90-degree spatial optical mixer with optimized polarization parameter configuration

A technology for optimizing configuration and polarization parameters, applied in optics, instruments, optical components, etc., can solve the problems of low mixing efficiency and achieve slow adjustment speed, accurate polarization state change, and good mechanism reliability

Active Publication Date: 2020-02-21
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0006] In order to solve the problem of lower mixing efficiency caused by the mismatch between local oscillator light and signal light polarization state

Method used

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  • 90-degree spatial optical mixer with optimized polarization parameter configuration

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Embodiment Construction

[0019] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the present invention has a 90° spatial optical mixer with optimized configuration of polarization parameters, which includes: local oscillator laser 1, first half-wave plate 2, quarter-wave plate 3, second half-wave plate A wave plate 4, a first polarization beam splitter 5, a third half-wave plate 6, a second polarization beam splitter 7 and a first rectangular roof prism 8, a first balance detector 9, a non-polarization beam splitter 10, the first Four-and-a-half wave plate 11 , third polarizing beamsplitter prism 12 , second rectangular roof prism 13 , second balanced detector 14 , rectangular prism 15 , polarization state detector 16 and polarization state controller 17 .

[0021] The center of the local oscillator light emitted by the local oscillator laser 1 is aligned with the center of the lower side of the f...

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Abstract

The invention discloses a 90-degree spatial optical mixer with optimized polarization parameter configuration, belonging to the field of wireless communication technology. The 90-degree spatial optical mixer aims to solve the problem of lowered mixing efficiency caused by the polarization state mismatch between a local oscillation light and a signal light in the existing 90-degree spatial opticalmixer. The mixer comprises a local oscillation laser, a first half-wave plate, a quarter-wave plate, a second half-wave plate, a first polarization beam splitting prism, and a third half-wave plate, asecond polarization beam splitting prism, a first right-angle roof prism, a first balanced detector, a non-polarization beam splitting prism, a fourth half-wave plate, a third polarization beam splitting prism, a second right-angle roof prism, a second balanced detector , a right-angle prism, a polarization state detector, and a polarization state controller. The 90-degree spatial optical mixer with optimized polarization parameter configuration of the present invention gains wide application prospects in the fields of inter-satellite, satellite-ground wireless laser communication, and the construction of an air-space-ground integrated information network.

Description

technical field [0001] The invention relates to a free space laser communication device, in particular to a space light 90° mixer with high degree of polarization matching, belonging to the technical field of wireless communication. Background technique [0002] Wireless laser communication is a research hotspot in the field of communication due to its characteristics of high speed, high capacity, good confidentiality, and strong anti-electromagnetic interference ability. Wireless laser communication is more suitable for wireless information transmission of inter-satellite links and satellite-ground links. The link distance is long, the channel electromagnetic interference is strong, and the system communication time is short. Compared with microwave communication, wireless laser communication is one of the main technical approaches to solve such communication problems, and has broad application prospects. [0003] Coherent laser communication is a very important research ...

Claims

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Application Information

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IPC IPC(8): G02B27/28H04B10/63
CPCG02B27/286H04B10/63
Inventor 南航佟首峰张鹏刘洋秦齐
Owner CHANGCHUN UNIV OF SCI & TECH
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