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Optical fiber mode coupling biochemical sensor, sensing device and sensing system

A chemical-biological and mode-coupling technology, applied in the fields of biology, chemistry, and optical fiber sensing, can solve problems such as weak environmental adaptability, difficulty in accurately determining the coupling center wavelength, and low resolution

Inactive Publication Date: 2006-05-10
重庆工学院
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Problems solved by technology

But this optical fiber biosensor also has some shortcomings: (1) The sensor and its sensing system adopt a single optical path intensity measurement method, and the fluctuation and interference of the light source, optical path and circuit system affect the reliability and accuracy of the sensing system
(2) The long-period fiber grating coupling wavelength band is wide and flat, and it is very difficult to accurately determine the coupling center wavelength, and its resolution is low
(3) Long-period fiber gratings are greatly affected by environmental temperature changes, and the environmental adaptability is weak, so constant temperature control is required for the sensor and the measured object

Method used

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  • Optical fiber mode coupling biochemical sensor, sensing device and sensing system
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  • Optical fiber mode coupling biochemical sensor, sensing device and sensing system

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Embodiment Construction

[0022] Taking the measurement of the protein concentration of human immunoglobulin G (IgG) as an example below, the implementation of the above-mentioned sensor, sensing device and sensing method thereof will be further described in conjunction with the accompanying drawings, and the chemical composition or biomolecules in the form of other gases or solutions can be measured. The implementation is similar, except that a different biomolecular or chemical composition-sensitive film is cured on the optical fiber cladding.

[0023] see figure 1 , The structure of the sensor includes: fiber coating layer 1, fiber cladding layer 2, fiber core 3, fiber Bragg grating FBG14, biomolecular sensitive film layer 5, long-period fiber Bragg grating LPFG 6, fiber Bragg grating FBG27, protective cover 8 , curing glue 9, transition buffer sleeve 10. Among them, the optical fiber material is quartz or plastic, and a long-period fiber grating with a length of about 20 mm is provided on a sectio...

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Abstract

The invention discloses a fiber coupling biochemical sensor, sensing apparatus and method for sensing. The sensor comprises a long period fiber grating, two Bragg fiber gratings, absorbing or sensing film layer which being on the fiber clad surface and being sensitive to chemical or biological molecule. The sensing apparatus comprises a broad band light source, fiber, broad band coupler, fiber coupling biochemical sensor, fiber spectrometer and a computer. The inventive apparatus realizes remote-measure basing on fiber link circuit, it also employs multiplex method to realize sensing of biological molecule, chemical constituent and temperature.

Description

technical field [0001] The invention belongs to the technical fields of optical fiber sensing, biology and chemistry, and in particular relates to an optical fiber mode coupling chemical biosensor, a sensing device and a sensing method thereof. Background technique [0002] Optical fiber chemical and biological sensor is a new type of sensing technology that was born in the mid-1970s. It solidifies substances that can identify and transduce chemical or biomolecules on optical fibers, and performs selective chemical or biomolecular recognition of the substances to be measured. , and then converted into various optical information to obtain chemical and biological information. In most sensors, the optical fiber only plays the role of light transmission, and some sensors are based on the effect of the measured substance on the properties of the fiber waveguide. The main characteristics of optical fiber chemical and biological sensors are that the sensor is miniaturized, lightw...

Claims

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Application Information

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IPC IPC(8): G01N21/41G01N33/48
Inventor 曾祥楷
Owner 重庆工学院
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