Spectral measurement method and device based on optical switch array
An optical switch array and spectral measurement technology, applied in the field of spectral measurement, can solve problems such as reducing the cost of spectral measurement, and achieve the effects of improving the dynamic range of measurement, space resource occupation, cost reduction, and reduction in the number of photodetectors
Active Publication Date: 2022-07-01
徐州光引科技发展有限公司
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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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[0029] In order to avoid ambiguity, some technical terms used in the present invention are defined as follows: "multi" in "multiple" and "multilevel" used in the present invention means that the number is three or more, and the "plurality" used in the present invention "Number" means that the number is two or more.
[0030] like figure 1 As shown, the existing computational spectrometer includes a branching unit, M broadband shaping devices, M photodetectors, and a signal processing unit; The signals are respectively processed by M broadband shaping devices with different transfer functions, and then converted into electrical signals by M photodetectors. The signal processing unit processes the M electrical signals to obtain spectral information of the optical signal to be measured. The optical signal to be measured is divided into M channels and then passes through M broadband shaping devices with different transfer functions one by one, where M is a positive integer and is ...
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The invention discloses a spectrum measurement method based on an optical switch array, wherein a group of wide-spectrum shaping units with different shaping parameters are set into a multi-level structure, and each level of the multi-level structure includes a plurality of wide-spectrum shaping units; A wide-spectrum shaping unit is simultaneously selected from each stage of the multi-level structure by using a multi-level optical switching array, so that multiple selected 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 the gating method of the step-light switching array, and the light-to-be-measured signal is globally sampled by this series of wide-spectrum shaping devices; reconstruction is based on the obtained series of global sampling results. out the spectrum to be measured. The invention also discloses a spectrum measurement device based on the optical switch array. Compared with the prior art, the present invention does not require light splitting, does not introduce additional light splitting loss, and can greatly improve the system signal-to-noise ratio and the measurement dynamic range.
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...
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IPC IPC(8): G01J3/28G01J3/12
CPCG01J3/28G01J3/12
Inventor 李昂蔡宇翔倪博洋
Owner 徐州光引科技发展有限公司