| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8662
|
Fri May 31 11:15:01 2013 |
Annalisa | Update | endtable upgrade | ETMY - Mode Matching for green - new calculation | Since the beam waist after the Faraday
had changed since the last time I measured
it (maybe alignment changed a bit), I made |
|
|
8671
|
Tue Jun 4 16:04:34 2013 |
Annalisa | Update | LSC | ALS-TRY_OUT needs anti-whitening |
|
|
|
8672
|
Tue Jun 4 17:28:09 2013 |
Annalisa | Update | LSC | C1:ALS-TRY_OUT filter and green progress | [Annalisa, Gautam, Rana]
I made the anti-whitening filter
for the C1:ALS-TRY_OUT channel. |
|
|
8674
|
Tue Jun 4 21:50:23 2013 |
Annalisa | Update | LSC | C1:ALS-TRY_OUT filter and green progress |
[Annalisa, Gautam]
The green beam alignment has |
|
|
8679
|
Wed Jun 5 14:43:42 2013 |
Annalisa | Update | LSC | ALS-TRY_OUT DQ channels |
|
|
|
8680
|
Wed Jun 5 15:03:42 2013 |
Annalisa | Update | LSC | C1:ALS-TRY_OUT filter and green progress |
|
|
|
8691
|
Sat Jun 8 00:24:11 2013 |
Annalisa | Update | Green Locking | Y arm locked with green but bad mode matching | [Annalisa, Nic]
After connecting the PD with the
reflection from the arm to the PDH |
|
|
8692
|
Mon Jun 10 21:39:26 2013 |
Annalisa | Update | Green Locking | Y arm locked with green but bad mode matching |
Still no good locking! |
|
|
8695
|
Wed Jun 12 01:56:58 2013 |
Annalisa | Update | Green Locking | Y arm locked with green but bad mode matching |
For the mode matching calculation
I was using the ETMY focal length that I |
|
|
8696
|
Wed Jun 12 22:48:10 2013 |
Annalisa | Update | Green Locking | Y arm locked with green but bad mode matching | After restoring alignment I could see again
strong 00 flashes (about 250-300 counts on
ALS-TRY). So I locked the arm with IR and |
|
|
8699
|
Thu Jun 13 10:57:36 2013 |
Annalisa | Update | Green Locking | Y arm locked with green but bad mode matching | > > Hmmm. You seem to be saying that more
light is reflected than is injected. Is this
a units problem? Or was some IR on the power |
|
|
8704
|
Thu Jun 13 23:28:40 2013 |
Annalisa | Update | Green Locking | Y arm locked with green but bad mode matching |
|
|
|
8715
|
Mon Jun 17 23:53:03 2013 |
Annalisa | Update | Green Locking | Y arm locked on green!! | Y
arm locked on green carrier in 00 mode!
It
locked at almost 280 cts, and the transmitted |
|
|
8734
|
Thu Jun 20 17:47:44 2013 |
Annalisa | Configuration | SUS | ETMY oplev servo | [Jenne, Annalisa]
The ETMY Oplev servo didn't work
properly, when it was activated the ETMY |
|
|
8749
|
Tue Jun 25 23:49:04 2013 |
Annalisa | Update | SUS | ETMY Oplev | I had some problem with the Oplev Servo
today. I was working at the mode matching
fine tuning and I left the Oplev servo enabled |
|
|
8751
|
Wed Jun 26 00:15:51 2013 |
Annalisa | Update | Green Locking | ETMY - green locking and beat note setup | [Koji, Annalisa]
Alignment improving
The alignment of the green |
|
|
8768
|
Thu Jun 27 17:41:08 2013 |
Annalisa | Update | Green Locking | ETMY -beat note found! |
Y |
|
|
8792
|
Wed Jul 3 01:49:46 2013 |
Annalisa | Update | Green Locking | ALS servo configuration | [Koji, Annalisa, Manasa]
Today we worked on the ALS servo
stabilization for the Y arm. |
|
|
8793
|
Wed Jul 3 03:06:29 2013 |
Annalisa | Update | Green Locking | ALS servo configuration |
I realized that I cannot open the
attached plots. I'll fix them tomorrow. |
|
|
8819
|
Wed Jul 10 02:28:04 2013 |
Annalisa | Update | Green Locking | Beat notes lost! | [Manasa, Jenne, Annalisa]
I was going to find the beat note
to start the cavity scan, but I couldn't. |
|
|
8821
|
Wed Jul 10 11:44:02 2013 |
Annalisa | Update | Green Locking | Y beat note found! | I found the beat note for the Y arm. Nothing
was changed with respect to yesterday night,
but the beat is back! |
|
|
8831
|
Thu Jul 11 14:38:38 2013 |
Annalisa | Update | Green Locking | Y arm cavity scan | Yesterday I did a cavity scan with IR while
holding the Yarm with green.
ALS |
|
|
8842
|
Sat Jul 13 03:27:20 2013 |
Annalisa | Update | Green Locking | Y arm caity scan | I started doing a scan of the Y arm cavity
with IR with ALS enabled.
ALS |
|
|
8844
|
Sun Jul 14 18:19:00 2013 |
Annalisa | Update | Green Locking | Arm cavity scan | Yesterday evening Nic and me were in the
lab. The Mode Cleaner was unlocked, but after
many attempt we could fix it and we did many |
|
|
8886
|
Mon Jul 22 03:09:51 2013 |
Annalisa | Update | Green Locking | Y Arm cavity scan | Yesterday and today I was in the lab doing
many cavity scan.
First I did many measurement with |
|
|
8910
|
Tue Jul 23 19:37:08 2013 |
Annalisa | Update | endtable upgrade | End table picture |
|
|
|
8930
|
Sun Jul 28 19:39:04 2013 |
Annalisa | Update | endtable upgrade | Picture | Yend table picture updated on the wiki
page |
|
|
8931
|
Sun Jul 28 20:13:41 2013 |
Annalisa | Update | Green Locking | Y Phase tracker calibration | I did a calibration measurement for the
Y part of the BeatBox using a Marconi. This
is in order to get a more accurate calibration |
|
|
14041
|
Fri Jul 6 12:12:09 2018 |
Annalisa | Configuration | Thermal Compensation | Thermal compensation setup | I tried to put together a rudimentary heater
setup.
As a heating element, I used the |
|
|
14043
|
Sat Jul 7 19:50:38 2018 |
Annalisa | Configuration | Thermal Compensation | Study about the Thermal projection setup and its effect on the cavity | I made some simulation to study the change
that the heater setup can induce on the Radius
of Curvature of the ETM. |
6x |
|
14050
|
Tue Jul 10 23:44:23 2018 |
Annalisa | Configuration | Thermal Compensation | Heater setup assembly | [Annalisa, Koji]
Today both the heater and the reflector
were delivered, and we set down the setup |
8x |
|
14071
|
Fri Jul 13 23:39:46 2018 |
Annalisa | Configuration | Thermal Compensation | Thermal compensation setup - power supply | [Annalisa, Rana]
In order to power the heater setup
to be installed in the ETMY chamber, |
|
|
14081
|
Wed Jul 18 03:14:48 2018 |
Annalisa | Update | General | Vent 80 recovery | [Gautam, Johannes, Koji, Annalisa]
Tonight we increased the power
of the PSL laser and we achieved the lock |
|
|
14476
|
Fri Mar 8 08:40:26 2019 |
Anjali | Configuration | | Frequency stabilization of 1 micron source | The schematic of the homodyne configuration
is shown below.
Following are the list of components |
|
|
14479
|
Thu Mar 14 23:26:47 2019 |
Anjali | Update | ALS | ALS delay line electronics | Attachment #1 shows the schematic of the
test setup. Signal generator (Marconi) was
used to supply the RF input. We observed |
|
|
14481
|
Sun Mar 17 13:35:39 2019 |
Anjali | Update | ALS | Power splitter characterization | We characterized the power splitter ( Minicircuit-
ZAPD-2-252-S+). The schematic of the measurement
setup is shown in attachment #1. The network/spectrum/impedance |
|
|
14482
|
Sun Mar 17 21:06:17 2019 |
Anjali | Update | ALS | Amplifier characterisation | The goal was to characterise the new amplifier
(AP1053). For a practice, I did the characterisation
of the old amplifier.This test is similar |
|
|
14504
|
Sun Mar 31 18:39:45 2019 |
Anjali | Update | AUX | AUX laser fiber moved from AS table to PSL table |
Attachment #1 shows the schematic
of the experimental setup for the frequency
noise measurement of 1 um laser source. |
|
|
14518
|
Fri Apr 5 11:40:57 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source |
Attachment #1 shows the present
experimental setup. The photodiode is now
replaced with PDA255. The farther end of |
|
|
14520
|
Sat Apr 6 02:07:40 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source |
The alignment of the output beam
from the delayed path of MZI to the photodetector
was disturbed when we did the polarisation |
|
|
14529
|
Wed Apr 10 00:33:09 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source |
Attachement #1 shows the input
(ch4-green) modulation frequency and
the photodiode output (ch1-yellow) when the |
|
|
14534
|
Thu Apr 11 09:05:06 2019 |
Anjali | Update | IOO | Spooled fiber |
Attchment #1,2,3 and 4 shows the
results with frequency modulation of 32 Hz,
140 Hz , 300 Hz and without frequency modulation. |
|
|
14540
|
Fri Apr 12 01:22:27 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source | The alignement was disturbed after the
replcement of the beam splitter. We tried
to get the alignment back . But we are |
|
|
14571
|
Thu Apr 25 03:32:25 2019 |
Anjali | Update | Frequency noise measurement | MZ interferometer ---> DAQ |
Attachment #1 shows the time domain
output from this measurement. The contrast
between the maximum and minimum is better |
|
|
14576
|
Thu Apr 25 15:47:54 2019 |
Anjali | Update | Frequency noise measurement | Homodyne v Heterodyne | My understanding is that the main advantage
in going to the heterodyne scheme is that
we can extract the frequecy noise information |
|
|
14578
|
Thu Apr 25 18:14:42 2019 |
Anjali | Update | PSL | Door broken | It is noticed that one of the doors (door
# 2 ) of the PSL table is broken. Attachement
#1 shows the image |
|
|
14579
|
Fri Apr 26 12:10:08 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source | From the earlier results with homodyne
measurement,the Vmax and Vmin
values observed were comparable with |
|
|
14586
|
Tue Apr 30 17:27:35 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source | We repeated the homodyne measurement to
check whether we are measuring the actual
frequency noise of the laser. The idea was |
|
|
14616
|
Fri May 17 10:12:07 2019 |
Anjali | Summary | Equipment loan | Borrowed component | I borrowed one Marconi (2023 B) from
40 m lab to QIL lab. |
|
|
13686
|
Mon Mar 19 07:37:00 2018 |
Angelina Pan | Summary | | Proposed QPD Optical Arrangement | I am currently working on an optical arrangement
consisting of a QPD that measures the fluctuations
of an incoming HeNe laser beam that |
|