Spectral sampling element and computational spectral measurement device

Through the combination of auto-coupled optical waveguide and ring optical waveguide, the transmission function of the spectral sampling element is optimized, which solves the problems of high difficulty and cost of spectrometer processing in the prior art, and achieves high-precision and low-cost spectral reconstruction.

CN114812810BActive Publication Date: 2025-08-29NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Application Number
CN202210546731.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-05-18
Publication Date
2025-08-29
Estimated Expiration
2042-05-18

AI Technical Summary

Technical Problem

The spectral sampling components of existing computing spectrometers are difficult to process, costly and have scattering losses, making it difficult to take into account large bandwidth, high precision and high signal-to-noise ratio.

Method used

The spectral sampling element consisting of a self-coupled optical waveguide and annular optical waveguide of multiple self-coupled regions is optimized through a multi-objective optimization method to improve randomness and reduce correlation and reduce the number of spectral sampling elements.

Benefits of technology

It reduces the processing difficulty and cost of spectral sampling components, while improving the accuracy and signal-to-noise ratio of spectral measurement, and realizes large bandwidth and high-precision spectral reconstruction.

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Abstract

The present invention discloses a spectral sampling element for global spectral sampling in computational spectral measurement, wherein the spectral sampling element is a self-coupling optical waveguide having multiple self-coupling regions, wherein the self-coupling regions are formed by bending and folding the self-coupling optical waveguide itself. The present invention also discloses a computational spectral measurement device. Compared with the prior art, the spectral sampling element proposed in the present invention is based on an ordinary waveguide structure, does not require high process precision like gratings or photonic crystal devices, and does not introduce additional scattering losses. It is easy to design, does not require high processing precision, and has a larger working bandwidth and higher precision. The computational spectral measurement device proposed in the present invention can reconstruct the input spectrum with high precision through a single measurement. Due to the use of the above-mentioned spectral sampling element, the manufacturing difficulty and manufacturing cost are greatly reduced, and the measurement accuracy is effectively improved. Its practicality far exceeds that of existing computational spectrometers.
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