Fiber state detection method and system

Abstract

The invention discloses a fiber state detection method and system, and relates to the technical field of fiber detection. The method comprises: performing calculating on a standard fiber output light field image to obtain a standard value aperture histogram of a fiber output light field; through analyzing an acquired image of a fiber output light field to be detected, obtaining a value aperture histogram of the fiber output light field to be detected; and comparing the value aperture histogram of the fiber output light field to be detected with the standard value aperture histogram of the fiber output light field to obtain a state change of the fiber output light field to be detected. According to the invention, for the structural characteristics and optical waveguide characteristics of a multi-wrapping-layer fiber, the method is designed to realize detection of the state of the multi-wrapping-layer fiber. The method is applied to detection of fiber defects, bending states, loss parameters and the like, and can also realize real-time monitoring and feedback control of the multi-wrapping-layer fiber at the same time.

Description

technical field [0001] The invention relates to the technical field of optical fiber detection, in particular to an optical fiber state detection method and system. Background technique [0002] Compared with traditional single-clad fibers, the core and inner cladding of multi-clad fibers can simultaneously and independently conduct light waves. With the continuous development of optical fiber technology, multi-clad optical fiber has been widely and deeply used in various fields. In the process of application and experiment, we found that multi-clad fiber has different loss characteristics from traditional single-clad fiber, so that in the process of multi-clad fiber loss measurement, the traditional main measurement method is no longer applicable to multi-clad fiber. optical fiber. [0003] The loss measurement result of the traditional single-clad fiber is completely equivalent to the core loss of the single-clad fiber. First edition, pages 225-230) to obtain the attenu...

AI Technical Summary

Problems solved by technology

However, the detection result of its dark field detector is the change trend of the optical fiber cladding field, which has a large gap with the real cladding light field change curve.

It is impossible to establish a direct and accurate correlation between the detection results of the dark field detector and the actual cladding light field

Second, this double-clad fiber sensing scheme still causes damage to the fiber itself

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