An array measurement system and method for an end-face optical fiber refractive index sensor
A technology of optical fiber refractive index and sensor array, which is used in the measurement of phase influence characteristics, instruments, and analytical materials, etc., can solve the problems of poor stability, low sensitivity, and complicated operation, and achieve the effect of improving performance, improving sensitivity, and improving stability.
Active Publication Date: 2020-06-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0004] The purpose of the present invention is to solve the problems of high cost, complicated operation, poor stability and low sensitivity in the prior art optical fiber sensor-based refractive index measurement method, and proposes an end-face optical fiber refractive index sensor array Measurement system and method
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[0027] The embodiments of the present invention will be further described below in conjunction with the drawings.
[0028] The invention provides an end-face type optical fiber refractive index sensor array measurement system, such as figure 1 As shown, it includes a broadband light source 1, a polarization controller 2, a vector network analyzer 3, an electro-optic modulator 4, an optical fiber circulator 5, an optical fiber splitter 6, an end-face optical fiber refractive index sensor array 7 and a detector 9. The broadband light source 1, the polarization controller 2, and the electro-optic modulator 4 are sequentially connected by optical fibers. The optical fiber circulator 5 includes three ports a, b, and c. Port a is connected to the output of the electro-optic modulator 4 through an optical fiber, port b is connected to the optical splitter 6 through an optical fiber, and port c is connected to the input of the detector 9 through an optical fiber. 端连接。 End connection. The...
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The invention discloses an end-face optical fiber refractive index sensor array measurement system and method. The system includes a broadband light source (1), a polarization controller (2), a vector network analyzer (3), an electro-optical modulator (4), An optical fiber circulator (5), an optical fiber splitter (6), an end-face type optical fiber refractive index sensor array (7) and a detector (9). The end-face type optical fiber refractive index sensor array (7) is formed by dividing a plurality of end-face type optical fiber sensors (8) into multiple paths through an optical fiber splitter (6). The end-face optical fiber sensor (8) is made by welding one end of a single-mode optical fiber to an optical fiber coated with a dielectric film, and cutting the other end flat. The present invention uses a measurement method combining optical signals and microwave signals to divide the signals into multiple channels and collect the signals of the two reflection end faces of the sensor in each channel, so as to achieve the purpose of measuring the refractive index, avoid the power fluctuation factor of the light source, and improve system stability.
Description
Technical field [0001] The invention belongs to the technical field of optical fiber sensing measurement, and specifically relates to the design of an end-face optical fiber refractive index sensor array measurement system and method. Background technique [0002] Optical fiber sensing technology started in 1977 and developed rapidly with the development of optical fiber communication technology. It is an important indicator of the degree of informatization of a country. At present, optical fiber sensing technology has been widely used in military, national defense, aerospace, industrial and mining enterprises, energy and environmental protection, industrial control, medicine and health, measurement and testing, construction, household appliances and other fields. There are hundreds of optical fiber sensing technologies in the world, such as temperature, pressure, flow, displacement, vibration, rotation, bending, liquid level, speed, acceleration, sound field, current, voltage, m...
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IPC IPC(8): G01N21/41
CPCG01N21/41G01N2201/0833
Inventor 冉曾令黄经纬王亚鑫张爽刘文飞邹孟霖饶云江
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA