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

Solution processable near infrared (NIR) photodetectors provide a promising alternative due
to their low cost, flexible design, adaptability to various fabrications, and large area …

A carbon monoxide (CO) sensing system based on hollow‐core antiresonant fiber (HC‐
ARF) is developed using tunable diode laser absorption spectroscopy (TDLAS) technology …

We present a fiber-optic photoacoustic (PA) sensor for remote monitoring of gas micro-
leakage. The gas sensing head is a miniature ferrule-top PA cavity with a cantilever beam …

In this work, a photoacoustic (PA) gas sensor with a micro-embedded acoustic resonator for
gas leakage detection was demonstrated. The micro-embedded acoustic resonator was …

A novel methane sensor based on neural network filter (NNF) assisted direct absorption
spectroscopy (DAS) technique was proposed and experimentally demonstrated. The …

Noise significantly limits the accuracy and stability of retrieving gas concentration with the
traditional direct absorption spectroscopy (DAS). Here, we developed an adaptively …

Compared with direct absorption spectroscopy (DAS), wavelength modulation spectroscopy
(WMS) with good ability of suppressing noise is rarely used in waveguide sensor. The …

The reported chalcogenide (ChG) waveguide sensor mainly focuses on rectangular
waveguide with a small evanescent field for light-gas interaction. In order to improve the …

A novel compact intrinsic safety full range methane (CH 4) microprobe sensor based on
spectroscopy techniques is proposed for leaking detection in explosion risk environment …