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ID Date Author Status Type Category Location Title Text   18   Tue Sep 7 17:48:50 2021 Blanc Fixed info lasers and optics | detectors and electronics Optical room Locking of the cavity and setup changing We change the setup a bit to have the same polarization on the photodiode and the PDH (in reflexion of the cavity). CF: schematics      19   Wed Sep 8 10:50:38 2021 Blanc Fixed info lasers and optics Optical room Polarisation Results of the NKT To have the polarisation, we must have 1 value because the laser in entry of the system has 1 polar. Due to that, the graphe      20   Thu Sep 9 16:34:37 2021 Blanc Fixed info lasers and optics Optical room Ring light in the cavity We put a diaphragm in the input beam but it doesn't work to suppress the ring light only but it attenuates the whole transmitted      21   Thu Sep 16 18:23:13 2021 Blanc Fixed info lasers and optics Optical room Polarization Results in transmission After data processing, I finally find the polarization in transmissin of the FPC. As you can see below, the polarisation is not      22   Fri Sep 24 09:55:35 2021 Manar Amer Under Process report lasers and optics Optical room Reflection Line Polarization Measuremet With the help of Ronic the cavity was locked in preparation to measure the polarization of the reflection line when the cavity is      23   Fri Oct 1 16:55:47 2021 Blanc Fixed info mechanics | lasers and optics | detectors and electronics Optical room 1GHz oscillator Frep measurement a previous cavity FSR measurement was giving a center frequency around 867.5MHz. the present 1GHz oscillator Frep measurement      24   Mon Oct 4 14:57:04 2021 Aurélien Martens Fixed info detectors and electronics | software Optical room ip adress of smaract driver the ip adress of the smaract driver is now 10.0.53.10:5000 please think about putting such      25   Mon Oct 4 15:10:17 2021 Aurélien Martens Fixed report mechanics | detectors and electronics | software Optical room new position of smaract motors following the measuremetn at 879.9 MHZ of the laser theoptical cavity length has been adjusted to that value from 876MHz setting      26   Mon Oct 4 15:24:14 2021 Aurélien Martens Fixed report lasers and optics | detectors and electronics Optical room piezo actuation range A 10V applied on the laser piezo was found to induce a frequecny change of about 5kHz, compatible with expectations from the piezo      27   Mon Oct 4 15:38:43 2021 Aurélien Martens Fixed info detectors and electronics Optical room phone is noise doing the sensitivty measurement of the piezo we observed satellite peaks around 800 to 900 Mhz. Removing the phones from      28   Tue Oct 5 11:35:16 2021 Aurélien Martens Fixed report detectors and electronics | software Optical room new position of smaract motors a cavity length measurement gave 880.9Mhz. The m1/M2 have been put to +5.1000mm both M3/M4 srill at -2.9mm      29   Tue Oct 5 12:18:34 2021 Aurélien Martens Fixed report detectors and electronics | software Optical room new position of smaract motors to find the fundamental mode we moved the cavity mirrors to new positions: +5.104mm for both planar mirrors      30   Tue Oct 5 12:23:51 2021 Aurélien Martens Fixed report detectors and electronics | software Optical room new position of smaract motors the M1 is not at 5.1045mm to put the fundamental on the scanning range of the laser piezo M2 still at 5.104mm      31   Tue Oct 5 16:23:04 2021 Aurélien Martens Fixed report detectors and electronics | software Optical room new position of smaract motors after 3hours (1pm --> 4pm) the cavity moved by 12um in total new positions: +5.1065mm on M1      32   Tue Oct 5 18:24:53 2021 Ronic Chiche Fixed info lasers and optics Optical room Locking with fast analog loop on AOM in addition to the standard locking scheme with the GHz laser PZT, we added an AOM after the PDH modulation      33   Thu Oct 7 17:53:53 2021 Blanc Fixed info lasers and optics | detectors and electronics Optical room Finess and coupling measurement We did the measurement of the Finess and coupling with the NKT, with 2 EOM, without AOM (so the lock signal is noisy), on the      34   Fri Oct 8 16:02:19 2021 Blanc Fixed info lasers and optics | detectors and electronics Optical room Setup and measurements To summerize the results of this week : We made the setup in attachement 5 and align it to have the good mode in the      35   Tue Oct 19 18:27:20 2021 Ronic Chiche Fixed report mechanics | lasers and optics | detectors and electronics Optical room PZT resonant frequencies we have excited the PZT with a swept sinus wave from 1kHz to 10kHz and from 10kHz to 100kHz.      36   Wed Oct 20 12:36:15 2021 Ronic Chiche Fixed report lasers and optics Optical room Amplitude GHz oscillator phase noise with PZT effect 3 phase noise measurements made on the Amplitude GHz oscillator with different PZT configurations :      37   Wed Oct 20 14:54:00 2021 Ronic Chiche Fixed info lasers and optics | detectors and electronics Optical room Phase noise measurement of the Amplitude MIKAN MIKAN phase noise and RIN measurements:

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