Optical fiber ring performance measuring and evaluating system based on temperature experiment

Abstract

The invention provides a temperature experiment based fiber ring characteristics testing system, which is composed of a wide-spectrum light source for high-precision fiber gyroscope (1), a polarization-maintaining coupler (2), Y-shaped waveguides (3,4), a fiber ring to be tested (5), a quick temperature control testing box (6), high-sensitivity optical power meters (7,8,9), computer and software (10.11, 12) for data reception of computer serial port or GPIB port. The invention provides a fiber ring characteristics testing method without circuit matching based on temperature excitation experiment, which comprises: reflecting the influence of temperature change to optical signal polarization according to change of output power polarized by the Y-shaped waveguide, detecting symmetry of output signal at two ends of the fiber ring by a symmetric optical path, and detecting the influence of thermal nonreciprocal phase shift to interference effect. When applying the same testing device and testing method, the invention is capable of providing comparative index value with reliable quality of the fiber ring, and providing standard for selecting high-performance fiber ring.

Description

(1) Technical field [0001] The invention relates to a test system, in particular to an evaluation and screening system for an optical fiber ring used in an optical fiber gyroscope. (2) Background technology [0002] As a new type of angular rate sensor, Fiber Optic Gyroscope has the characteristics of small size, light weight, impact resistance, high precision, and long life. It has broad application prospects in the fields of control and navigation. In recent years, fiber optic gyroscope research has been carried out rapidly in some universities, national laboratories and companies. With the continuous deepening of research, the requirements for the accuracy and stability of fiber optic gyroscopes have also increased. The stability of fiber optic gyroscopes has always been an important factor affecting the further development of high-precision fiber optic gyroscopes, especially the long-term drift of the output of the gyroscope system with changes in ambient temperature, ...

AI Technical Summary

Problems solved by technology

These methods directly reflect the overall performance of the gyroscope under certain conditions, including the comprehensive effect of the optical path and the circuit, but fail to show the influence of the temperature gradient, which has a serious impact on the fiber optic gyroscope, on the gyroscope fiber ring, especially not Testing against the fiber optic ring itself

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