Chip-scale broadband spectroscopic chemical sensing using an integrated supercontinuum source in a chalcogenide glass waveguide
- 26 April 2018
- journal article
- research article
- Published by Optica Publishing Group in Photonics Research
- Vol. 6 (6), 506-510
- https://doi.org/10.1364/prj.6.000506
Abstract
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 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.
Keywords
Funding Information
- 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)
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