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

• DOI: 10.1364/prj.6.000506
• Publication Date: 2018-04-26T19:05:26Z
• Authors: Qingyang Du; Zhengqian Luo; Huikai Zhong; Yifei Zhang; Yizhong Huang; Tuanjie Du; Wei Zhang; Tian Gu; Juejun Hu
• Keywords: Supercontinuum; Chalcogenide glass

On-chip spectroscopic sensors have attracted increasing attention for portable and field-deployable chemical detection applications.So far, these largely rely on benchtop tunable lasers interrogation.Large footprint mechanical fragility of the sources, however, preclude compact sensing system integration.In this paper, we address challenge through demonstrating, first time to our knowledge, a supercontinuum source integrated on-chip sensor, where leverage nonlinear Ge 22 Sb 18 Se 60 chalcogenide glass waveguides as unified platform both broadband generation detection.A home-built, palm-sized femtosecond laser centering at 1560 nm wavelength was used pumping source.Sensing capability validated quantifying optical absorption chloroform solutions 1695 nm.This work represents an important step towards realizing miniaturized based photonic chips.