Optical spectroscopy has a broad scientific basis in chemistry, physics, and material science,
with diverse applications in medicine, pharmaceuticals, agriculture, and environmental …

The vast majority of gaseous chemical substances exhibit fundamental rovibrational
absorption bands in the mid-infrared spectral region (2.5–25 μm), and the absorption of light …

Several gas molecules of environmental and domestic significance exhibit a strong deep-UV
absorption. Therefore, a sensitive and a selective gas detector based on this unique …

Fiber gas sensing techniques have been applied for a wide range of industrial applications.
In this paper, the basic fiber gas sensing principles and the development of different fibers …

We demonstrated a mid-infrared (mid-IR) gas sensor based on a hollow waveguide (HWG)
cell, which was fabricated with a flexible polycarbonate (PC) base tube. The HWG inner …

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 …

Here we designed, optimized, and proposed a flexible low frequency resonant
photoacoustic (PA) gas sensor by using a large core leaky hollow core fiber (L-HCF). The …

Mid-infrared absorption spectroscopy is a powerful tool to measure and analyze
composition, concentration and structure of substance molecules. Due to the advantages of …

Sensors that measure dissolved gases directly are needed for environmental, industrial, and
biomedical applications. Here we present a hollow core fiber optic sensor capable of …

The development of compact fiber-based light sources emitting over a wide wavelength
range in the mid-infrared and their application to the detection of greenhouse gases and …