23:09 2023 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | 33MHz laser SN2439 back to Orsay | As the general local network for the FP-cavity
devices is 192.168.xxx.xxx, I changed the
IP adress of the smaract laser motors (Frep |
|
|
35
|
Thu Apr 18 16:17:53 2019 |
Loïc Amoudry | Fixed | issue | lasers and optics | Optical room | 33MHz Onefive power overtime decrease | Power of the 33MHz Onfive decreases over
time. Have to pay attention to that.
Note that air dryers have never been |
|
|
314
|
Tue Jan 16 12:26:12 2024 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | 33MHz (FP-cavity vs RF) phase stability | this morning, with Vincent Chaumat, we
made a beating (phase detection) between
the laser 33MHz and the 33MHz coming from |
|
|
320
|
Fri Jan 26 13:04:56 2024 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | 33MHz (FP-cavity vs RF) phase stability | today, I locked the laser on the
FP-cavity and the FP-cavity on the RF reference
with 47kW inside the FP-cavity. |
|
|
81
|
Fri Nov 22 17:56:56 2019 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | Optical room | 30Hz noise issue | since some days, we observe the cavity
is difficult to lock and a strange 30Hz noise
has appeared on the PZT signal which normally |
|
|
84
|
Tue Nov 26 16:35:39 2019 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | Optical room | 30Hz noise issue | The 30 Hz noise issue has been solved !
It came from translation stage
of P1 and/or P4. |
|
|
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 |
|
|
258
|
Fri Sep 15 18:00:41 2023 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | 20Hz oscillation in the locking between Laser and FP-cavity | this morning, we tried to find the origin
of the 20Hz oscillation.
- we switched OFF the laser Smaract |
|
|
259
|
Fri Sep 15 18:11:07 2023 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | 20Hz oscillation in the locking between Laser and FP-cavity | this afternoon, we did 2 tests to better
understand this 20Hz oscillation:
- we locked the amplified laser |
|
|
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 |
|
|
361
|
Fri Sep 6 17:27:20 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 | could it be possible this 20Hz oscillations
comes from anouncements in the bunker, puting
the housing+table in vibration ? |
|
|
269
|
Thu Sep 21 18:56:56 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | ThomX igloo | !!! strange amplifier beam pointing fluctuations !!! | this morning, I locked the cavity to ~25kW
without any problem.
but this afternoon, the reflected |
|
|
273
|
Wed Nov 8 17:51:30 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | ThomX igloo | !!! strange amplifier beam pointing fluctuations !!! | we confirmed the effect of the bunker temperature
on the laser amplifier "beam pointing"
fluctuations. |
|
|
261
|
Fri Sep 15 18:56:36 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | !!! strange FP cavity behavior => impossible to lock !!! | suddenly, BEFORE switching the HV amplifier
ON and BEFORE connecting it to the EOM (in
order to explore the HV effect on the EOM |
|
|
263
|
Mon Sep 18 12:48:39 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | !!! strange FP cavity behavior => impossible to lock !!! | this morning, we tried:
- to move a bit the arm of the
L-shape off the beam axis (in case of it |
|
|
264
|
Mon Sep 18 17:12:07 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | !!! strange FP cavity behavior => impossible to lock !!! | it could be also an optical unstability,
as when the intra-cavity power increases,
the radius of curvatures of the mirrors increases |
|
|
265
|
Wed Sep 20 14:16:09 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | !!! strange FP cavity behavior => impossible to lock !!! | This morning,
- I installed the fast feedback
loop. |
|