Programmable wide-spectrum shaping device and spectral measurement method and device

Abstract

The invention discloses a programmable wide-spectrum shaping device. The programmable wide-spectrum shaping device is of a multi-stage structure composed of a set of asymmetric Mach-Zehnder interferometers with different shaping parameters and a 4 * 1 beam combiner. One interference arm of the asymmetric Mach-Zehnder interferometer is connected in series with an optical phase shifter; each stage is composed of two asymmetric Mach-Zehnder interferometers except the head stage and the tail stage, the first stage is an asymmetric Mach-Zehnder interferometer, and the two asymmetric Mach-Zehnder interferometers starting from the second stage are in cross connection with the two asymmetric Mach-Zehnder interferometers of the next stage. The invention also discloses a spectral measurement method and a spectral measurement device. Compared with the prior art, spectral measurement without light splitting can be realized, the signal-to-noise ratio and the measurement dynamic interval of the system are greatly improved, and the implementation cost of spectral measurement is reduced.

Description

technical field [0001] The invention belongs to the technical field of spectrum measurement, and in particular relates to a programmable wide-spectrum shaping device for spectrum measurement. 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 into di...

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Problems solved by technology

[0004] However, the existing disclosed solutions still need to split the optical signal to be measured evenly into multiple broadband shaping devices, which is equivalent to introducing additional splitting loss. In order to pursue higher bandwidth and precision, it is necessary to increase the number of filters, which further leads to The splitting loss increases, and the system signal-to-noise ratio decreases

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