Optical fiber conical sensing probe head based on surface plasmon resonance and manufacturing method thereof

Abstract

The invention discloses an optical fiber conical sensing probe head based on surface plasmon resonance and a manufacturing method thereof. The sensing probe head comprises a single mode optical fiber,a metal-metal oxide composite film, a sensitive film, and a metal reflective film. The fiber core at the end of the single mode optical fiber is stretched into a conical probe. The metal-metal oxidecomposite film covers a conical waist surface of the conical probe. The sensitive film covers the surface of the metal-metal oxide composite film. The metal reflective film is disposed on an end faceat the end of the conical probe. In the preparation, first, the single-mode fiber is melted and coned; then the conical fiber is cut into two segments at the conical waist by using a fiber cutter to form two conical optical fiber probes; finally, the conical fiber probes are coated in turn. According to the optical fiber conical sensing probe head based on the surface plasmon resonance and the manufacturing method thereof, the structure is simple and the cost is low. A reflective structure allows the sensing probe to be extended into a specific working environment, which avoids direct contactbetween the measuring person and the object to be tested, thereby improving the safety.

Description

technical field [0001] The invention relates to the field of optical fiber sensing, in particular to an optical fiber tapered sensing probe based on surface plasmon resonance and a manufacturing method thereof. Background technique [0002] In the 1970s, optical fiber became an emerging optoelectronic technology material, which has many advantages such as small size, strong corrosion resistance, and strong anti-interference ability. Therefore, communication systems using optical fiber as a channel have gradually developed. In 1902, Wood discovered the phenomenon of surface plasmon resonance when doing diffraction grating experiments; in 1960, Stern and Farrell studied the conditions of surface plasmon resonance, and first proposed the concept of surface equal plasma waves; then Otto and Kretschmann successively used prisms and metal films Stimulate the surface plasmon resonance phenomenon; in 1933, R.CJorgenson and Yee of Washington University in the United States proposed t...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose an optical fiber tapered sensing probe based on surface plasmon resonance and its manufacturing method in view of the problems of traditional optical fiber sensors such as complex structure, large volume, and difficulty in use.

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