A kind of detection method of outer twist parameter of optical fiber

A detection method and optical fiber technology, which is applied in the direction of testing optical performance, etc., can solve problems such as measurement errors and sensor performance instability, and achieve high detection accuracy, low-torsion winding of optical fibers, and simple operation

Inactive Publication Date: 2015-10-28
ZHEJIANG UNIV
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Problems solved by technology

The optical fiber will be twisted during the process of making and winding into a loop, which will cause the polarization state of the light to change during the propagation of the fiber, resulting in unstable sensor performance and measurement errors

Method used

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  • A kind of detection method of outer twist parameter of optical fiber
  • A kind of detection method of outer twist parameter of optical fiber
  • A kind of detection method of outer twist parameter of optical fiber

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0018] Refer to attached figure 1 -3. The detection method of the external torsion parameter of the optical fiber is realized on the detection system of the external torsion parameter of the optical fiber. Array CCD7, CCD readout circuit 8, computer 9; The method includes the following steps:

[0019] 1) First, pull a section of the optical fiber to be tested from the entire optical fiber to be tested, so that it is in a suspended state. After the outer torsion is completely released, a non-twisted section 1 of the optical fiber to be tested is formed, and the A and B ends of the fiber are respectively fixed with optical clamps. 3 clamping and fixing.

[0020] 2) Set an inkjet machine 4 at the end B of the untwisted section 1 of the optical fiber to be tested, and make an ink dot at any point on the outer circumference of the B end of the untwi...

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Abstract

The invention discloses an optical fiber external torsion parameter detection method. First, a section of to-be-detected optical fiber is pulled to be in a suspended state, and points A and B at the two ends of a section of optical fiber without external torsion are clamped after external torsion is completely released; then, a section of optical fiber BC with equal length as the section AB is pulled and is clamped at a point C; and the point B is released and the torsion angle of the optical fiber at the point B is detected so as to obtain the optical fiber external torsion parameter: angle / length. The detection method of the invention is simple, easy in operation and high in precision and can be configured in an optical fiber winding machine online to detect optical fiber external torsion data online in the process of optical fiber winding.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method of an optical fiber external torsion parameter. Background technique [0002] As the main component of the sensing part of the sensor, the optical fiber plays an irreplaceable role in optical sensing; the optical fiber ring is a sensitive part in the angular rate sensor, and the stability of its performance directly affects the stability of the sensor's performance. The optical fiber will be twisted during the process of making and winding into a loop, which will cause the polarization state of the light to change during the propagation of the optical fiber, which will cause the instability of the sensor performance and bring measurement errors. Therefore it is very important to measure the twist of the fiber. Contents of the invention [0003] In order to realize the high-precision measurement of the external torsion of the optical fiber, the invention proposes a detec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
Inventor 王洁张彩妮刘承施飞韬
Owner ZHEJIANG UNIV
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