Spectral ratio self-adaption control spatial light 90 degrees mixer

Abstract

The invention discloses a spectral ratio self-adaption control spatial light 90 degrees mixer, belongs to the technical field of wireless communication, and aims to solve the problems that the fixation of the existing spatial light 90 degrees mixer spectral ratio causes that the communication reception sensitivity is low, coherent communication flexibility is poor and the like. The mixer comprises a first 1 / 4 wave plate, a rotatable 1 / 2 wave plate, a Wollaston prism, a collimator, a second 1 / 4 wave plate, a first mirror, a second mirror, a first 1 / 2 wave plate, a second 1 / 2 wave plate, a first polarization beam prism, a third 1 / 2 wave plate, a fourth 1 / 2 wave plate, a second polarization beam prism, a first convergence lens, a second convergence lens, a third convergence lens, a fourth convergence lens, a first balanced detector, a second balanced detector, a multiplier, a communication signal processing module, an optical phase lock loop, an intrinsic light source, a driver and a controller. The spectral ratio self-adaption control spatial light 90 degrees mixer has the advantages of improving the communication sensitivity; reducing the bit error rate; increasing the phase lock probability, and reducing the phase lock time.

Description

technical field [0001] The invention relates to a spatial light 90° mixer device which reduces the communication bit error rate and improves the phase locking probability, and belongs to the technical field of wireless communication. Background technique [0002] Laser wireless communication is a very important communication method in the field of wireless communication because of its advantages such as large communication capacity, high transmission rate, good confidentiality, strong anti-electromagnetic interference ability, light weight, small size, and low power consumption. In the field of high-speed wireless communication between ground and satellites, occasions that require high security and confidentiality of communication content (such as government, military department, security department), or places with strong electromagnetic interference (such as battlefields) and many other occasions have potential application prospects. [0003] Coherent laser communication,...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low communication receiving sensitivity and poor coherent communication flexibility caused by the fixed splitting ratio of the existing spatial light 90° mixer, the present invention proposes a flexible and self-adaptive control of the splitting ratio of the spatial light 90 ° Mixer

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