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ID Date Author Type Category Subject Text   2582   Tue Feb 9 10:10:58 2010 Alberto Update ABSL back to analog I want to try to do the measurement with the network analyzer used as local oscillator, instead of the Marconis that I'm using now.      2679   Thu Mar 18 10:46:51 2010 Koji Update ABSL PLL reconstructed Last night (Mar 17) I checked the PLL setup as Mott have had some difficulty to get a clean lock of the PLL setting.      2680   Thu Mar 18 12:27:56 2010 Alberto Update ABSL PLL reconstructed                                2681   Thu Mar 18 13:40:35 2010 Koji Update ABSL PLL reconstructed We use the current PLL just now, but the renewal of the components are not immediate as it will take some time. Even so we need      2684   Thu Mar 18 21:42:26 2010 Koji Update ABSL PLL reconstructed I checked the setup further more.     I replaced the PD from NewFocus 1GHz one to Thorlabs PDA255.      2696   Mon Mar 22 22:11:26 2010 Mott Update ABSL PLL reconstructed    It looks like the PLL drifted alot over the weekend, and we couldn't get      2697   Mon Mar 22 23:37:32 2010 Mott Update ABSL PLL reconstructed   We have managed to lock the PLL to reasonable stability. The RF input is attenuated      2703   Tue Mar 23 18:44:46 2010 Mott Update ABSL PLL reconstructed    After realigning and getting the lock today, I tried to add in the SR785      4832   Fri Jun 17 16:05:07 2011 kiwamu Update ABSL LightWave out of MOPA box [Suresh / Kiwamu]  We did the following things :      4840   Mon Jun 20 11:38:49 2011 kiwamu Update ABSL I-P curve of LightWave M126-1064-700 The I-P curve of the LightWave NPRO (M126-1064-700), which was taken out from the MOPA box, was      4841   Mon Jun 20 13:48:25 2011 Koji Update ABSL I-P curve of LightWave M126-1064-700 Hmm. Was the current within the operating range? (i.e. Is it a 700mW laser or a 1W one?)      4842   Mon Jun 20 16:44:02 2011 steve Update ABSL I-P curve of LightWave M126-1064-700    Put the serial numbers into the elog. So we can identify the laser and      4855   Wed Jun 22 15:24:10 2011 kiwamu Update ABSL got a laser controller for LightWave Peter King came over to the 40m with a laser controller and gave it to us.      4872   Thu Jun 23 22:59:45 2011 kiwamu Update ABSL I-P curve of LWE  The      4874   Fri Jun 24 00:13:24 2011 kiwamu Update ABSL beam profile measurement of LWE The beam profile of the LWE (LightWave Electronics) NPRO was measured.      4877   Fri Jun 24 07:49:23 2011 steve Update ABSL I-P curve of LWE with serial numbers                                4917   Thu Jun 30 03:26:40 2011 kiwamu Update ABSL status update Status update of the absolute length (ABSL) measurement:      4923   Thu Jun 30 14:11:55 2011 kiwamu Update ABSL a photo of ABSL setup on the AP table Here is a picture of the latest ABSL setup at the east part of the AP table.      4925   Thu Jun 30 21:00:20 2011 kiwamu Update ABSL fine alignment done (Just a quick report) The fine alignment of the ABSL laser injection      4939   Tue Jul 5 16:09:54 2011 kiwamu Update ABSL some photos for ABSL setup Here I show two photos of the latest ABSL (ABSolute Length measurement) setup.       4940   Tue Jul 5 17:38:46 2011 kiwamu Update ABSL ABSL laser frequency-locked In this past weekend the ABSL laser was successfully      5079   Mon Aug 1 04:08:24 2011 kiwamu Update ABSL Arm length measurement : cavity kick technique I made some attempts to measure the current length of      5095   Tue Aug 2 16:55:21 2011 rana Update ABSL Arm length measurement : cavity kick technique                                5117   Thu Aug 4 09:42:19 2011 Koji Update ABSL ABSL Laser shutter closed The shutter of the ABSL laser is closed for the vent work.      8257   Fri Mar 8 12:57:57 2013 Annalisa Update ABSL BS installed on ITMY table  Sendhil and I installed the S polarized BS on the ITMY table to steer the NPRO beam through the AR wedge and align it to the      8258   Fri Mar 8 13:42:35 2013 Jenne Update ABSL BS installed on ITMY table Re:  POY beam reduction. We are able to lock the Yarm with the beam / gain as it is.  I had thought      8303   Mon Mar 18 12:02:12 2013 Annalisa Configuration ABSL ABSL setup for g-factor measurement of PRC Motivations The ABSL technique has been already used in the past to measure the       8361   Wed Mar 27 21:53:21 2013 Annalisa Update ABSL Beat note of ATF auxiliary laser After measuring the beat note, the "Alberto" NPRO auxiliary laser has been moved from the PSL table to the POY table. Its beam      8369   Thu Mar 28 23:00:30 2013 Annalisa Update ABSL Beat note of ATF auxiliary laser found   The beat note for the ATF lab laser has been found.       8495   Fri Apr 26 10:50:07 2013 Annalisa Update ABSL ATF laser on PSL The ATF NPRO auxiliary laser has been moved on the PSL table. All the optics for beat note measurement are in place and alignment      8590   Thu May 16 08:32:05 2013 Steve Update 40m upgrading ETMY op table disabled   All ETMY optical table electronics- lasers-pds turned off, disconnected in order      8594   Fri May 17 00:32:32 2013 Annalisa Update 40m upgrading ETMY - progress [Rana, Annalisa]   GREEN      8595   Fri May 17 15:38:51 2013 Steve Update 40m upgrading ETMY enclosure is on the way back    It  will arrive around 10 am Monday morning.      8596   Fri May 17 16:06:14 2013 rana Update 40m upgrading ETMY op table disabled    TODO:     We need to replace all      8597   Fri May 17 18:24:04 2013 Annalisa Update 40m upgrading ETMY - progress I aligned the green beam into the Faraday. I needed an HWP to have the right polarization for the light entering the Faraday itself.      8622   Thu May 23 00:16:32 2013 Annalisa Update 40m upgrading ETMY - progress  [Annalisa, Koji]   GREEN      8637   Fri May 24 02:12:50 2013 Annalisa Update 40m upgrading ETMY - Mode Matching for green    Mode Matching calculation for green beam - Yarm      8638   Fri May 24 11:38:00 2013 Koji Update 40m upgrading ETMY - Mode Matching for green I got confused. Is the mode calculation in the cavity correct?  Are you sure the wavelength in the      8639   Fri May 24 12:50:25 2013 Annalisa Update 40m upgrading ETMY - Mode Matching for green                                8645   Sat May 25 02:03:48 2013 Annalisa Update 40m upgrading ETMY - Mode Matching for green - new calculation  Mode matching calculation for green - Yarm I      8646   Mon May 27 21:38:53 2013 Annalisa Update 40m upgrading ETMY - Beam Dumps   I put many razor dumps along the IR/green path. The rejected beam from the      8652   Tue May 28 22:11:23 2013 Annalisa Update 40m upgrading ETMY - Yarm shutter cable    For some strange reason the Yarm shutter cable runs up to the POY table,      11521   Thu Aug 20 18:08:28 2015 Ignacio Frogs 40m upgrading Fatality. Something broke. So      12625   Fri Nov 18 00:25:08 2016 Johannes Omnistructure 40m upgrading Acromag Chassis Development I had Rich show me his approach to a chassis for the Acromag modules. The document tree for his design can be found on the DCC.      12634   Tue Nov 22 13:55:32 2016 Johannes Omnistructure 40m upgrading Acromag Chassis Current Acromag chassis status: I found out that Acromag offers DIN rail mounting kits for the open boards,      10130   Sat Jul 5 04:18:45 2014 Andres Update 40m Xend Table upgrade Adding Two Lenses After the Second Steering Mirror in Order Two Increase the Gouy Phase Difference Between the Sterring Mirrors I had been working on the Xend table optical layout update. Since the two steering mirrors in the Xend green are too close to each,  7x    10191   Sun Jul 13 17:06:35 2014 Andres Update 40m Xend Table upgrade Xarm Table Upgrade Calculation and Diagrams of possible new table layout  Current Mode Matching and Gouy Phase Between Steering Mirrors      10195   Mon Jul 14 16:19:41 2014 Andres Update 40m Xend Table upgrade Took the measurement for the Mode Matching  Nick and I measured the reflected power of the green light in locked and unlocked. I'm working      10207   Tue Jul 15 22:23:51 2014 Andres Update 40m Xend Table upgrade Scan the Xarm for the mode matching  Nick and I with the help of Jenne scan the green light when the cavity is unlocked. Nick placed a Beam dump on the IR so that      10226   Thu Jul 17 02:57:32 2014 Andres Update 40m Xend Table upgrade FInish Calculation on Current X-arm mode Matching Data and Calculation for the Xarm Current Mode Matching

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