Study of phase-sensitive heterodyne locking

Peng Yang; Xuezhi Ke; Lei Zhang; Guozhen Hu

doi:10.1117/12.2604287

1 November 2021 Study of phase-sensitive heterodyne locking

Peng Yang, Xuezhi Ke, Lei Zhang, Guozhen Hu

Proceedings Volume 12057, Twelfth International Conference on Information Optics and Photonics; 120570R (2021) https://doi.org/10.1117/12.2604287
Event: Twelfth International Conference on Information Optics and Photonics, 2021, Xi'an, China

Abstract

Traditional locking techniques, such as PDH (Pound-Drever-Hall), HC (Hansh-Couillaud), spatial mode interference technique, offset sideband locking technique, quantum noise locking, etc., have been widely applied to laser frequency stabilization and precision optical interferometry measurement. Here, a new technique, which we call phase-sensitive heterodyne locking (PSHL), is investigated by use of frequency-synthesized light to obtain a phase-sensitive high-frequency photoelectric readout to lock the phase of a squeezed light. Comparing with above techniques, there are several kinds of advantages for PSHL to be advocated. Frequency-synthesized light, which allows arbitrary control of the amplitudes and phases of the modulation sidebands relative to the carrier, is derived by the AOM (acousto-optic modulator), not the EOM (electro-optic modulator). Interferometic signals coming from a balanced heterodyne detector are high-frequency AC photoelectric current which can easily get rid of low-frequency classical noise and lead to reach or break through the shot noise limit. A theoretical derivation of the PSHL error signal and the associated stability of the squeezed and anti-squeezed lock points will be carried out in this work.

Citation Download Citation

Peng Yang, Xuezhi Ke, Lei Zhang, and Guozhen Hu "Study of phase-sensitive heterodyne locking", Proc. SPIE 12057, Twelfth International Conference on Information Optics and Photonics, 120570R (1 November 2021); https://doi.org/10.1117/12.2604287

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