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 inte...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.展开更多
Glass microchips with different structures and functions were fabricated in our laboratory.The basic characteristic of the home-made microchips was evaluated,such as the quality of the etched microchannels,reproducibi...Glass microchips with different structures and functions were fabricated in our laboratory.The basic characteristic of the home-made microchips was evaluated,such as the quality of the etched microchannels,reproducibility of electrophoretic separation,and life time etc..The migration time RSD for Rhodamine B in the same or different microchannels were 2.31% or 2.44%,respectively.The column efficiency in the same glass microchip didn′t declined obviously until 200 consecutive running.Compared to the glass microchip made by Micralyne,the similar separation results were obtained on both kinds of microchips.Since,the cost of the home-made glass microchips is much lower, our home-made glass microchips show a great advantage(over) the commercial microchips in terms of the performance to cost.展开更多
基金National Science Foundation(NSF)(6937070)Defense Threat Reduction Agency(DTRA)(HDTRA1-13-1-0001)+1 种基金National Natural Science Foundation of China(NSFC)(61475129)Natural Science Foundation of Fujian Province,China(2017J06016)
文摘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.
文摘Glass microchips with different structures and functions were fabricated in our laboratory.The basic characteristic of the home-made microchips was evaluated,such as the quality of the etched microchannels,reproducibility of electrophoretic separation,and life time etc..The migration time RSD for Rhodamine B in the same or different microchannels were 2.31% or 2.44%,respectively.The column efficiency in the same glass microchip didn′t declined obviously until 200 consecutive running.Compared to the glass microchip made by Micralyne,the similar separation results were obtained on both kinds of microchips.Since,the cost of the home-made glass microchips is much lower, our home-made glass microchips show a great advantage(over) the commercial microchips in terms of the performance to cost.
