Digital Integrated Optical Waveguide Sensor Based on Cascaded Microcavities

Abstract

The digital integrated optical waveguide sensor based on the cascaded microcavity of the present invention comprises a constant microcavity, an input waveguide, n sensing microcavities, n connection waveguides, n output waveguides and n sample slots, n≥ 1; each sensing microcavity is placed in the sample groove, the input waveguide is located on one side of the constant microcavity, one end of the input waveguide is coupled with the constant microcavity, and the other end is the light source access end of the entire optical waveguide sensor; n One end of each connecting waveguide is coupled with a constant microcavity, the other end of n connecting waveguides is respectively coupled with n sensing microcavities, one end of n output waveguides is respectively coupled with n sensing microcavities, n The other end of the output waveguide is the sensing signal output end. The optical waveguide sensor has a digital working mode, high sensitivity, good anti-noise performance, high reliability, and is easy to expand to realize array formation, and is convenient for single-chip integration with integrated spectrometers, which is conducive to the realization of integration, miniaturization, portability, and low cost. sensor system.

Description

technical field [0001] The invention relates to a digital integrated optical waveguide sensor based on cascaded microcavities, belonging to the field of optical sensing. Background technique [0002] In the fields of drug development, environmental monitoring, and food safety testing, reliable testing methods are indispensable, and sensing technology is its core technology. Using advanced sensing technology, qualitative or quantitative analysis can be performed on the composition / concentration of substances. Optical sensing is an important branch of sensing technology. Its basic principle is: when the measured substance interacts with the light field, it will cause changes in some parameters of the optical signal (such as intensity, wavelength, phase, polarization state, mode distribution, etc.). [0003] Among the many different forms of optical sensors, the integrated optical waveguide sensor is currently the most concerned type. Integrated optical waveguide sensors usua...

AI Technical Summary

Problems solved by technology

At this time, for high-sensitivity sensing applications, expensive high-resolution (such as 0.01nm) spectrometers often become indispensable and important detection instruments, which hinders the miniaturization, portability and cost reduction of optical sensing systems

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