Low-cost biochemical sensor based on narrow-linewidth microcavity and broadband light source

Abstract

The invention provides a low-cost biochemical sensor based on a narrow-linewidth microcavity and a broadband light source. The low-cost biochemical sensor based on the narrow-linewidth microcavity and the broadband light source comprises the broadband light source and a double straight waveguide coupled micro-ring cavity, wherein the double straight waveguide coupled micro-ring cavity comprises a first straight waveguide, a second straight waveguide and a micro-ring resonant cavity; the micro-ring resonant cavity and the waveguides are prepared on SOI sequentially via exposure and etching; the micro-ring resonant cavity is in coupling connection with the first straight waveguide and the second straight waveguide separately; the broadband light source is input into the double straight waveguide coupled micro-ring cavity; sensing can be realized by monitoring the intensity change of an output signal of the double straight waveguide coupled micro-ring cavity. The low-cost biochemical sensor based on the narrow-linewidth microcavity and the broadband light source can effectively increase the measuring flux, greatly reduces the manufacturing cost and meet the portable requirement; the output light power is directly detected by using the broadband light source, so the sensitivity of the sensor is effectively improved.

Description

Technical field [0001] The invention belongs to the technical field of optical sensors, and specifically relates to a biochemical sensor based on a narrow linewidth microcavity and a broadband light source. Background technique [0002] Taking into account the progress of micro-nano preparation technology and clinical actual needs, higher requirements will be put forward for the integration and cost control of sensors in the future. At this stage, high-precision detection technology largely relies on large-scale equipment and cutting-edge scientific research equipment, such as scientific-grade spectrometers and narrow-linewidth tunable lasers used in optical sensing, and large-scale equipment for sample pretreatment. These devices are bulky, difficult to operate, and expensive, which limits the commercialization of high-precision sensors. These restrictions make it impossible for such sophisticated equipment to be used in remote and rural areas where it is really needed. At the ...

AI Technical Summary

Problems solved by technology

However, currently such sensors mostly use ultra-narrow linewidth tunable lasers, which are expensive to manufacture and require a large number of scientific research equipment and professional operators to realize, which is not suitable for real commercial promotion value.

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