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Optical fiber Bragg grating sensor making method

A technology of fiber optic Bragg and grating sensors, which is applied in light guides, optics, instruments, etc., can solve the problems of inability to measure the thickness of microbial films online, and achieve high stability, high precision, and improved sensitivity

Inactive Publication Date: 2009-03-11
重庆工学院
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Problems solved by technology

[0007] Aiming at the defect that the prior art cannot measure the thickness of microbial film on-line, the technical problem to be solved by the present invention is to provide a manufacturing method of a fiber Bragg grating sensor, which can measure the thickness of microbial film on-line

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  • Optical fiber Bragg grating sensor making method
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  • Optical fiber Bragg grating sensor making method

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Embodiment Construction

[0034] see figure 1 , figure 2 , image 3 , Figure 4, Figure 5 and Image 6 , a kind of manufacture method of fiber Bragg grating sensor, manufacture step is:

[0035] The first step: the making of fiber Bragg grating: select photosensitive single-mode fiber 8, described photosensitive single-mode fiber 8 is made up of fiber core 1, cladding 2 and fiber coating layer 3, selects the diameter of described fiber core 1 to be about 3 μm-4 μm, using phase template technology, using a KrF excimer laser as an ultraviolet light source to write a fiber Bragg grating 6 with a period of 0.530 μm and a grid number of 20,000 in the photosensitive single-mode fiber 8; during the writing process Among them, use a spectrum analyzer 11 with a wavelength range of 600nm-1700nm and a resolution greater than or equal to 0.01nm to monitor the resonance center wavelength and resonance peak intensity of the grating, and it is optimal when the reflectance of the resonance center wavelength is abov...

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Abstract

The invention is an optical fiber Prague grating sensor, characterized in that it is made by the steps of: (1) making optical fiber Prague grating; (2) making D-type section of the optical fiber Prague grating; (3) selecting rectangular ceramic substrate wider than 2cm, making two semicircular grooves at the two ends of the ceramic substrate, respectively, to fix two end points of photosensitive single-mode optical fiber in the ceramic substrate, then making an optical fiber groove to store the D-type optical fiber Prague grating in the center of the ceramic substrate by laser machining technique, where the diameter of the optical fiber groove is somewhat greater than that of the optical fiber; (4) installing the D-type optical fiber Prague grating; and (5) placing the ready-made D-type optical fiber Prague grating in the optical fiber groove and making the Prague grating located in the center of the ceramic substrate and simultaneously under the monitoring of high power microscope, assuring a plane of the D-type optical fiber Prague grating and the top end surface of the ceramic substrate are basically on the same horizontal.

Description

technical field [0001] The invention relates to a manufacturing method of an optical fiber sensor, in particular to a manufacturing method of an optical fiber Bragg grating sensor capable of measuring the thickness of microbial film on-line. Background technique [0002] Microorganisms with bacteria as the main body will form a microbial film on the surface of the carrier as long as there is a carrier attached to the growth under suitable environmental conditions. People introduce microbial film into industrial organic waste gas treatment through artificial reinforcement technology, thus forming a biofilm reactor. The degradation rate of biofilm reactor to organic waste gas is related to the thickness and density of microbial film in the reactor, and the composition etc.; the total thickness of general biofilm is between 0.07mm and 4mm, and in the treatment of low-concentration organic waste gas (VOCs), the appropriate thickness of microbial film is generally between 70μm an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/124G01B11/06
Inventor 赵明富廖强罗彬彬刘江华陈艳
Owner 重庆工学院
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