The PSDAVLL signal detection with synchronous ferroelectric liquid crystal switching as a laser frequency stabilization method

G. Dudzik; J. Rzepka; K. M. Abramski

doi:10.1117/12.2262167

8 December 2016 The PSDAVLL signal detection with synchronous ferroelectric liquid crystal switching as a laser frequency stabilization method

G. Dudzik, J. Rzepka, K. M. Abramski

Author Affiliations +

Proceedings Volume 10159, Laser Technology 2016: Progress and Applications of Lasers; 1015912 (2016) https://doi.org/10.1117/12.2262167
Event: XIth Symposium on Laser Technology, 2016, Jastarnia, Poland

Abstract

In this paper we present the DAVLL (Dichroic Atomic Vapor Laser Lock) signals detection method for laser frequency stabilization which has been improved by synchronous detection system based on the surface-stabilized ferroelectric liquid crystal (SSFLC). The SSFLC cell is a polarization switch and quarter waveplate component and it replaces the well-known two-photodiode detection configuration known as the balanced polarimeter. The presented polarization switching dichroic atomic vapor laser lock technique (PSDAVLL) was practically used in VCSEL-based frequency stabilization system with vapor isotopes (⁸⁵,⁸⁷Rb) rubidium cell. The applied PSDAVLL method has allowed us to obtain a frequency stability of 2.7 × 10⁻⁹ and a reproducibility of 1.2 × 10⁻⁸, with a dynamic range ratio (DNR) of detected signals of around 81.4 dB, what is 9.6 dB better than obtained in the balanced polarimeter configuration. The described PSDAVLL technique was compared with 3-f (on the 3rd harmonic) and passive frequency stabilization methods. Additionally, the presented setup consists only one-photodiode detection path what reduces parasitic phenomena like offsets between photodiode amplifiers, amplifier gain changes due to ambient conditions, aging effects of electronic components etc. as a consequence leads to better frequency reproducibility, stabilization accuracy and less detection system sensitivity to ambient condition changes.

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G. Dudzik, J. Rzepka, and K. M. Abramski "The PSDAVLL signal detection with synchronous ferroelectric liquid crystal switching as a laser frequency stabilization method", Proc. SPIE 10159, Laser Technology 2016: Progress and Applications of Lasers, 1015912 (8 December 2016); https://doi.org/10.1117/12.2262167

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KEYWORDS

Laser stabilization

Signal detection

Rubidium

Modulation

Polarimetry

Polarization

Absorption

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