Here, we focus on the review of HC-PCF gas sensing, including the light-guiding mechanisms of HC-PCFs, various sensing configurations, microfabrication approaches, and recent research advances including the mid-infrared gas sensors via hollow core anti-resonant fibers. In various specialty fibers, hollow-core photonic crystal fibers (HC-PCFs) can overcome the fundamental limits of solid fibers and have attracted intense interest recently. Many scientists have already reporte the use of PCFs as a gas sensor. In this review article, the work done by other scientists using. applied for a wide range of industrial applications. The capacity of the multichannel sensing network is expanded by time division multiplexing and wavelength division multiplexing technology.
[PDF Version]