Fiber bragg grating (FBG) sensing demodulation device and method based on reflective semiconductor optical amplifier (RSOA)

A sensing solution and sensor technology, applied in the field of FBG sensing and demodulating devices, can solve the problems of high cost, complex manufacturing process, and low tuning speed, and achieve the effects of stable performance, simple manufacture, and long tuning range

Active Publication Date: 2012-08-22
GUANGDONG FUAN TECH DEV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the thermal tuning method is limited by the response speed of the thermal effect, and the tuning speed is relatively slow, so it is difficult to realize high-speed dynamic measurement of the FBG sensor
The fiber F-P cavity length tuning method is to coat the fiber end face with a high-reflection film, use the fiber end face to form an F-P cavity, and tune the F-P cavity length to realize th...

Method used

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  • Fiber bragg grating (FBG) sensing demodulation device and method based on reflective semiconductor optical amplifier (RSOA)
  • Fiber bragg grating (FBG) sensing demodulation device and method based on reflective semiconductor optical amplifier (RSOA)
  • Fiber bragg grating (FBG) sensing demodulation device and method based on reflective semiconductor optical amplifier (RSOA)

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Embodiment Construction

[0027] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] Such as figure 2 , 3 As shown, the present invention provides a RSOA-based FBG sensing demodulation device, including a tunable laser, and the tunable laser includes a reflective semiconductor optical amplifier RSOA, an optical coupler and a tunable fiber grating FBG unit connected in sequence .

[0029] Wherein, the device further includes an optical circulator connected with the optical coupler.

[0030] Wherein, the device includes a photodetector connected with the optical circulator.

[0031] Wherein, the device also includes a processing and control unit, an adjustable power supply connected to the tunable FBG unit, the processing and control unit is used...

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Abstract

The invention discloses a fiber bragg grating (FBG) sensing demodulation device based on a reflective semiconductor optical amplifier (RSOA). The FBG sensing demodulation device comprises a tunable laser, an optical circulator, a photoelectric detector and a processing and control unit, wherein the tunable laser comprises the RSOA, an optical coupler and a tunable FBG unit in sequential connection. The invention also discloses an FBG sensing demodulation method based on the RSOA. The sensing demodulation device and the sensing demodulation method realize the FBG sensing demodulation with the advantages of high speed, low cost and simple structure.

Description

technical field [0001] The invention relates to the technical field of FBG sensing demodulation, in particular to an FBG sensing demodulation device and method. Background technique [0002] Optical sensing, especially optical sensing based on fiber grating technology, is currently used in many fields such as civil engineering, petroleum, electric power, transportation, mining, medicine, etc. field has been widely used. The structure of fiber grating sensing and demodulation system based on tunable laser is as follows: figure 1 As shown, it generally consists of tunable laser, FBG (Fiber Bragg Grating, fiber Bragg grating, referred to as fiber Bragg grating) sensor (FBG1 ~ FBG4), photodetector and optical passive device ( figure 1 In the optical coupler) and other parts. Among them, the physical quantity to be measured encodes the wavelength of the reflected light through the FBG sensor. The narrow-band optical signal sent by the tunable laser is coupled by an optical cou...

Claims

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Application Information

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IPC IPC(8): G01D5/26
Inventor 张治国陈雪张民王立芊
Owner GUANGDONG FUAN TECH DEV
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