| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2044
|
Fri Mar 4 16:18:45 2016 |
Koji | Misc | General | Photos of the experiment | https://goo.gl/photos/FaqFC7tuxz76m2236 |
|
|
2046
|
Sun Mar 6 02:25:47 2016 |
Koji | Misc | General | PD glass reflections | OMC_Lab/252 |
|
|
2127
|
Wed Jun 28 20:05:02 2017 |
Koji | Update | WOPO | PDs for homodyne detector | I beieve that they are Exelitas C30642.
FYI: There also is one on the former-gyro
optical table. This one doesn't have |
|
|
2129
|
Fri Jun 30 12:17:07 2017 |
Koji | Update | WOPO | Mode Matching Woes - Fibre issues | Measure the profile of the back propagation
beam by injecting a beam from the other side.
This gives you how the input mode |
|
|
2131
|
Sun Jul 2 21:21:39 2017 |
Koji | Update | WOPO | Mode Matching Woes - Fibre issues | Jenne's laser at the 40m PD testing
table is a fiber coupled 1064nm DL.
But you just can couple 5~10% of |
|
|
2132
|
Wed Jul 5 16:44:34 2017 |
Koji | Update | WOPO | PDs for homodyne detector | Correction: If the diode is 3mm x 3mm,
it is Excelitas C30665. |
|
|
2139
|
Mon Jul 17 19:36:59 2017 |
Koji | Misc | General | Ants in the lab | I thought the ants we usually have around
us are Argentine Ants. I agree that they
are not primarily attracted to sugar but |
|
|
2286
|
Fri Dec 21 15:33:26 2018 |
Koji | DailyProgress | WOPO | Diabolo: trialing SHG oven set temperature points to see if there is a maxima when locked | This means that you want to make the SHG
crystal longer. Is that true? If so, can
you change the temperature for the optimal |
|
|
2290
|
Mon Dec 24 12:07:18 2018 |
Koji | DailyProgress | WOPO | Diabolo: back to power with deliberate pre-misalignment | Great recovery job!
|
|
|
2299
|
Mon Feb 25 20:42:32 2019 |
Koji | Summary | Scatterometer | Si Block stored in Cryo Lab | On the Friday cleaning, we vacated the
east optical table. The Si scatterometer
was disassembled and the Si block was moved |
|
|
2359
|
Wed Jun 5 14:16:07 2019 |
Koji | Update | 2micronLasers | 2um laser / cryo stat: setup inspection and action item updates | [Aidan, Chris, Koji]
We went down to the lab to check
the situation of the setups for 2um laser |
|
|
2366
|
Wed Jun 26 11:45:09 2019 |
Koji | Summary | 2micronLasers | 2um PD transimpedance | The transimpedance amps for the 2um (unamped)
InGaAs detectors were made and evaluated.
Attachment |
|
|
2368
|
Mon Jul 1 21:20:55 2019 |
Koji | Summary | 2micronLasers | The PDs delivered to the lab | The amplifier sets for the thorlabs 2um
PDs were delivered to the lab.
- PD1 and Amp1, PD2 and Amp2 are |
|
|
2373
|
Mon Jul 22 20:36:35 2019 |
Koji | Electronics | 2micronLasers | Sockets for LaserComponents PDs | We received the TO-66 sockets for LaserComponents
PDs (Andon Electronics F425-1009-01-295V-R27-L14
Qty.10). It is made of FRP. It is very nicely |
|
|
2378
|
Mon Jul 29 15:46:50 2019 |
Koji | Laser | 2micronLasers | Optical Phase noise of 2 um Mach Zehnder Interferometer. | Great! Can you convert this into the laser
frequency noise Hz/rtHz? I believe this [rad/rtHz]
was still the measured phase noise and was |
|
|
2387
|
Sun Aug 11 14:35:41 2019 |
Koji | Noise Budget | 2micronLasers | Noise Analysis of voltage regulator using SR785 Spectrum Analyser | Questions:
1) Has the DC output voltages of
the regulators checked? |
|
|
2389
|
Sun Aug 11 22:34:50 2019 |
Koji | Noise Budget | 2micronLasers | Noise Analysis of voltage regulator using SR785 Spectrum Analyser | 3. You need to flip the direction of the
diode.
1&2 OK, so the circuits were |
|
|
2393
|
Mon Aug 12 15:17:05 2019 |
Koji | Noise Budget | 2micronLasers | Noise Analysis of Voltage Regulator using SR785 Spectrum Analyser | 1. Heat: Check the polarity of the electrolytic
or tantalum caps.
2. Add 0.1uF high-K ceramic caps |
|
|
2400
|
Thu Aug 15 02:30:29 2019 |
Koji | Summary | 2micronLasers | InAsSb PDs accomodated in PD housings / PD cables | InAsSb PDs were housed in the PD cages.
The cages were engraved to indicate the batch
(Sb3512 or 3513) and the serials (A1, A2, |
9x |
|
2404
|
Fri Aug 16 01:28:28 2019 |
Koji | Summary | 2micronLasers | Switchable breakout bok | DB9 switchable breakout box is ready. We
are ready to do some PD test now. |
|
|
2409
|
Fri Aug 23 17:35:37 2019 |
Koji | Noise Budget | 2micronLasers | Noise Analysis of Circuit using SR785 Spectrum Analyser and Zero Simulation | The TF looks good. But the noise measurement
is obviously limited by the SR785 noise.
We need a preamp, which is only for the purpose |
|
|
2412
|
Thu Aug 29 15:36:49 2019 |
Koji | Noise Budget | 2micronLasers | Noise Bump observed at 8kHz during TIA noise analysis | You need to check the voltage noise of
the regulator outputs with the opamps connected.
Probably you did it. If so, it is a riddle |
|
|
2420
|
Tue Sep 10 18:38:18 2019 |
Koji | Noise Budget | PD noise | Dark Noise measurement of Extended InGaAs | - Previously, your TIA was pretty much
dominated by the thermal noise current of
the 5K transimpedance resistor (=0.129/sqrt(5000) |
|
|
2423
|
Mon Sep 23 10:49:27 2019 |
Koji | Summary | PD QE | QE and dark current of InAsSb sensors | The QE and dark current of all
the InAsSb sensors were measured.
All the measurements were done in room temperature. |
|
|
2424
|
Mon Sep 23 23:48:12 2019 |
Koji | Update | 2micronLasers | 2um sensor cards / focusing optics | Fiber Collimator (Thorlabs F028APC-2000+AD11F+LMR1)
and MIR sensor cards (Thorlabs VRC6S Qty2)
were delivered. |
|
|
2425
|
Wed Sep 25 01:05:30 2019 |
Koji | Summary | PD QE | QE and dark current of InAsSb sensors | The lenses were arranged so that the spot
on the PD can become smaller. A quick measurement
on a (500um)^2 element showed the QE of ~80% |
|
|
2436
|
Tue Oct 22 15:55:52 2019 |
Koji | Electronics | General | Borrowed ITC510 from Cryo | From Cryo Cav setup
Borrowed ITC510 Laser Driver/TEC
controller combo -> QIL |
|
|
2438
|
Thu Oct 31 18:31:10 2019 |
Koji | Laser | PD QE | PD EQE vs Spot size | InAsSb PD QE Test
The relationship between the spot
radius and the apparent QE (EQE) was measured. |
|
|
2439
|
Fri Nov 1 12:47:18 2019 |
Koji | Laser | PD QE | PD EQE vs Spot size | Clipping and saturation were investigated
by the semi-analytical model. In the analysis,
the waist radius of 20um at the micrometer |
|
|
2443
|
Tue Nov 12 03:40:39 2019 |
Koji | Laser | PD QE | PD EQE vs Spot size | The QE of the (500um)^2 element has been
tested with a half-power (0.51mW) instead
of 0.92mW. |
|
|
2446
|
Fri Nov 15 20:10:00 2019 |
Koji | Summary | 2micronLasers | InAsSb PD Mounts designed |
|
|
|
2450
|
Wed Nov 20 11:59:17 2019 |
Koji | Lab Infrastructure | General | Moved IR Labs cryostat into QIL from Cryo Lab | Ah, I have designed the PD holder with
the venting targeted for 1/4-20 holes with
1" grid... |
|
|
2451
|
Wed Nov 20 12:25:58 2019 |
Koji | Lab Infrastructure | General | Moved IR Labs cryostat into QIL from Cryo Lab | The large cryostat has 1/4-20 holes on
a 2 inch grid
The IR labs cryostat has 4-40 holes |
|
|
2452
|
Wed Nov 20 17:44:10 2019 |
Koji | Lab Infrastructure | General | Moved IR Labs cryostat into QIL from Cryo Lab | Here you are. |
|
|
2457
|
Fri Nov 22 15:33:40 2019 |
Koji | Lab Infrastructure | General | Moved IR Labs cryostat into QIL from Cryo Lab | Salvaged an assort of vented/non-vented
screws, washers, spring washers, and clamps
for #4-40 & 1/4-20 from the 40m cleanroom |
|
|
2458
|
Sat Nov 23 13:00:06 2019 |
Koji | Lab Infrastructure | Optics | Optical window transmission measurement | The power transmission of the optical window
for the IRLab cryostat was measured to be
0.966+/-0.002 |
|
|
2459
|
Mon Nov 25 15:03:34 2019 |
Koji | Update | PD QE | In solder and PD mounts are in | The PD mounts were delivered from ProtoLabs.
The order was sent on Tue last week and it's
here on Monday. Excellent! |
|
|
2460
|
Mon Nov 25 21:46:56 2019 |
Koji | Summary | PD QE | System Diagram | System diagram of the PD QE test with the
IRLabs cryostat.
|
|
|
2462
|
Tue Nov 26 18:49:11 2019 |
Koji | Update | PD QE | Socket soldering test piece made | Normal solder (Sn63 Pb37): with flux, wetting
o
Pure Indium - In 99.995: no flux, |
6x |
|
2463
|
Wed Nov 27 20:38:57 2019 |
Koji | Summary | PD QE | System Diagram | The external Dsub cable is ready except
for the 32pin connector to be plugged-in
to the chamber. See QIL |
|
|
2464
|
Sun Dec 1 01:32:19 2019 |
Koji | Summary | PD QE | PD TEC cooling test | While I'm still waiting for the proper
connector for the vacuum feedthru of the
IRLabs cryostat, I have connected to the |
|
|
2465
|
Tue Dec 3 13:52:04 2019 |
Koji | Update | PD QE | Socket soldering test piece made | [Raymond and Koji]
We dunked the PD socket test piece
into LN2 and repeated heat cycle 8 times. |
|
|
2466
|
Tue Dec 3 15:32:39 2019 |
Koji | Summary | PD QE | PD TEC cooling test | The quantities we want to measure as a
function of the temperature:
- Temperature: 2.2k thermister |
|
|
2468
|
Thu Dec 5 13:50:59 2019 |
Koji | Summary | PD QE | Dark current measurement with the sourcemeter | I borrowed KEITHLEY 2450 source meter from
Rich. The unit comes with special coaxial
cables and banana clips. Most of the peripherals |
|
|
2471
|
Mon Dec 9 12:34:14 2019 |
Koji | DailyProgress | PD QE | | I can
see some screws are not vented.
You also need to use a vented screw for the |
|
|
2473
|
Mon Dec 9 14:45:45 2019 |
Koji | DailyProgress | PD QE | Toward PD testing automation | Wow. This is great, thanks Chris.
|
|
|
2475
|
Wed Dec 11 01:29:26 2019 |
Koji | Summary | PD QE | Sb3513 A2P6 Dark Current / QE / Dark Noise measurement @77K | [Raymond, Aidan, Chris, Koji]
P6 element (500um)^2
- We looked at the current amp |
|
|
2482
|
Fri Dec 20 21:58:14 2019 |
Koji | Update | PD QE | PD TEC driver / A2P6 aligned / Lens moved | ==
Currently, A2P6 is aligned ==
1) I've brought another TEC driver |
|
|
2483
|
Fri Dec 20 22:26:19 2019 |
Koji | Update | PD QE | PD TEC driver / A2P6 aligned / Lens moved | The QEs were measured at 293K, 239K, 232K,
and 293K again. The cooling was provided
by the PD TEC. At each temperature, |
6x |
|
2488
|
Thu Feb 27 14:26:52 2020 |
Koji | Summary | Lab Monitoring | Item lending: Particle Counter from OMC Lab to QIL | Item lending as per Ian's request:
Particle Counter from OMC Lab to QIL
The current particle class of |
|