Analytical method for biochemical sensors based on tandem LPWG

A biochemical sensor and analysis method technology, applied in the field of qualitative and quantitative analysis models in the biochemical sensing mechanism, can solve the problems of limited detection range, inability to complete quantitative, biochemical detection problems, etc., and achieve high sensitivity, far-reaching practical significance, and low cost. Effect
CN104596958BInactive Publication Date: 2017-06-09UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2017-06-09
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses an analysis method of a biochemical sensor based on a series LPWG. By utilizing the coupling characteristics of the LPWG, light in a certain bandwidth range centered on the resonant wavelength in the incident light wave is coupled into the measured envelope through the LPWG1, and then passes through the LPWG2. This part of the light is coupled into the waveguide core layer, and the output is interfered with the fundamental mode propagating in the same direction in the waveguide core layer. When the measured substance changes, the resonance wavelength in the output spectrum will shift, and the measured substance concentration can be calculated by detecting the offset. Analyze the absorption spectrum signal of the liquid in the output spectrum to realize the characterization of the measured substance. On the one hand, the method of the invention solves the problem that traditional biochemical sensors rely on a specific sensitive film with high price and a single detection index to be qualitative; limit problem.
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Description

technical field

[0001] The invention belongs to the fields of integrated optics, biophotonics and spectrum analysis, and specifically relates to the mode coupling and transmission characteristics of long-period waveguide gratings, and qualitative and quantitative analysis models and methods in biochemical sensing mechanisms. Background technique

[0002] At present, for the biochemical sensors developed at home and abroad, whether they are based on electrochemical principles, microfluidic technology or optical principles for detection, biochemical sensitive films are usually deposited on the contact surface between the device and the measured substance. The adsorption of specific substances by the membrane or the physical and chemical changes with them are used to select and distinguish the measured substances, and larger prisms and optical circulators are required. This design scheme not only increases the design complexity of the device, but also increases the size and cos...

Claims

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