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Hollow-core photonic bandgap fiber interferometer sensor, manufacturing device and method

A technology of optical fiber interferometer and photonic bandgap, which is applied to fluid pressure measurement, instruments, and measuring devices using optical methods, and can solve problems such as poor mechanical properties of structures, low air pressure sensitivity, and poor durability

Pending Publication Date: 2018-12-25
SHENZHEN UNIV
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Problems solved by technology

[0003] The main purpose of the present invention is to provide a hollow-core photonic bandgap fiber optic interferometer sensor, manufacturing device and method, which can solve the technical problems of poor durability, poor structural mechanical properties and low air pressure sensitivity of existing interferometer sensors

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[0029] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0030] Because existing interferometer sensors have poor durability, poor structural mechanics and low air pressure sensitivity technical problems in the prior art.

[0031] In order to solve the above technical problems, the present invention proposes a hollow-core photonic bandgap fiber optic interferometer sensor, manufacturing device and ...

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Abstract

The invention discloses a hollow-core photonic bandgap fiber interferometer sensor and a manufacturing device and method. The interferometer sensor comprises a first coupler, a second coupler, a firstoptical fiber, and a second optical fiber, wherein the first optical fiber and the second optical fiber are hollow-core photonic bandgap fibers; a first arm of the first coupler is connected to one end of the first optical fiber and the other end of the first optical fiber is connected to the first arm of the second coupler; and a second arm of the first coupler is connected to one end of the second optical fiber, the other end of the second optical fiber is connected to the second arm of the second coupler, and one end of the second optical fiber is provided with an air microcavity. The interferometer sensor uses a hollow-core photonic bandgap fiber which conducts light through photonic bandgap effects, and the guided mode energy is almost completely confined to transmission in a core. Therefore, the interferometer sensor manufactured by the optical fiber has the advantages of low insertion loss, low nonlinearity, insensitivity to environmental refractive index and bending disturbance, and can overcome the problems of poor mechanical structure, low durability, and low sensitivity.

Description

technical field [0001] The invention relates to the field of interferometer sensor preparation, in particular to a hollow-core photonic bandgap fiber (Hollow-core photonic bandgap fiber, HC-PBF) interferometer sensor, a manufacturing device and a method. Background technique [0002] The existing air pressure measurement technology uses a bubble to form a Fabry-Perot interferometer sensor at the end of a single-mode fiber, and its air pressure sensitivity is up to 1036pm / MPa (meaning 1036 picometers per megapascal), or it is welded at the end of a single-mode fiber A small section of hollow-core optical fiber is coated with a layer of nano-silver film or nano-graphene film to form a Fabry-Perot interferometer sensor. It is 39.4nm / kPa. The interferometer sensor made by this end surface air bubble or nano film plating method has poor durability and structural mechanical properties, because the nano film or air bubble connected to the end is easy to rupture, so it can only be ...

Claims

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Application Information

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IPC IPC(8): G01L11/02
CPCG01L11/025
Inventor 王英王义平毛淳
Owner SHENZHEN UNIV
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