An Interferometer Based on Microfiber Cone and Spherical Reflection

Abstract

The invention discloses an interferometer based on a microfiber cone spherical reflection type. The technical solution adopted is as follows: a sealant is used to fix the microfiber cone at the axial center of the capillary tube. In order to avoid the vibration of the microfiber cone from affecting the stability of the structure properties, use fixed brackets to support and fix it. In order to construct the F‑P cavity, high-temperature fusion technology is used to taper the single-mode optical fiber and fuse its taper tip to obtain microspheres. The other end of the single-mode optical fiber is fixed at the axis of the capillary with sealant. In order to avoid structural jitter, it Effect of perfusing the capillary with buffer on sensing performance. This structure builds an F-P interference cavity based on the optical evanescent field and the microsphere spherical surface, which can effectively improve the response speed of the F-P structure and is suitable for real-time monitoring of dynamic parameters such as acceleration.

Description

technical field [0001] The invention relates to a spherical reflective interferometer structure based on micro-fiber cones, and relates to an F-P interferometer in which an interference cavity is constructed by micro-fiber cones and microspheres. Background technique [0002] Optical fiber sensors have the advantages of high resolution, high temperature resistance, corrosion resistance, and electromagnetic interference resistance. Therefore, the application of optical fiber strain sensors to engineering structure monitoring has become a research hotspot for scholars from various countries in recent decades. Many different types of optical fibers have been designed during this period. sensor. The fiber optic F-P interferometer was invented as early as the 1980s. Its working mechanism is based on the interference phenomenon of light waves. The signal light after a certain length of F-P cavity will interfere with the original reference light. Through the spectral demodulation o...

AI Technical Summary

Problems solved by technology

For example, in the measurement of acceleration, the traditional F-P acceleration sensor changes the length of the F-P cavity through the movement of the inertial mass, and its response speed and accuracy are difficult to meet the needs of precise measurement.

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