Countershaft matching method for side elevation of polarization maintaining optical fibre and apparatus thereof

A polarization-maintaining fiber, side-view technology, applied in the field of information, can solve problems such as narrow range, insignificant changes, inability to accurately achieve matching polarization-maintaining fiber alignment, and achieve the effect of low cost and strong versatility

Inactive Publication Date: 2009-04-29
PEKING UNIV
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Problems solved by technology

When the POL method and PAS method are used to align the axis of the matched polarization maintaining fiber, since the difference between the refractive index of the stress zone and the cladding is very small, the change of the POL characteristic value curve and the PAS curve is not obvious, and the matched polarizatio

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  • Countershaft matching method for side elevation of polarization maintaining optical fibre and apparatus thereof
  • Countershaft matching method for side elevation of polarization maintaining optical fibre and apparatus thereof
  • Countershaft matching method for side elevation of polarization maintaining optical fibre and apparatus thereof

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[0043] The method of the present invention will be further described below in conjunction with the accompanying drawings and examples, but the implementation of the present invention is not limited to this:

[0044] The device of the present invention is such as figure 1 As shown, it includes an image imaging system, a computer, and an optical fiber adjustment control system; an image imaging system is connected to the computer through a data bus; an image imaging system includes a parallel light source, an observation plane, a prism, a CCD camera, and a video capture card; an optical fiber adjustment control system includes an optical fiber The clamp and the rotating motor, the optical fiber clamp is fixedly installed on the rotating motor, and the rotating motor is connected with the computer through a data cable.

[0045] The working process of the present invention is:

[0046] 1. Such as figure 1 As shown, the two polarization-maintaining optical fibers (7) to be aligned ar...

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Abstract

The invention discloses a method and a device for matching and aligning side-looking images of a polarization maintaining fiber, and belongs to the technical field of information and photoelectron. The method comprises the following steps: 1) central axes of two polarization maintaining fibers to be aligned are aligned in the same line; 2) one side of each of the fibers is illuminated by parallel light and light distribution series of the emergent light on the opposite side of each of the fibers is recorded; 3) the other side of each of the fibers is illuminated by parallel light which has an alpha angle with the parallel light in step 2) and light distribution series of the emergent light on the opposite side of each of the fibers is recorded; 4) according to the recorded light distribution series, cross correlation coefficients R1 and R2 of the two fibers in each illuminating direction are calculated respectively; and 5) one of the polarization maintaining fibers is rotated, step 2) to step 4) are repeated, and the aligning position is determined according to the cross correlation coefficients. The system comprises an imaging system, a data processing unit and a fiber control system. Compared with the prior art, the method can realize correct alignment of various polarization maintaining fibers, and has the advantages of strong commonality and low cost.

Description

technical field [0001] The invention relates to a polarization-maintaining optical fiber alignment method and a device thereof, in particular to a polarization-maintaining optical fiber side-view image matching alignment method and a device thereof, and belongs to the field of information (optoelectronics) technology. Background technique [0002] Polarization-maintaining fiber has strong polarization-maintaining ability for linearly polarized light, so it is widely used in the fields of coherent optical communication, fiber optic sensing and fiber optic gyroscope, and the polarization axis of polarization-maintaining fiber is the key to the application of polarization-maintaining fiber technology. [0003] Currently, there are two main methods for alignment of polarization-maintaining fibers: the extinction ratio alignment method and the side-view image alignment method. The extinction ratio alignment method uses linearly polarized light injected from one end of the polari...

Claims

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Application Information

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IPC IPC(8): G02B6/26G02B6/24
Inventor 廖旺王子宇
Owner PEKING UNIV
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