Modular interface temperature sensor of liquid-core optical fiber

Abstract

The invention provides a modular interface temperature sensor of a liquid-core optical fiber, belongs to the field of optics, and aims at solving the problem that the liquid is injected into a hollow optical fiber or photonic crystal fiber to prepare a high-sensitivity temperature sensor in the prior art. The modular interface temperature sensor comprises an ASE broadband light source, a temperature sensitive module and a spectrum analyzer; a beam outputted by the ASE broadband light source is incident into the temperature sensitive module; the beam outputted by the temperature sensitive module is incident into the spectrum analyzer; the temperature sensitive module comprises an incident end single-die optical fiber, the liquid-core optical fiber and an outgoing end single-die optical fiber; the liquid-core optical fiber consists of a liquid fiber core and a quartz cladding layer; the base die light transmitted by the incident end single-die optical fiber is spread to the incident part of the liquid-core optical fiber and divided into two parts, one part is spread through the liquid fiber core of the liquid-core optical fiber to form a fiber core die B1, and while another part is spread along the quartz cladding layer to form a cladding layer die B2; the fiber core die B1 and the cladding layer die B2 are spread to the outgoing end of the liquid-core optical fiber to be combined again and then transmitted into the incident end single-die optical fiber to generate modular interface.

Description

technical field [0001] The invention relates to a temperature sensor in the field of measurement technology, in particular to a liquid core optical fiber intermode interference temperature sensor. Background technique [0002] Compared with traditional sensors, fiber optic sensors have the characteristics of anti-electromagnetic interference, high sensitivity, wide range of measurement objects, compatibility, easy networking, small size and light weight, and can be used in high voltage, high noise, high temperature and strong corrosion. It works normally in many special environments and is widely used in various fields of national economy and national defense and military fields. In recent years, in order to further improve the temperature sensitivity of fiber optic sensors, people have proposed a scheme of injecting liquid into hollow fiber or photonic crystal fiber to make a highly sensitive temperature sensor by taking advantage of the large thermo-optic coefficient of li...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing scheme of injecting liquid into hollow fiber or photo

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