camilla derossi – Finesse 3

how to simulate INJ loops effects on the modulation noise?

2023-07-14 at 16:18 (last edited 2023-07-14 at 16:18)

Hi! We are observing an excess of frequency noise on the sidebands, which is apparently due to laser noise being shifted by the modulation through an EOM We would like to try to simulate this, adding some frequency noise on the laser and modulating it. In particular, we would like to add some noise around […]

Changing the Schnupp Asymmetry in the finesse-virgo model

287 Maddalena Mantovani, Jacques Ding, camilla derossi, Eleonora Capocasa, Monica Seglar-Arroyo, Michele Valentini, Enzo Tapia and Riccardo Maggiore 1 revision

2023-06-08 at 16:23 (last edited 2023-06-08 at 16:32)

This is a simple snippet of code showing how to change the Schnupp asymmetry in the finesse3 virgo model. The process is quite straightforward and is based on simply changing the length of the space between the beamsplitter and one of the compensation plates. An important step to follow the Schnupp asymmetry change is to […]

DARM_RF_to_DC — bug fixed in DC offset setting

272 Maddalena Mantovani, Jacques Ding, Eleonora Capocasa, Monica Seglar-Arroyo, Michele Valentini, camilla derossi and Riccardo Maggiore 2 revisions

2023-06-08 at 13:49 (last edited 2023-06-08 at 16:23)

We found an issue in the function DARM_RF_to_DC(dc_offset = XX), The DC offset given as an input to the function was wrongly dived by two, within the function . This has been fixed by Riccardo.

Bug in DARM_RF_to_DC with a selection of offset

270 Maddalena Mantovani, Michele Valentini, Jacques Ding, camilla derossi, Enzo Tapia, Monica Seglar-Arroyo and Eleonora Capocasa

2023-06-08 at 11:59

For an offset of about 1~5mW we can still lock the ITF in a working point, we know for a very small offset this does not holds i.e. 0.1mW, but when an offset of 0.2mW is selected it crashes.