Device for detecting polarization-maintaining optical fiber

Abstract

The invention relates to a device for detecting polarization-maintaining optical fiber, belonging to the technical field of optical measurement and optical fiber sensing. The device comprises a light source, a polarizer, a light beam splitter, a light delayer, a light beam combiner, a light detector and a circuit. A linearly polarized light beam is provided by the light source; after the light beam passes through the optical fiber to be detected, the polarization state of the light beam is turned by an angle through the polarizer; then the light beam enters the light beam splitter and is divided into two light beams; one light beam is delayed by the light delayer and is combined in the light beam combiner for interference; the light detector receives the interfered light and converts the interfered light into electric signals; and finally the circuit processes the electric signals to obtain the conditions of all parts of the optical fiber. The invention has the advantages that the conditions of the polarization-maintaining optical fiber can be accurately, conveniently and rapidly detected and the realization of the application of the polarization-maintaining optical fiber in fields such as sensing and the like is facilitated.

Description

technical field [0001] The invention belongs to the technical fields of optical measurement and optical fiber sensing; in particular, it relates to the detection of polarization-maintaining optical fibers by using a distributed polarization crosstalk detection technology, so as to realize better application of the polarization-maintaining optical fibers in the field of sensing technologies. Background technique [0002] Polarization-maintaining optical fiber is an important medium for optical information transmission and processing. It is also an important device for optical sensing technology. A typical application of it in sensing is the core component of making angle sensors (also known as fiber optic gyroscopes)- - Fiber optic ring. [0003] The polarization-maintaining optical fiber ring is the core component of the optical fiber angle sensor (also known as the fiber optic gyroscope), and its winding quality directly determines the accuracy of the fiber optic gyroscope....

AI Technical Summary

Problems solved by technology

These are indirect reflections of the winding quality, and cannot directly monitor the influence of the winding process on the fiber performance

In the aspect of using distributed sensing means to detect the fiber ring, the more traditional method is to use BOTDR (Brillouin Time Domain Reflectometer) to detect the stress of the fiber ring, but the spatial resolution and sensing sensitivity of this method are low, and it is difficult to realize online Accurately monitor the quality of fiber optic rings

Finally, it is difficult to realize the thermal stress detection of the finished product after the optical fiber wrapping is completed.

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