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Oscilloscope detection temperature sensor based on serial connection of Sagnac loop and FP cavity

A technology for detecting temperature and sensor, applied in the field of oscilloscope detecting temperature sensor, can solve the problem of low sensitivity of optical fiber sensor, and achieve the effect of improving sensitivity

Active Publication Date: 2018-03-20
HEILONGJIANG INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the sensitivity of the current optical fiber sensor is not high, and develops an oscilloscope detection temperature sensor based on the Sagnac ring and the FP cavity connected in series

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  • Oscilloscope detection temperature sensor based on serial connection of Sagnac loop and FP cavity

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[0038] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0039] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Such as figure 1 As shown, the present invention relates to an oscilloscope detecting temperature sensor based on a Sagnac ring in series with an FP cavity, including:

[0041] First coupler, isolator, second coupler, Sagnac ring, circulator, FP cavity, third coupler, flat-top grating, attenuator; th...

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Abstract

The present invention relates to an oscilloscope detection temperature sensor based on serial connection of a Sagnac loop and an FP cavity. The sensor comprises a first coupler, an isolator, a secondcoupler, a Sagnac loop, a circulator, a FP cavity, a third coupler, a flat grating and an attenuator. The first coupler is connected with the isolator, the second coupler and an inlet of the Sagnac loop, an outlet of the Sagnac loop is connected with a second inlet of the second coupler, a second outlet of the second coupler is connected with a first inlet of the circulator and the inlet of the FPcavity, the outlet of the FP cavity is connected with a second inlet of the circulator, a second outlet of the circulator is connected with the third coupler, the flat grating and the attenuator, andthe attenuator is connected with a photoelectric detector and the attenuator. The oscilloscope detection temperature sensor based on the serial connection of the Sagnac loop and the FP cavity employsa vernier effect is several-dozen times higher in sensitivity than a temperature sensor based on a single Sagnac loop structure.

Description

Technical field [0001] The invention relates to an oscilloscope detection temperature sensor, in particular to an oscilloscope detection temperature sensor based on a Sagnac ring and an FP cavity in series. Background technique [0002] Current temperature sensors based on fiber gratings are too low, only about 10pm / ℃. Temperature sensors based on long-period gratings have relatively high sensitivity, but they are sensitive to bending and external materials. Based on fiber Mach-Zehnder interferometers Or the temperature sensor of the fiber-optic Michelson interferometer is cross-sensitive to external vibration. Although the temperature sensor based on a single Sagnac ring interference has a stronger ability to resist external interference than the above temperature sensor, its sensitivity is usually only about 1nm / °C. Therefore, the development of an optical fiber sensor with higher sensitivity has become an urgent technical problem in this field. Summary of the invention [000...

Claims

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Application Information

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IPC IPC(8): G01K11/32G01K11/3206
CPCG01K11/32
Inventor 李林军杨玉强杨曦凝白云峰谢文强周龙
Owner HEILONGJIANG INST OF TECH
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