| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
3000
|
Thu May 27 10:30:32 2010 |
kiwamu | HowTo | Green Locking | PSL setup for green locking | I
leave notes about a plan for the green locking |
|
|
3004
|
Fri May 28 07:13:05 2010 |
Alberto | Frogs | Green Locking | SR785 found abandoned next to the workbenches | A poor lonely SR785 was found this morning
roaming around in the lab in evident violation
of the fundamental rule which requires all |
|
|
3059
|
Wed Jun 9 11:13:11 2010 |
kiwamu | Update | Green Locking | lock with PDH box | A
progress on the end PDH locking :
|
|
|
3065
|
Fri Jun 11 11:54:42 2010 |
kiwamu | Update | Green Locking | end PDH with thermal feedback | A thermal
feedback was installed to the end PDH locking |
|
|
3066
|
Fri Jun 11 13:32:28 2010 |
Koji | Update | Green Locking | end PDH with thermal feedback | GJ!
|
|
|
3092
|
Sun Jun 20 18:28:25 2010 |
kiwamu | Update | Green Locking | Re: lock with PDH box | On the wiki I summarized about the modification
of the PDH box which is currently running
on the end PDH locking. |
|
|
3112
|
Thu Jun 24 01:02:34 2010 |
Sharmilla, Rana and Kiwamu | Update | Green Locking | a channel for PPKTP temperature | We added
a channel on c1psl in order to monitor the |
|
|
3113
|
Thu Jun 24 06:49:29 2010 |
Aidan | Update | Green Locking | a channel for PPKTP temperature | Is this a setpoint temperature that we
can change by writing to the channel or is
it a readout of the actual temperature of |
|
|
3122
|
Fri Jun 25 20:32:30 2010 |
kiwamu | Update | Green Locking | green power on the PSL table | The power
of the green beam generated on the PSL table |
|
|
3188
|
Fri Jul 9 12:25:25 2010 |
kiwamu | Update | Green Locking | SHG on PSL table | In order
to increase the green power on the PSL table, |
|
|
3195
|
Mon Jul 12 13:16:53 2010 |
kiwamu | Update | Green Locking | PZT feedback at X end | The
feedback signal going to the laser PZT at
the X end station was measured in |
|
|
3203
|
Tue Jul 13 11:00:29 2010 |
kiwamu | Update | Green Locking | SHG on PSL table : optimum temeprature | The optimum
temperature for the doubling crystal on the |
|
|
3204
|
Tue Jul 13 11:20:07 2010 |
Dmass | Update | Green Locking | SHG on PSL table : optimum temeprature |
It seems like you might inherit
an offset by using step (3) b/c of the temperature |
|
|
3262
|
Wed Jul 21 19:11:18 2010 |
Dmass | Update | Green Locking | locked | What did you use to filter the 2f components
from your error signal? A homemade low pass
or what? |
|
|
3314
|
Wed Jul 28 18:24:57 2010 |
Jenne | Update | Green Locking | 2 Green Periscopes have mirrors, aligned | [Koji, Jenne, Kiwamu]
This is to describe the work that
went on in the Cleanroom today. Kiwamu's |
|
|
3325
|
Thu Jul 29 21:13:39 2010 |
Dmass | Update | Green Locking | waist positon of Gaussian beam in PPKTP crystals |
|
|
|
3327
|
Thu Jul 29 22:58:25 2010 |
kiwamu | Update | Green Locking | waist positon of Gaussian beam in PPKTP crystals | - As you said, I just calculated the waist
position in the crystal because the speed
of light changes in a medium and eventually |
|
|
3328
|
Fri Jul 30 00:02:15 2010 |
Dmass | Update | Green Locking | waist positon of Gaussian beam in PPKTP crystals |
|
|
|
3330
|
Fri Jul 30 09:51:58 2010 |
kiwamu | Update | Green Locking | Re: waist positon of Gaussian beam in PPKTP crystals | Okay, I guess I understand what you want
to know. I did the following steps.
1. calculated the conversion efficiency |
|
|
3569
|
Mon Sep 13 21:52:53 2010 |
kiwamu | Update | Green Locking | the X end laser is ON |
I turned ON the laser
at the X end station, which had |
|
|
3647
|
Tue Oct 5 11:42:20 2010 |
kiwamu | Summary | Green Locking | developing green locking plant | With a help from Joe, I made a diagram
of the simulated plant for green locking
in order to get better understanding and |
|
|
3663
|
Wed Oct 6 22:46:36 2010 |
kiwamu | Update | Green Locking | SHG at PSL table | I
put some optics to get the green SHG on the |
|
|
3695
|
Tue Oct 12 01:54:32 2010 |
kiwamu | Update | Green Locking | mode matching to doubling crystal on PSL table | I improved
the mode matching of the incident beam to |
|
|
3703
|
Wed Oct 13 00:35:26 2010 |
kiwamu | Update | Green Locking | PSL beat note setup | [ Kevin and Kiwamu ]
We |
|
|
3727
|
Fri Oct 15 06:31:52 2010 |
kiwamu | Update | Green Locking | PSL beat note setup: part II | I
made some KAIZENs (what |
|
|
3803
|
Thu Oct 28 03:07:53 2010 |
kiwamu | Update | Green Locking | 80MHz VCO for green PLL : a health check | I
did a health check for a 80MHz VCO box. |
|
|
3807
|
Thu Oct 28 04:28:50 2010 |
yuta | Update | Green Locking | checked frequency counter SR620 | (Kiwamu, Yuta)
Background: |
|
|
3809
|
Thu Oct 28 11:54:31 2010 |
Koji | Update | Green Locking | checked frequency counter SR620 | ZHL-32A is a high power (well..., actually
middle power) amplifier with the max output
power of +29dBm (~1W!). |
|
|
3813
|
Thu Oct 28 20:08:26 2010 |
yuta | Update | Green Locking | revised RF amp cascading | Background:
Yesterday, I said I will use
ZHL-32A for amplifying beat note signal, |
|
|
3820
|
Fri Oct 29 06:20:20 2010 |
kiwamu | Update | Green Locking | 80MHz VCO for green PLL : VCO calibration | I calibrated the VCO frequency
as a function of the applied input voltage.
|
|
|
3823
|
Fri Oct 29 14:06:12 2010 |
kiwamu | Update | Green Locking | Re: 80MHz VCO for green PLL : VCO calibration | P.S. There is a document about the 80MHz
VCO box. This may be helpful.
|
|
|
3850
|
Wed Nov 3 02:37:39 2010 |
yuta | Summary | Green Locking | coarse locked green beat frequency | (Kiwamu, Yuta)
|
|
|
3851
|
Wed Nov 3 03:00:47 2010 |
Koji | Summary | Green Locking | coarse locked green beat frequency | Wow! Great guys!! |
|
|
3879
|
Mon Nov 8 10:48:58 2010 |
kiwamu | Update | Green Locking | 80MHz VCO : PLL open loop looks good | |
|
|
3881
|
Mon Nov 8 16:03:46 2010 |
kiwamu | Update | Green Locking | 80MHz VCO : PLL open loop looks good |
|
|
|
3896
|
Thu Nov 11 13:54:05 2010 |
kiwamu | Update | Green Locking | 80MHz VCO : about PLL hold-in range |
The hold-in |
|
|
3898
|
Thu Nov 11 17:47:36 2010 |
kiwamu | Update | Green Locking | 80MHz VCO : improve PLL hold-in range and put a boost | In order
to enlarge the hold-in range I modified the |
|
|
3908
|
Fri Nov 12 12:06:11 2010 |
Aidan | Configuration | Green Locking | PID script working - now it needs to be tuned | I've set up a PID script that senses
the EX-PSL Green Beat note (from the frequency
counter) and actuates on the temperature |
|
|
3920
|
Mon Nov 15 11:52:22 2010 |
kiwamu | Update | Green Locking | PLL with real green signal | |
|
|
3927
|
Mon Nov 15 17:10:59 2010 |
kiwamu | Update | Green Locking | PLL with real green signal | I
checked the slow servo and the PLL of 80MHz |
|
|
3930
|
Tue Nov 16 09:02:54 2010 |
Aidan | Update | Green Locking | PID loop - calibration of SR620 output | [Aidan, Kiwamu]
Kiwamu and I roughly calibrated the
analogue output from the SR620 frequency |
|
|
3931
|
Tue Nov 16 10:47:45 2010 |
Aidan | Update | Green Locking | Rebooted c1psl - added new GRNBEAT_FREQ channel | I restored C1:PSL-126MOPA_126MON to its
original settings (EGUF = -410, EGUL = 410)
and added a new calc channel called C1:LSC-EX_GRNBEAT_FREQ |
|
|
3932
|
Tue Nov 16 12:47:30 2010 |
Aidan | Update | Green Locking | PID loop but no green | The PID loop is ready to be run on the
green beat note but, since the tanks are
open, there is no green transmission from |
|
|
3934
|
Tue Nov 16 16:00:26 2010 |
Aidan | Update | Green Locking | PID loop but no green |
|
|
|
3970
|
Mon Nov 22 20:31:58 2010 |
kiwamu | Update | Green Locking | searching for unknown loss in green PD path | As I said in the past entry (see
this entry), there was unknown loss of
about 20dB in the beat detection path. |
|
|
3972
|
Tue Nov 23 01:45:47 2010 |
kiwamu | Update | Green Locking | noise curve of wideband RFPD |
|
|
|
4007
|
Fri Dec 3 05:21:11 2010 |
kiwamu | Update | Green Locking | locked the laser to the cavity | I succeeded
in locking the end green laser to X arm with |
|
|
4016
|
Mon Dec 6 22:18:39 2010 |
kiwamu | Update | Green Locking | aligned the beam axis | [Suresh and Kiwamu]
We |
|
|
4093
|
Thu Dec 23 12:19:43 2010 |
kiwamu | Update | Green Locking | installed doubling oven base at PSL table | I
gave a christmas present to a doubling oven
who has been sitting on the PSL table. |
|
|
4095
|
Thu Dec 23 18:51:37 2010 |
rana | Update | Green Locking | installed doubling oven base at PSL table | This is not such a bad base design, but
remember that we have to get a couple of parts |
|