Patent · US Active

Silicon fourier transform spectrometer and optical spectrum reconstruction method

US11733098B2 · kind B2 · utility

0Cited by

4References

8Claims

0Family size

Assignee

Shanghai Jiao Tong University · CN

Inventors

Liangjun LU · Shanghai, CN
Junjie Du · Sudbury, US
Linjie Zhou · Shanghai, CN
Jianping Chen · Shanghai, CN
Jiao Liu · Shanghai, CN

Key dates

Filing date	Dec 23, 2021
Grant date	Aug 22, 2023
Priority date	—
Expiry date	Feb 9, 2042

Classification

Technology area (CPC G)Physics
CPC primaryG01J3/4531
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A silicon Fourier transform spectrometer and an optical spectrum reconstruction method are disclosed. The spectrometer includes a waveguide input coupler, cascaded optical switches, unbalanced subwavelength grating (SWG) waveguide pairs, and a germanium silicon detector, where the cascaded optical switches are connected through unbalanced SWG waveguide pairs. The state of the optical switches are adjusted to digitally configure the optical path, so as to constitute a series of unbalanced Mach-Zehnder interferometer (MZI) arrays with different optical path differences, to realize a Fourier transform spectrometer based on spatial heterodyne. The optical spectrum is reconstructed by using a compressed sensing algorithm.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.