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Real-time phase measurement system and method based on double-optical-comb beat frequency

A phase measurement and dual-optical comb technology is applied in the field of real-time phase measurement systems based on the beat frequency of dual-optical combs. The effect of resolution

Active Publication Date: 2020-06-16
XIAN INSTITUE OF SPACE RADIO TECH
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However, since the spatial resolution of the interferogram cannot reach the micron level, the calibration matrix of the phase distortion cannot be obtained accurately

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  • Real-time phase measurement system and method based on double-optical-comb beat frequency

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[0048] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0049] With the development of ultrafast laser and mode-locked laser technology, optical frequency comb has become a new type of wide-spectrum light source, w...

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Abstract

The invention discloses a real-time phase measurement system and method based on double-optical-comb beat frequency. Two optical frequency comb lasers precisely controlled in a time-frequency domain are adopted to form a double-optical-path test system; and a real-time phase measurement method is designed and used for achieving real-time measurement of phase distortion of all channels of a liquidcrystal optical phased array antenna. A dispersion module performs spatial dispersion on test light, and real-time high-resolution detection of wavefront phase distortion of each channel of the liquidcrystal optical phased array antenna is realized by using the wide spectrum characteristic of an optical frequency comb light source. The tiny repetition frequency difference existing in the repetition frequency of the two optical frequency combs is utilized; the optical signal is down-sampled, and real-time high-resolution phase distortion detection is realized through high-precision time-frequency analysis. Therefore, a reliable basis is provided for realizing high-precision real-time phase compensation of phase distortion of the liquid crystal optical phased array, but also a foundation islaid for realizing application of a non-mechanical light beam deflection technology in space optical communication.

Description

technical field [0001] The invention belongs to the technical field of dual optical comb beat frequency, and in particular relates to a real-time phase measurement system and method based on dual optical comb beat frequency. Background technique [0002] With the development of space multi-beam laser communication, the Acquisition, Tracking and Targeting (ATP) system is developing in the direction of high integration and light weight. Therefore, the non-mechanical beam deflection technology based on optical phased array antenna has attracted extensive attention of researchers at home and abroad. It is the most promising beam deflection method with broad application prospects and huge market potential. [0003] The optical phased array antenna is mainly composed of liquid crystal optical phased array element and wave controller. Among them, the liquid crystal optical phased array element (LCOPA) is the core element of beam deflection. It is mainly based on the birefringence e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/0207G01M11/0271
Inventor 葛锦蔓李小军曾和平和新阳闫明王迪龚静文张武朱忠博蒋炜
Owner XIAN INSTITUE OF SPACE RADIO TECH
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