Differential-type circularly-polarized laser carrier communication system

A carrier communication and circular polarization technology, which is applied in the field of differential circular polarization laser carrier communication system, can solve the problems of communication efficiency reduction, limit the promotion and application of free space optical communication technology, achieve good compatibility, improve anti-interference ability, The effect of high modulation rate

Inactive Publication Date: 2013-11-20
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In order to solve the existing technology of laser signal transmission in the atmospheric channel, due to the influence of factors such as atmospheric turbulence and background light noise, the communication efficiency is greatly reduced, which greatly limits the promotion and application of free space optical communication technology Problem, the present invention provides a differential circularly polarized laser carrier communication system

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  • Differential-type circularly-polarized laser carrier communication system
  • Differential-type circularly-polarized laser carrier communication system
  • Differential-type circularly-polarized laser carrier communication system

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Embodiment Construction

[0013] The method of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0014] Such as Figure 1 to Figure 5 As shown, the differential circularly polarized laser carrier communication system of the present invention includes: a laser emitting end and a laser receiving end, and the laser emitting end includes a laser 1, a first beam splitter 2, a first modulator 3, and a second modulator 4. The first 1 / 4 wave plate 5, the optical transmitting lens 6 and the signal encoding module; the laser receiving end includes the optical receiving lens 7, the second 1 / 4 wave plate 8, the second beam splitter 9, the first receiving device 10, a second receiver 11 and a signal decoding module. The first beam splitter 2 includes a first polarization beam splitter 2-1, a first fiber coupling lens 2-2 and a second fiber coupling lens 2-3; the laser light emitted by the laser 1 is divided into Two beams of linearly polarized light w...

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Abstract

The invention relates to a differential-type circularly-polarized laser carrier communication system, which relates to the field of the laser communication of a free space. The system is mainly composed of a laser transmitting part and a laser receiving part. The laser transmitting part comprises a laser (1), a first beam splitter (2), a first modulator (3), a second modulator (4), a first quarter slide (5), an optical transmitting lens (6) and a signal encoding module; and the laser receiving part comprises an optical receiving lens (7), a second quarter slide (8), a second beam splitter (9), a first receiver (10), a second receiver (11) and a signal decoding module. The circularly-polarized laser is used as an information carrier, and a differential method is used for modulation and receiving, so that the interference resistance of the laser in the long-distance transmission in the atmosphere can be greatly improved.

Description

technical field [0001] The invention is mainly applied in the field of free space laser communication, and relates to a differential circularly polarized laser carrier communication system. Background technique [0002] Free space laser communication has the advantages of both microwave communication and optical fiber communication, and also has the advantages of large communication capacity, good confidentiality and simple installation. It has become the development trend of the future communication field. Many scientific research institutes at home and abroad have carried out a lot of research work on the development of the laser carrier communication field. However, due to the influence of factors such as atmospheric turbulence and background light noise during the transmission of laser signals in the atmospheric channel, the communication efficiency is greatly reduced, which greatly reduces the The promotion and application of free space optical communication technology ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/11H04B10/556G02B6/27
Inventor 耿天文王志乾刘绍锦李雪雷刘畅沈铖武李建荣王旻刘玉生
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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