Optical Fiber Temperature Sensing System Based on Silicon-based g‑t Cavity
An optical fiber temperature and silicon-based technology, applied in the field of optical fiber sensing, can solve the problems of difficulty in ensuring measurement accuracy and long-term reliability, easy changes in the connection between the sensitizing material and the optical fiber, and easy interference by external pressure. It achieves simple structure, The effect of low cost and little external pressure interference
Active Publication Date: 2017-08-25
SHENZHEN INST OF ADVANCED TECH
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Problems solved by technology
In the above structure, the F-P cavity is in an unfilled state, the connection between the sensitizing material and the optical fiber is easy to change, and it is difficult to control. It is difficult to guarantee the measurement accuracy and long-term reliability, and it is easily disturbed by external pressure during use.
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[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0022] Introduction of G-T cavity: G-T cavity is a kind of F-P cavity. The difference between it and the general F-P cavity is that one reflective surface of its cavity is close to complete reflection, and the reflectivity is close to 1. The other reflective surface is partial reflection, and the reflectivity is close to 1. less than 1. The light enters the cavity from the partially reflective surface, and after multiple reflections and oscillations in the cavity, it is emitted from the same side, and the insertion loss is small. In the application of the sensor, ...
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Abstract
A kind of optical fiber temperature sensing system based on silicon-based G-T cavity, comprising sequentially connected light source, silicon-based G-T cavity optical fiber temperature sensor and spectral analysis unit, said silicon-based G-T cavity optical fiber temperature sensor includes The fixed sleeve of the cavity, the double optical fiber head, the silicon sensing chip and the filler, the silicon sensing chip is bonded between the inner walls of the cavity, and the double optical fiber head is bonded between one end of the cavity and the filler. One side of the silicon sensor chip is opposite, and the cavity opposite to the other side of the silicon sensor chip is filled with the filler. The system uses a silicon sensor chip, and the parts of the sensor are bonded with glue. The inside of the sensor is in a solid filling state. While maintaining the advantages of simple structure, low cost, and anti-electromagnetic interference, it has small interference from external pressure and high measurement accuracy. High, high long-term reliability.
Description
technical field [0001] The invention belongs to optical fiber sensing technology, in particular to an optical fiber temperature sensing system based on a silicon-based G-T (Gires-Tournois) cavity. Background technique [0002] At present, temperature as an important physical parameter occupies a very important position in engineering applications and scientific research. Traditional temperature sensors represented by thermocouples, platinum alloys and semiconductors have simple principles, high measurement accuracy, and low cost. advantages and are widely used in various fields such as national economy and national defense construction. However, in the case of strong electromagnetic interference or inflammable and explosive occasions, traditional temperature sensors based on electrical signal measurement are helpless, and optical fiber temperature measurement technology itself has no charge, Small size, light weight, easy to bend, anti-electromagnetic interference, anti-radi...
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IPC IPC(8): G01K11/32
Inventor 董玉明焦国华鲁远甫吕建成罗阿郁
Owner SHENZHEN INST OF ADVANCED TECH