Surface plasma resonance sensor based on photonic crystal fiber

A photonic crystal fiber, surface plasmon technology, applied in the field of ion resonance sensor, can solve problems such as unseen mature products, technical reports, etc., and achieve the effect of real-time monitoring of the dynamic process of the reaction, compact structure, and excellent transmission characteristics

Inactive Publication Date: 2012-02-15
TIANJIN UNIV
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  • Surface plasma resonance sensor based on photonic crystal fiber
  • Surface plasma resonance sensor based on photonic crystal fiber
  • Surface plasma resonance sensor based on photonic crystal fiber

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Embodiment Construction

[0016] The surface plasmon resonance sensor based on photonic crystal fiber refers to the deposition of metal nanoparticles or nanofilms on the inner wall of the air hole near the core in the photonic crystal fiber. The air hole in the cladding can be directly used as a microfluidic channel without having to be like a traditional fiber. Etch away the cladding or taper. In addition, the effective refractive index of the conduction mode can be changed by adjusting the structure of the photonic crystal fiber, the size of the air hole, etc., so as to facilitate the phase matching between the core conduction mode and the plasma mode. When the microfluid flows through the cladding pores of the coating, the change of the refractive index value of different substances can cause the change of the transmission loss peak, and this process can be detected in real time.

[0017] The technical solution adopted by the present invention to solve the technical problem is: a photonic crystal fi...

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Abstract

The invention relates to the field of fiber sensing and biological microfluidic detection and provides a fiber sensor with high sensitivity and small coupling loss. A technical scheme employed in the invention is as follows: the surface plasma resonance sensor based on photonic crystal fiber comprises a continuous broadband light source, a fiber coupling output assembly, an SMA905-to-FC interface jumper, a fiber coupling assembly, a photonic crystal fiber and a spectral detection unit, wherein, one end of the photonic crystal fiber is connected with the fiber coupling assembly, the other end of the photonic crystal fiber is connected with the spectral detection unit, the end of SMA905 interface of the SMA905-to-FC interface jumper is connected with the continuous broadband light source and the fiber coupling output assembly, and the end of FC interface of the SMA905-to-FC interface jumper is connected with the fiber coupling assembly through a flange. The invention is mainly applied for biological microfluidic detection.

Description

technical field [0001] The invention relates to an optical fiber sensor, in particular to a photonic crystal optical fiber surface plasmon resonance sensor. Background technique [0002] Optical fiber sensors have the advantages of high sensitivity, strong anti-interference ability, simple structure, bendable optical path, and easy miniaturization. They have very broad application prospects in biochemical reaction monitoring and detection. However, the optical fiber sensor using ordinary optical fiber as the sensitive element has several insurmountable shortcomings such as large coupling loss, poor polarization maintenance and cross-sensitivity problems, which limit the further improvement of sensor performance. The sensor based on photonic crystal fiber is a kind of fiber optic sensor. Compared with ordinary optical fiber, photonic crystal fiber has a series of excellent characteristics, such as multi-dimensional structure, wide tuning range, large mode field area, and mult...

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Application Information

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IPC IPC(8): G01N21/55G01N21/552
Inventor 姚建铨邴丕彬陆颖伏祥勇
Owner TIANJIN UNIV
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