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ID Date Author Type Categoryup Subject Text Attachments
  1844   Tue Jan 28 08:46:13 2020 ranaDailyProgressElectronicsDistortion of noisemonit might be the low input impedance of
the board which the coil driver cannot drive..

I suggest you use probes to see
  1845   Mon Feb 3 17:15:59 2020 DuoDailyProgressElectronicsSome confusing noisemon findingsTrying to figure out the nature of the
distortion found in noisemon (1843), I made
a piece of DSUB9 breakout like attachment
  1846   Tue Feb 4 17:30:50 2020 DuoDailyProgressElectronicsSome confusing noisemon findingsI measured the spectrum with the digital
system at all test points on noisemon with
10Hz sine drive (1845), but I saw a lot of
  1871   Thu Dec 3 12:20:19 2020 AnchalSummaryElectronicsTuned and characterized EOM Driver for 37 MHz phase modulationMeasurement details:

New Focus 4004 broadband IR phase modulator
to the output of the SN06 EOM driver.
  1872   Wed Dec 9 17:47:12 2020 PacoMiscElectronicsquick test of 14.75 MHz RFPDOn Monday, tested a 1998 (Rev. 0) RFPD
originally found in Crackle (serial #010).
Looks like it was first resonant at 24.493
  1875   Fri Dec 11 17:53:07 2020 PacoDailyProgressElectronicsUPDH box alternative power supplyToday, after struggling to find a 4-pin
circular power supply cable for the UPDH
box (still interested btw) punched a hole
  1894   Fri Jan 15 17:21:53 2021 PacoDailyProgressElectronicsRFPD TFRecord TF for RFPD SN09, resonant at 36
MHz, using the exact procedure as with EOM
Resonant Driver.
  1902   Wed Feb 17 11:56:48 2021 PacoLab InfrastructureElectronicsUPDH box zero model and SR560 "lock"UPDHv3 box (serial 17142) is bogus. While
retrieving values of some of the components
to plug into working zero model, saw the
  1903   Thu Feb 18 09:39:01 2021 PacoDailyProgressElectronicsPDH error signal misbehavingError signal

Upon closer inspection
the error signal seems to vary quite significantly
on the scope (scanning @ 2 Hz), sometimes
  1767   Mon Jun 4 11:15:17 2018 gautamLab InfrastructureEquipmentLoanCrackle lab ---> 40mJohannes and I have taken the following
equipment from the crackle lab to the 40m
between Friday, June 1, and Sunday, June
  1862   Wed Nov 18 09:14:11 2020 shrutiMiscEquipmentLoanbeam profilerI placed the two beam profilers with the
two laptops and chargers right inside the
Crackle lab, as requested by Paco.
  1863   Wed Nov 18 14:29:00 2020 KojiMiscEquipmentLoanbeam profilerNote: Please don't try to connect these
old Windows to the network. We just extract
the data via USB etc, and that's all
  1866   Mon Nov 23 11:43:26 2020 PacoMiscEquipmentLoanbeam profilerShruti took back the beam profilers today
AM to Cryo.

  1869   Tue Nov 24 16:30:59 2020 PacoMiscEquipmentLoanbroadband EOMBorrowed 1 (new focus) broadband EOM from
for temporary use in Crackle (2 um OPO exp)
  1876   Tue Dec 15 13:00:41 2020 anchalLab InfrastructureEquipmentLoanReceived Marconi and Rb clock from CTNReceived one Marconi 2023A (#539) from
CTN and an SRS FS725 Rb clock. (See CTN/2605)
  1877   Wed Dec 16 22:13:43 2020 anchalMiscEquipmentLoanTook delay line box, compressed nitrogen cylinder and lens
Took a delay line box DB64 from
QIL from the WOPO table. The box was marked
Crackle on it.
Took the compressed
  1878   Wed Dec 16 22:38:55 2020 KojiMiscEquipmentLoanTook delay line box, compressed nitrogen cylinder and lensPhotos, please, because we don't allow
a free-rolling cylinder in a lab.
  1879   Thu Dec 17 11:59:14 2020 PacoMiscEquipmentLoanbeam profilerBorrow both beam profilers and laptops
from WB 264A.
  1893   Fri Jan 15 10:57:39 2021 PacoLab InfrastructureEquipmentLoanBorrow AG4395A and EOM Driver TF re-tuneSee equipment borrowing note here.

Attempting TF measurement for resonant
EOM driver, but not having luck reproducing
  1907   Tue Mar 30 15:18:06 2021 PacoLab InfrastructureEquipmentLoan2um CCD borrowedWith Aidan's assistance, I borrowed

WiDy SWIR camera (Pembroke
WiDy SWIR 640U-A) from the QIL (Attachment
  1909   Tue May 18 10:28:50 2021 PacoLab InfrastructureEquipmentLoanheimann sensor updateHeimann (HTPA80x64d) thermopile array;

First test to grab frames was done in my
personal Win10 machine, with no success.
  108   Wed Dec 19 15:29:14 2007 DmassLaserGeneralTip Tilts Being BakedThe Tip Tilt mirrors are now being baked with
Bob. They should be ready in time.
  144   Tue Jan 5 21:14:46 2010 ZachElectronicsGeneralWaitDone Error ?? The SR785 I am using for the AOSEM
noise measurements (the one that was in the
TCS lab) doesn't seem to want to boot up
  145   Wed Jan 6 14:43:38 2010 ZachElectronicsGeneralWaitDone Error ??Same thing happened when I went in this
morning. I left it for a while (on this time)
and it seems to be working. We might want
  162   Tue Nov 2 15:23:33 2010 AlastairLab InfrastructureGeneralMain turbo back on I've turned the main turbo back on
and aligned the readout now.  The vacuum
is already down to 1e-6torr.  It seems
  251   Fri Jul 22 12:47:54 2011 Larisa ThorneLab InfrastructureGenerallab equipmentI took the liberty of tidying up the Crackling
table a bit.
The Cryo people left us a friendly
  255   Mon Jul 25 15:07:56 2011 Larisa ThorneLab InfrastructureGenerallab 050 The lab floor is being mopped tomorrow.
Perhaps this would be a good time to clean/put
stuff away? (I did start on this a little
  326   Mon Aug 22 14:46:47 2011 Daniel, JanDailyProgressGeneralLow Noise PreamplifierWe built a Low Noise Preamplifier (D060205),
and added voltage regulators for external
power supply, so one can switch between battery
  343   Wed Sep 7 00:28:07 2011 Daniel, JanDailyProgressGeneralLow Noise PreamplifierAs mentioned in th epost from Aug 22nd,
we biult a Low Noise Preamplifier  (D060205).
When we measured its noise level, we did
  366   Sun Oct 23 23:39:10 2011 neat freakLab InfrastructureGeneraldump?see entry here   
  367   Mon Oct 24 16:17:21 2011 Giordon StarkComputingGeneralCompute eigenfrequencies for multiple time values (COMSOL+Matlab) 
  459   Mon Apr 16 15:56:06 2012 ZachLab InfrastructureGeneralThorLabs order shipping today[Eric Q, Zach]
Per Rana's request, we ordered some
parts for the C3 (Coating, Crackle,
  746   Tue Nov 5 21:37:11 2013 ranaComputingGeneralAndroid app for getting GPIB data? http://wiki.processing.org/w/Android   
  1763   Fri Oct 20 14:01:35 2017 ranaMiscGeneralSR560s removedThere were a couple of SR560 in the lab
which I notice have been unplugged for months.
Since this slowly degrades the batteries
  1851   Tue Oct 20 20:41:59 2020 KojiSummaryGeneralDelivered the instrument / components for 2um ECDLI brought in the instrument and components
for 2um ECDL:

1. SAF Gain chip / SAF1900S / Qty2
  1852   Wed Oct 28 17:29:14 2020 PacoSummaryGeneralLab organizationI entered Crackle lab circa ~11:15. I started
some basic lab inventory and started cleaning/organizing
stuff. We will use the first optical table
  1853   Mon Nov 2 18:23:46 2020 PacoDailyProgressGeneral Today; entered lab at ~09:08. I verified
the orientations of the aspheric lenses and
blaze gratings relative to the flextures,
  1855   Fri Nov 6 10:47:49 2020 PacoDailyProgressGeneralConnecting SAF1900SHere is a summary for how to connect the
SAF1900S gain chip to TED200C temperature
controller and LDC220C diode current driver.
  1856   Fri Nov 6 11:58:02 2020 KojiLab InfrastructureGeneralECDL Gratings / Lenses delivered. Powermeter lending from OMC LabThe gratings and aspheric lenses glued
on the mounts were delivered to the lab on
  1857   Mon Nov 9 17:38:18 2020 PacoDailyProgressGeneralSAF gain chip first lightEntered Crackle ~ 8:47 AM.

Briefly fixed the LDC220C connection
to the SAF1900 as described previously,
  1858   Tue Nov 10 00:02:20 2020 KojiDailyProgressGeneralSAF gain chip first lightVery exciting to see the gain chip curve!

Grating orientation: Whaaat...
If you already have the 1um laser SOP approved,
  1859   Tue Nov 10 10:32:57 2020 PacoDailyProgressGeneralSAF gain chip first lightSet grating in front of 1064 nm beam (current
set to 1.058 A for a beam visible on the
IR card). After testing both orientations,
  1860   Wed Nov 11 12:28:33 2020 PacoDailyProgressGeneralEP30 softeningAttempted two methods to soften EP30-2,
the results are summarized below.

(a) Heat -- Used the heat gun set
  1861   Wed Nov 11 12:55:18 2020 PacoLab InfrastructureGeneral1064 pump power curveLog of the output power vs current in the
1064 nm (Innolight) pump laser. The crystal
temperature was set to 45.5 C, and the current
  1865   Fri Nov 20 18:43:31 2020 KojiSummaryGeneralDelivered the instrument / components for 2um ECDL> Temp Controller / TED200C
/ Qty 2 Note One unit temporary used by 2um
PD test setup
  1867   Mon Nov 23 11:44:13 2020 PacoMiscGeneralMDT694B python controllerToday entered lab ~ 09:00. Over the weekend
I coded a PySerial wrapper for the thorlabs
MDT694B single channel piezo controller.
  1868   Tue Nov 24 12:32:56 2020 KojiMiscGeneralMDT694B python controllerWow!
This is really cool! I didn't
realize that this small box has such many
  1873   Wed Dec 9 18:03:31 2020 PacoDailyProgressGeneralLab organizationIn the process of adding a PC/controls,
and other related instruments, reorganized
items in the lab. Threw out some boxes and
  1897   Tue Jan 26 11:47:12 2021 PacoDailyProgressGenerallow quality PDH error signalAfter getting what looked like a decent
cavity reflection signal, installed RFPD
yesterday. For this, removed the lens that
  1904   Wed Feb 24 17:42:49 2021 PacoDailyProgressGeneralDOPO locking and SHGLocking update

The plan during
these past few days has been to have fast
control loop of the cavity (locked to laser
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