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Chip-scale broadband spectroscopic chemical sensing using an integrated supercontinuum source in a chalcogenide glass waveguide

查看全文 作　　者：QINGYANG [1]DU;ZHENGQIAN [2]LUO;HUIKAI [1,3]ZHONG;YIFEI [1]ZHANG;YIZHONG [2]HUANG;TUANJIE [2]DU;WEI [4]ZHANG;TIAN [1]GU;JUEJUN [1]HU 高影响力作者 机构地区：[1]Department of Materials Science and Engineering,Massachusetts Institute of Technology;[2]Department of Electronic Engineering,Xiamen University;[3]College of Information Science and Electronic Engineering,Zhejiang University;[4]Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province,Ningbo University高影响力机构 出　　处：《Photonics Research》索引2018年第6卷第6期,共5页高影响力期刊 基　　金：National Science Foundation(NSF)(6937070);Defense Threat Reduction Agency(DTRA)(HDTRA1-13-1-0001);National Natural Science Foundation of China(NSFC)(61475129);Natural Science Foundation of Fujian Province,China(2017J06016) 摘　　要：On-chip spectroscopic sensors have attracted increasing attention for portable and field-deployable chemical detection applications. So far, these sensors largely rely on benchtop tunable lasers for spectroscopic interrogation. Large footprint and mechanical fragility of the sources, however, preclude compact sensing system integration. In this paper, we address the challenge through demonstrating, for the first time to our knowledge, a supercontinuum source integrated on-chip spectroscopic sensor, where we leverage nonlinear Ge_(22)Sb_(18)Se_(60) chalcogenide glass waveguides as a unified platform for both broadband supercontinuum generation and chemical detection. A home-built, palm-sized femtosecond laser centering at 1560 nm wavelength was used as the pumping source. Sensing capability of the system was validated through quantifying the optical absorption of chloroform solutions at 1695 nm. This work represents an important step towards realizing a miniaturized spectroscopic sensing system based on photonic chips. 关 键 词：Chip-scale broadband spectroscopic chemical sensing using an integrated supercontinuum source in a chalcogenide glass waveguide length SC
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