High-precision temperature probe on basis of cavity filled micro-structure optical fiber interferometers

Abstract

The invention discloses a high-precision temperature probe on the basis of cavity filled micro-structure optical fiber interferometers. The high-precision temperature probe mainly comprises a light source, an object lens, a semi-transparent and semi-reflective mirror, an optical fiber structure and a detector. The optical fiber structure comprises an optical fiber core, optical fiber cladding, a temperature-sensitive chamber, a first reflective coating and a second reflective coating; emergent light emitted by the light source can be transmitted through the object lens into the optical fiber core via the semi-transparent and semi-reflective mirror, and one part of the light is reflected to the first reflective coating when the light source reaches the surfaces of the temperature-sensitivechamber, and then returns on an original path to be transmitted into the optical fiber core; the other part of the light is directly transmitted into the temperature-sensitive chamber, and then returns on an original path to be transmitted into the optical fiber core after the other part of the light reaches the second reflective coating, and two channels of returned light signals can be reflectedto the detector via the semi-transparent and semi-reflective mirror. The high-precision temperature probe has the advantages that the high-precision temperature probe can be applied to accurately monitoring the temperatures in narrow and small spaces and high-corrosion environments, and different sensitive materials can be selected according to the actual requirements, so that different parameters can be monitored in real time.

Description

technical field [0001] The invention belongs to the field of optical fiber technology, and relates to a high-precision temperature probe based on a cavity-filled microstructure optical fiber interferometer, which utilizes high thermal expansion and thermo-optic effects of temperature-sensitive materials to realize high-precision detection of ambient temperature. Background technique [0002] Optical fiber sensors are widely used in the temperature monitoring process in the fields of aerospace, materials, chemical industry, energy, metallurgy and building materials. Temperature fluctuations will directly affect the working efficiency of electronic devices, reduce the service life of materials and even cause material embrittlement; precise temperature control in chemical and biological experiments is also crucial, and will directly affect the structure and performance of synthetic substances; many industrial processes The precise control of the temperature is separated from th...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a high-precision temperature probe based on a cavity-filled microstructure optical fiber interferometer, which solves the problem of precise temperature monitoring in a narrow space and a highly corrosive environment

Images