Digital Control of Residual Amplitude Modulation for Ultra-Stable Optical Cavity
| Affiliation auteurs | !!!! Error affiliation !!!! |
| Titre | Digital Control of Residual Amplitude Modulation for Ultra-Stable Optical Cavity |
| Type de publication | Conference Paper |
| Year of Publication | 2020 |
| Auteurs | Talla S.FTetsing, Millo J., Denis S., Lacroute C., Goavec-Merou G., Rubiola E., Kersale Y. |
| Conference Name | 2020 JOINT CONFERENCE OF THE IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM AND INTERNATIONAL SYMPOSIUM ON APPLICATIONS OF FERROELECTRICS (IFCS-ISAF) |
| Publisher | IEEE; IEEE Ultrason Ferroelectr & Frequency Control Soc; Piezoresponse Force Microscopy; Toptica Photon; aixACCT Syst; SDI; Microchip; SCIA Syst; Radiant Technologies Inc |
| Conference Location | 345 E 47TH ST, NEW YORK, NY 10017 USA |
| ISBN Number | 978-1-7281-6430-4 |
| Résumé | In this work, we present a technique to control and reduce the residual amplitude modulation (RAM) in the cavity-stabilized laser, which is one of the main limitations of these systems. The RAM rises from polarization mismatch between electro-optic modulator (EOM) axis and polarizers implemented for the generation of the error signal by the Pound-Drever-Hall technique. Using digital control system, we have developed a simple and robust technique for an active reduction of the RAM acting on the temperature of the EOM in addition with a DC and high voltage applied accross the EOM crystal. We observe a reduction of the RAM to 0.25 ppm compatible with a fractional frequency stability in the low 1e(-16) around 10s. |