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

An evaluation system and optical fiber ring technology, which is applied in the direction of testing optical performance, Sagnac effect gyroscope, etc., can solve the problems of failure to show, fiber optic ring testing, etc., and achieve targeted testing, simple structure, and more accurate testing Effect

An evaluation system and optical fiber ring technology, which is applied in the direction of testing optical performance, Sagnac effect gyroscope, etc., can solve the problems of failure to show, fiber optic ring testing, etc., and achieve targeted testing, simple structure, and more accurate testing Effect

CN101441129AInactive Publication Date: 2009-05-27HARBIN ENG UNIV
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  • Optical fiber ring performance measuring and evaluating system based on temperature experiment
  • Optical fiber ring performance measuring and evaluating system based on temperature experiment
  • Optical fiber ring performance measuring and evaluating system based on temperature experiment

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Embodiment Construction

[0025] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0026] Its composition includes broadband light source 1 for high-precision fiber optic gyro, polarization-maintaining fiber coupler 2, Y waveguides 3 and 4, fiber ring to be tested 5, fast temperature control test box 6, high-sensitivity optical power meter 7-9, for The computer and program 10-12 for receiving data from the computer serial port or GPIB port, several optical fiber connections, computer data lines, etc. Wherein, the output of the broadband light source 1 is connected to an input end 13 of the polarization maintaining fiber coupler 2, and the two output ends 14, 15 of the polarization maintaining fiber coupler are respectively connected to a Y branch end of two Y waveguides 3, 4, and the Y waveguide The single ends (polarizing ends) 16 and 17 of the fiber optic gyro to be tested are connected with the fiber optic ring 5, and the fiber optic ring and...

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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, ...

Claims

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Application Information

Patent Timeline
27 May 2009
Publication
CN101441129A
IPC
G01M11/02; G01C19/64
Inventors
李绪友; 于强