Preparation method for fabry-perot sensor based on corroded high doping optical fiber

A production method and high-doping technology, which is applied in the direction of transmitting sensing components with optical devices, can solve the problems of poor mechanical strength, small fiber diameter, and difficult welding of FAP sensors, and achieve low cost, reduced corrosion, and The effect of reducing the corrosion rate

Inactive Publication Date: 2010-12-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Moreover, after the cladding is corroded, the diameter of the optical fiber is very small, which leads to difficulty in welding and poor mechanical strength of the fabricated FAP sensor.

Method used

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  • Preparation method for fabry-perot sensor based on corroded high doping optical fiber
  • Preparation method for fabry-perot sensor based on corroded high doping optical fiber
  • Preparation method for fabry-perot sensor based on corroded high doping optical fiber

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[0023] Schematic diagram of the production process of the optical fiber FAPO sensor based on corroding highly doped optical fibers. Figure 1 ~ Figure 3 shown. First, a 40% by mass hydrofluoric acid solution and a 35% by mass hydrochloric acid solution were formulated into a corrosion solution with a total volume of 60 mL at a volume ratio of 3:1. The highly doped fiber adopts erbium-doped single-mode fiber from Nufern Company, the model is EDFC-980-HP. Cut the end face of the erbium-doped fiber flat, such as figure 1 As shown above, put in the etching solution for etching. After 25 minutes, take out the corroded erbium-doped optical fiber and soak it in deionized water for about 20 minutes to wash off the residual corrosion solution, then place it in a dust-free environment to dry, or dry it with a hair dryer before use. The core part of the fiber end face will be corroded into a micropore, and the actual etched three-dimensional profile of the fiber end face is as follows...

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Abstract

The invention discloses a preparation method for a fabry-perot sensor based on a corroded high doping optical fiber. The preparation method comprises the following steps: soaking the end face of the high doping optical fiber into a corrosive liquor for corrosion so as to form micropores on the end face; and welding the micropores of two corroded optical fiber oppositely, or welding the microporesof one corroded optical fiber with the end face of a monomode optical fiber to form the optical fabry-perot sensor. A mixed liquor of hydrofluoric acid and strong inorganic acid is taken as the corrosive liquor; the used optical fiber is a fiber core high doping optical fiber; the high doping concentration further increases the corrosion rate difference between a cladding and the fiber core; the strong inorganic acid in the corrosive liquor reduces the concentration of the hydrofluoric acid, reduces the corrosion rate of the corrosive liquor on the cladding, reduces the corrosion of the cladding while simultaneously improving the corrosion depth of the fiber core, and consequently greatly improves the mechanical properties of the welded fabry-perot sensor.

Description

technical field [0001] The invention relates to an optical fiber sensor, in particular to a method for manufacturing a Fappaure sensor based on corroding highly doped optical fibers. Background technique [0002] Fiber optic FAP sensors have been widely used in many fields such as industry and military for sensing parameters such as strain, pressure, temperature, and refractive index, and are divided into intrinsic and extrinsic FAP sensors. The extrinsic fiber optic FAP sensor (EFPI) refers to the FAP cavity formed by the fiber end face and the air interface as the reflecting surface, and has the sensing characteristics that are sensitive to a certain physical or chemical parameter. The traditional EFPI sensor mainly aligns and fixes two sections of single-mode fiber by fusing a section of hollow fiber, or hollow capillary, or hollow photonic crystal fiber, or directly using a hollow sleeve between two sections of single-mode fiber. The EFPI sensor formed in this way is lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/26
Inventor 龚元饶云江郭宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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