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Polarization debugging device based on optical fiber torsion

An optical fiber and polarization technology, which is applied in the field of debugging devices, can solve the problems of high price, limited popularization and use, and high performance requirements of polarization-maintaining optical fibers, and achieve the effect of avoiding calibration

Inactive Publication Date: 2012-02-22
HARBIN ENG UNIV
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Problems solved by technology

High birefringence polarization-maintaining fiber has a good polarization-maintaining effect. This method has high requirements on the performance of polarization-maintaining fiber and other polarization-maintaining optical devices, and the manufacturing process of polarization-maintaining fiber devices is complicated and expensive. limit

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  • Polarization debugging device based on optical fiber torsion
  • Polarization debugging device based on optical fiber torsion
  • Polarization debugging device based on optical fiber torsion

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Embodiment Construction

[0016] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0017] combine Figure 1~6 , the optical fiber torsion mechanical device 12 is composed of an optical fiber fixed platform 1, a rotating shaft 3, a stepping motor 4, a stepping motor rotating shaft 5, a bracket 2, a bearing seat 6, a rolling bearing 7, gears 8, 9, a coupling 10 and a base 11 compositions.

[0018] 1. In order to avoid the introduction of stress effects other than fiber torsion, the optical fiber is fixed on the optical fiber fixing platform 1 and the rotating shaft 3 with acrylate reactive glue, and the upper surfaces of the optical fiber fixing platform 1 and the rotating shaft 3 are on the same level.

[0019] 2. The rolling bearing 7 is fixed by the bearing seat 6, which can drive the rotating shaft 3 to rotate, and the rotation angle is not limited by the mechanical structure.

[0020] 3. A through hole is designed in the rotating shaft 3, w...

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Abstract

The invention aims to provide a polarization debugging device based on optical fiber torsion, which comprises an optical fiber fixing platform, a bracket, a rotary shaft, a stepping motor, gears and a base, wherein both the optical fiber fixing platform and the bracket are fixed on the base; both the rotary shaft and the stepping motor are installed on the bracket; the rotary shaft is connected with the first gear by a rolling bearing; the stepping motor is connected with the second gear by a coupler; and the first gear and the second gear are mutually meshed. The polarization debugging device does not adopt a spatial optical path, and therefore, the problems of complex spatial optical path calibration and energy loss for coupling the spatial optical path to an optical fiber system can be solved. The stepping motor is used for driving the optical fiber torsion, giving feedback according to the state of an output signal, and controlling the torsion state of the optical fiber, and therefore the polarization state can be automatically regulated.

Description

technical field [0001] The invention relates to a debugging device in the field of optical fiber technology. Background technique [0002] The problem of "polarization-induced signal fading" has been raised a long time ago, and a lot of research has been done at home and abroad, and many solutions have been reported. The current solutions include polarization controller method, feedback control method, polarization state modulation method, diversity detection method, polarization maintaining fiber method, Faraday rotating mirror method and so on. There are various structures of polarization controllers. The waveplate-type polarization controller consists of three waveplates and is based on free-space transmission. This method is mature in technology and widely used, but it is not conducive to the application of optical fiber systems. In 1980, H.C.Lefevre first proposed an all-fiber polarization controller based on the same principle as the three-wave plate polarization co...

Claims

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Application Information

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IPC IPC(8): G01B9/02
Inventor 梁艺军姜岩张巧萍
Owner HARBIN ENG UNIV
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