An instantaneous frequency measurement scheme based on carrier phase-shifted double sideband modulation

Jun Liao; Jian Xu; Wanyu Liu; Yi Zhong; Keyu Shuai; Lin Guo

doi:10.1117/12.3046350

13 December 2024 An instantaneous frequency measurement scheme based on carrier phase-shifted double sideband modulation

Jun Liao, Jian Xu, Wanyu Liu, Yi Zhong, Keyu Shuai, Lin Guo

Author Affiliations +

Proceedings Volume 13502, AOPC 2024: AI in Optics and Photonics; 1350205 (2024) https://doi.org/10.1117/12.3046350
Event: Applied Optics and Photonics China 2024 (AOPC2024), 2024, Beijing, China

Abstract

A scheme for instantaneous frequency measurement (IFM) based on carrier phase-shifted double sideband (CPS-DSB) modulation is proposed. In the proposed scheme, two CPS-DSB modulations with different phase shifts are utilized, in conjunction with a dispersion device, an amplitude comparison function (ACF) is constructed by mapping the relation between the output power ratio of two photodetectors and the unknown frequency, therefore, the frequency measurement is achieved. Simulation results indicate that a frequency measurement range of 0.1–15.7 GHz with an error of less than 80 MHz is achieved, and the larger the slope, the smaller the measured error. In addition, by adjusting two phase shifts, a two-step frequency measurement is adopted by coordinated operation of a large range rough measurement and a small range precise measurement, the measured error of the unknown frequency can be improved significantly.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jun Liao, Jian Xu, Wanyu Liu, Yi Zhong, Keyu Shuai, and Lin Guo "An instantaneous frequency measurement scheme based on carrier phase-shifted double sideband modulation", Proc. SPIE 13502, AOPC 2024: AI in Optics and Photonics, 1350205 (13 December 2024); https://doi.org/10.1117/12.3046350

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KEYWORDS

Modulation frequency

Double sideband modulation

Phase shift keying

Phase shifts

Single mode fibers

Palladium

Modulation

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