An inversely designed integrated spectrometer with reconfigurable performance and ultra-low power consumption  

作　　者：Ang Li Yifan Wu Chang Wang Feixia Bao Zongyin Yang Shilong Pan 

机构地区：[1]National Key Laboratory of Microwave Photonics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [2]Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University,Suzhou 215006,China [3]College of Information Science and Electronic Engineering,Zhejiang University,Hangzhou 310058,China

出　　处：《Opto-Electronic Advances》2024年第8期43-54,共12页光电进展（英文）

基　　金：supports from following sources:National Key R&D Program of China(grant No.2021YFB2801500);National Natural Science Foundation of China(grant No.62375126,No.62105149 and No.62334001);Natural Science Foundation of Jiangsu Province(grant No.BK20210288);Opening Foundation of Key Laboratory of Laser&Infrared System(Shandong University),Minister of Education Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University State Key Laboratory of Advanced Optical Communication Systems and Networks,China Specially-appointed Professor Fund of Jiangsu.

摘　　要：Despite the pressing demand for integrated spectrometers,a solution that deliver high-performance while being practically operated is still missing.Furthermore,current integrated spectrometers lack reconfigurability in their performance,which is highly desirable for dynamic working scenarios.This study presents a viable solution by demonstrating a userfriendly,reconfigurable spectrometer on silicon.At the core of this innovative spectrometer is a programmable photonic circuit capable of exhibiting diverse spectral responses,which can be significantly adjusted using on-chip phase shifters.The distinguishing feature of our spectrometer lies in its inverse design approach,facilitating effortless control and efficient manipulation of the programmable circuit.By eliminating the need for intricate configuration,our design reduces power consumption and mitigates control complexity.Additionally,our reconfigurable spectrometer offers two distinct operating conditions.In the Ultra-High-Performance mode,it is activated by multiple phase-shifters and achieves exceptional spectral resolution in the picometer scale while maintaining broad bandwidth.On the other hand,the Ease-of-Use mode further simplifies the control logic and reduces power consumption by actuating a single-phase shifter.Although this mode provides a slightly degraded spectral resolution of approximately 0.3 nm,it prioritizes ease of use and is wellsuited for applications where ultra-fine spectral reconstruction is not a primary requirement.

关 键 词：silicon photonics integrated spectrometers computational spectrometers 

分 类 号：TH744.1[机械工程—光学工程]