Silicon photonic spectrometer with multiple customized wavelength bands  

作　　者：LONG ZHANG XIAOLIN YI DAJIAN LIU SHIHAN HONG GAOPENG WANG HENGZHEN CAO YAOCHENG SHI DAOXIN DAI 

机构地区：[1]State Key Laboratory for Modern Optical Instrumentation,Center for Optical&Electromagnetic Research,College of Optical Science and Engineering,International Research Center for Advanced Photonics,Zhejiang University,Zjingang Campus,Hangzhou 310058,China [2]Intelligent Optics and Photonics Research Center,Jiaxing Research Institute,Zhejiang University,Jiaxing 314000,China [3]Ningbo Research Institute,Zhejiang University,Ningbo 315100,China

出　　处：《Photonics Research》2024年第5期1016-1023,共8页光子学研究（英文版）

基　　金：National Science Fund for Distinguished Young Scholars(61725503);National Natural Science Foundation of China(6191101294,62305294,91950205);China Postdoctoral Science Foundation(2022M722724);Natural Science Foundation of Zhejiang Province(LD19F050001,LZ18F050001);Fundamental Research Funds for the Central Universities。

摘　　要：A silicon photonic spectrometer with multiple customized wavelength bands is developed by introducing multiple channels of wideband optical filters based on multimode waveguide gratings(MWGs)for pre-filtering and the corresponding thermally tunable narrowband filter for high resolution.For these multiple customized wavelength bands,the central wavelengths,bandwidths,and resolutions are designed flexibly as desired,so that the system is simplified and the footprint is minimized for several practical applications(e.g.,gas sensing).A customized silicon photonic spectrometer is designed and demonstrated experimentally with four wavelength bands centered around1310 nm,1560 nm,1570 nm,and 1930 nm,which is,to the best of our knowledge,the first on-chip spectrometer available for sensing multiple gas components like HF,CO,H_(2)S,and CO_(2).The spectral resolutions of the four wavelength bands are 0.11 nm,0.08 nm,0.08 nm,and 0.37 nm,respectively.Such a customized silicon photonic spectrometer shows great potential for various applications,including gas monitors,wearable biosensors,and portable spectral-domain optical coherence tomography.

关 键 词：WAVEGUIDE BANDS MULTIPLE 

分 类 号：TN713[电子电信—电路与系统] TH744.1[机械工程—光学工程]