Thanks to the guidance of an optical wave in air, hollow-core fibers may serve as sampling
cells in an optical spectroscopic system. This paper reviews applications of hollow-core …

In this paper we report a mid-infrared sensor based on an anti-resonant hollow core fiber. A
quantum cascade laser operating around 4.53 µm is used to target one of the strongest …

A laser-based spectrometer exploiting a novel Kagome-type hollow core photonic crystal
fiber, which serves as a gas cell is demonstrated. Low attenuation of this silica-based fiber in …

A novel and compact interferometric refractive index (RI) point sensor is developed using
hollow-core photonic crystal fiber (HC-PCF) and experimentally demonstrated for high …

In this paper, we demonstrate the laser-based gas sensing of methane near 3.3 µm inside
hollow-core photonic crystal fibers. We exploit a novel anti-resonant Kagome-type hollow …

In this paper, we present a laser-based sensing inside anti-resonant hollow core fiber. A
distributed feedback laser diode operating near 2004 nm and a 1.35-m-long silica-based …

This work demonstrates the potential application of anti-resonant hollow-core fibers (AR-
HCFs) as efficient sensors to simultaneously monitor three gases: methane, carbon …

Taking advantage of the near-infrared (IR) absorption characteristics of gases, a sensor with
an ultrasmall sample volume composed of a sealed slot waveguide and based on …

Anti-resonant hollow-core silica fiber is used to demonstrate near-and mid-infrared laser
absorption spectroscopy of methane. Molecular transitions near 6057 cm-1 (~ 1651 nm) and …

We present laser-based spectroscopy in the mid-infrared spectral region inside novel anti-
resonant (AR) hollow core fiber (HCF). AR-HCF used in this work has small (few dB/m) …