Spectral measurement method and device based on optical switch array

Abstract

The invention discloses a spectral measurement method based on an optical switch array, and the method comprises the steps: setting a group of wide-spectrum shaping units with different shaping parameters into a multi-stage structure, and enabling each stage of the multi-stage structure to comprise a plurality of wide-spectrum shaping units; simultaneously gating a wide-spectrum shaping unit from each stage of the multi-stage structure by using a multi-stage optical switch array, so that the plurality of gated wide-spectrum shaping units are cascaded and combined into a wide-spectrum shaping device; a series of wide-spectrum shaping devices with different output functions are obtained by adjusting the gating mode of the multi-stage optical switch array, and the wide-spectrum shaping devices are used for carrying out global sampling on optical signals to be measured; and reconstructing a spectrum to be measured according to a series of obtained global sampling results. The invention further discloses a spectral measurement device based on the optical switch array. Compared with the prior art, the method does not need light splitting, does not introduce additional light splitting loss, and can greatly improve the signal-to-noise ratio and measurement dynamic interval of the system.

Description

technical field [0001] The invention belongs to the technical field of spectrum measurement, and in particular relates to a spectrum measurement method and device based on an optical switch array. Background technique [0002] In order to detect the information of the target spectrum, the spectrometer emerges as the times require, which can recover any unknown input spectrum. Spectrometers are widely used in communications, materials science, astronomy, geographic science, remote sensing and other fields. With the development of the Internet of Things and smart devices, there is an urgent need for integrated spectrometers that can reconstruct spectra with a single measurement, such as smart wearable devices, portable medical devices, UAV remote sensing, and more. Most of the existing integrated spectrometers use a narrow-band spectrometer, that is, a narrow-band filter or a spectral grating is used to extract different wavelength components of the spectrum to be measured in...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing computational spectrum measurement technology, and provide a spectrum measurement method based on an optical switch array, which does not require light splitting, does not introduce additional light splitting loss to the signal to be measured, and can greatly improve the system. Signal-to-noise ratio and measurement dynamic range, and reduce the implementation cost of spectral measurements

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