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Optical amplification based optical fiber Fizeau strain sensor FDM system and method

A strain sensor, frequency division multiplexing technology, applied in frequency division multiplexing system, optical waveguide coupling, multiplexing communication, etc., can solve the problems of weak signal and difficult multiplexing

Inactive Publication Date: 2004-12-08
饶云江
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Problems solved by technology

The fiber optic Fabry-Perot (F-P) sensor is widely used in engineering at present (see Henry Taylor's works, fiber optic sensors, New York: Maso Deke Publishing House, 2002, pp41 and papers by Rao Yunjiang et al., Acta Optics, 2002, 22: 85), but the F-P sensor has two inherent weaknesses, one is that the signal is weak, and the other is that it is difficult to multiplex

Method used

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  • Optical amplification based optical fiber Fizeau strain sensor FDM system and method
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  • Optical amplification based optical fiber Fizeau strain sensor FDM system and method

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Embodiment Construction

[0020] Specific implementation plan

[0021] The implementation structure of this system is shown in Figure 1. It consists of pump laser 3, wavelength division multiplexer 4, erbium-doped fiber 5, coupler 6, multiple parallel fiber Fizeau strain sensors 7, 8, 9, isolator 2 and spectrometer 1 compose the entire system. The pump light is input from the pump laser 3, enters the erbium-doped fiber 5 through the wavelength division multiplexer 4, and excites the erbium ions in the erbium-doped fiber 5 to generate amplified spontaneous radiation to form an ASE broadband light source. This ASE light source is the signal light of the system. The ASE light enters the optical fiber Fizeau sensor through the coupler 6 to produce multi-beam interference. The reflected signal is amplified by the erbium-doped fiber 5, and then passed through the wavelength division multiplexer 4 and isolator 2, and finally received by the spectrometer 1.

[0022] The structure of the optical fiber Fizeau strain...

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Abstract

The system is composed of pumping laser, wavelength division multiplexer optical fibre, coupler, transducer, isolator and spectrograph. In the method erbium-doped optical fibre and optical fibre Fizean strain transducer are applied, amplifying function of erbium-doped optical fiber is utilized to not only form wideband light source but also to amplify weak signal, frequency division multiplexing for above ten optical fibre Fizeau transducers can be realized based on above-mentioned function so two shortcomings of weak signal and difficult multiplexing on existing optical fibre Fabry-Perot transducer can be basically solved.

Description

Technical field: [0001] The invention belongs to the technical field of optical fiber sensors, and specifically relates to a frequency division multiplexing system and method for optical fiber Fizeau strain sensors based on optical amplification. technical background: [0002] With the development of modern measurement technology, optical fiber sensors have attracted more and more attention. Compared with traditional electrical sensors, optical fiber sensors have significant advantages such as immunity to electromagnetic interference, wide application range, high resolution, easy reuse, small size, and light weight. Therefore, in the past two decades, people have developed a variety of optical fiber sensors (see Eric Wood, Optical Fiber Sensors, New York: Masodko Press, 2002). As an extremely important and commonly used type of optical fiber sensors, optical fiber interference sensors have high resolution, large dynamic range, high accuracy, and flexible implementation methods co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00G02B6/42G02F1/39H04J1/00
Inventor 饶云江江建
Owner 饶云江
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