Spatial light to single-mode fiber coupling system based on laser nutation

A single-mode optical fiber and coupling system technology, applied in the field of laser communication, can solve problems such as spot imaging device errors, and achieve the effects of improved control speed and accuracy, low power consumption, and simple tracking methods

Active Publication Date: 2015-07-29
上光通信技术(上海)有限公司
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Problems solved by technology

With the development of domestic laser communication, some people in China have researched some coupling schemes, namely the coupling scheme based on the five-point tracking method and the coupling scheme based on the fine tracking method. The first scheme above is at the expense of tracking bandwidth, and the second scheme Spot imaging devices may be affected by platform vibration and introduce new errors

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  • Spatial light to single-mode fiber coupling system based on laser nutation

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with example and accompanying drawing, but should not limit protection scope of the present invention with this.

[0032] First please refer to figure 1 , figure 1 It is a block diagram of the overall structure of the automatic coupling system of laser nutation-based spatial light to single-mode fiber in the present invention. Depend on figure 1 Visible, the present invention is based on the automatic coupling system of the spatial light of laser nutation to the single-mode optical fiber by 1.5 μ m laser device 1, launch collimating mirror 2, vibration fast mirror (FSM1) 3, compensation fast mirror (FSM2) 4, chapter Moving fast mirror (FSM3) 5, receiving collimating mirror 6, 1.5μm single-mode fiber beam splitter 7, linear detector 8, ground receiving system 9, data acquisition unit 10, digital signal processing unit 11, display and storage unit 12 compositions.

[0033] The laser light emitted by ...

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Abstract

Provided is an automatic spatial light to single-mode fiber coupling system based on laser nutation. The system comprises a 1.5 micron laser, an emission collimating mirror, a vibration fast reflector, a compensation fast reflector, a nutation fast reflector, a reception collimating mirror, a 1.5 micron single-mode fiber splitter, a linear detector, a ground reception system, a data collection unit, a digital signal processing unit and a real time storage and display unit. The system is simple in structure, the tracking algorithm is simple, and spatial light can be coupled to the single-mode fiber in high efficiency. The 2D nutation fast reflector is used to complete nutation scanning of laser at the end surface of the single-mode fibers, the nutation fast reflector is used to track the laser nutation position in the real-time tracking algorithm, tracking errors can be obtained by observing change of optical power output by the single-mode fibers, and high-speed tracking can be realized.

Description

technical field [0001] The invention is mainly used in laser communication, especially for the ground receiving system part in laser communication. Background technique [0002] In inter-satellite laser communication, since the end face of the single-mode fiber is very small and is easily affected by factors such as satellite platform vibration, atmospheric turbulence, and thermal effects, the problem of high-efficiency coupling of space light to the single-mode fiber becomes a solution to the ground receiving fiber. The key problem of DPSK system. With the development of domestic laser communication, some people in China have researched some coupling schemes, namely the coupling scheme based on the five-point tracking method and the coupling scheme based on the fine tracking method. The first scheme above is at the expense of tracking bandwidth, and the second scheme Spot imaging devices may be affected by platform vibrations and introduce new errors. The advantage of the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/11
Inventor 陈卫标高建秋侯培培朱韧孙建锋
Owner 上光通信技术(上海)有限公司
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