Silicon photonic on-chip trace-gas spectroscopy of methane
Eric J. Zhang, L. Tombez, et al.
CLEO 2016
Infrared tunable diode-laser absorption spectroscopy (IRTDLAS) is an enabling technology for trace-gas detection, with applications ranging from air-quality monitoring to medical diagnostics. However, such sensors typically utilize discrete optical components that pose practical cost limits for large-scale network deployments. Here, we leverage silicon photonics technology to demonstrate IR-TDLAS on an integrated CMOS-compatible platform for methane (CH4) spectroscopy. Using near-IR (1650 nm) light from a distributed-feedback laser and an uncooled InGaAs detector, the evanescent optical field of a high-index contrast nanoscale silicon waveguide is used to probe ambient CH4, yielding Gaussian-noise-limited sub-100 parts-per-million by volume detection limits. Our results demonstrate the feasibility of chip-scale photonic integration for realizing compact, cost-effective, and versatile gas sensors capable of tackling diverse energy and environmental challenges, such as natural- gas leak quantification and localization for fugitiveemissions monitoring.
Eric J. Zhang, L. Tombez, et al.
CLEO 2016
Martin Sandberg, Vivekananda P. Adiga, et al.
Applied Physics Letters
Eric J. Zhang, L. Tombez, et al.
CLEO 2016
Eric Zhang, Srikanth Srinivasan, et al.
APS March Meeting 2021