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

作　　者：QINGYANG DU ZHENGQIAN LUO HUIKAI ZHONG YIFEI ZHANG YIZHONG HUANG TUANJIE DU WEI ZHANG TIAN GU JUEJUN HU 

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

出　　处：《Photonics Research》2018年第6期506-510,共5页光子学研究（英文版）

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.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 interrog- ation. Large footprint and mechanical fragility of the sources, however, preclude compact sensing system inte- gration. 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 Ge22Sb18Se60 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：Sensors Supercontinuum generation. 

分 类 号：TN1[电子电信—物理电子学]