scholarly journals Characterization of Gas Absorption Modules Based on Flexible Mid-Infrared Hollow Waveguides

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1698
Author(s):  
Kewang Chen ◽  
Zeqiao Zhao ◽  
Xuewen Zhang ◽  
Xian Zhang ◽  
Xiaosong Zhu ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Coupling Efficiency ◽  
Gas Absorption ◽  
Infrared Light ◽  
Experimental Investigations ◽  
Hollow Waveguide ◽  
Low Loss ◽  
Mid Infrared ◽  
Hollow Waveguides ◽  
Sensing System

A new gas absorption module, the substrate-embedded hollow waveguide (eHWG) model, is proposed. It consists of a substrate with a curved channel and a hollow waveguide. The hollow waveguide is curved into the channel and works as a gas absorption cell as well as a transmission medium for mid-infrared light. Owing to the low loss property of the hollow waveguide, the signal-to-noise ratio (SNR) was improved for the sensing system. A polycarbonate (PC) base tube was used to obtain flexibility in the fabrication of the hollow waveguide. A silver (Ag) layer and a silver iodide (AgI) layer were inner-coated to ensure a low loss property at the fingerprint wavelength of methane gas. A sensing system was established using a Fourier transform infrared spectrometer (FTIR), an external detector, and an eHWG. Experimental investigations were carried on the sensing performance of eHWGs with various channel shapes. Comparison studies were made on eHWGs embedded with Ag-coated or Ag- and AgI-coated hollow waveguides. The Ag- and AgI-coated hollow waveguides with inner diameters of 0.7, 1.4, and 2.0 mm were used in the eHWGs. The large bore waveguide had low loss but high bending additional loss. The large bore waveguide had a low detection limit due to high coupling efficiency with the light source. A limit of detection (LOD) as low as 2.7 ppm was attained for the system using the eHWG with the long and large bore waveguide.

Development and Optimization of a Mid-Infrared Hollow Waveguide Gas Sensor Combined with a Supported Capillary Membrane Sampler

2003 ◽  
Vol 57 (6) ◽  
pp. 600-606 ◽  
Author(s):  
Fabiano De Melas ◽  
Viktor V. Pustogov ◽  
Nathan Croitoru ◽  
Boris Mizaikoff
Keyword(s):  
Gas Sensor ◽  
Industrial Applications ◽  
Hollow Waveguide ◽  
Mid Infrared ◽  
Hollow Waveguides ◽  
Sensing System ◽  
Capillary Membrane ◽  
Sensor Module ◽  
Optical Configuration ◽  
Ft Ir

A gas sensor for application in water analysis was developed by combination of a mid-infrared (MIR) hollow waveguide with a Fourier transform infrared (FT-IR) spectrometer and coupling of the hollow waveguide gas sensor module to a supported capillary membrane sampler (SCMS) for continuous liquid-gas extraction. Different hollow waveguides have been characterized in this study for developing an optimized optical configuration. Analysis of industrially relevant compounds has been performed, investigating chlorinated hydrocarbons (CHCs), such as dichloromethane and chloroform, representing highly volatile analytes, and 1,4-dioxane as an example of target compounds with low volatility. The suitability of this spectroscopic IR sensing system for industrial applications is demonstrated under simulated real-world conditions with limits of detection in the ppb (v/v) and ppm (v/v) concentration range for CHCs and 1,4-dioxane, respectively.

scholarly journals iHEART: a miniaturized near-infrared in-line gas sensor using heart-shaped substrate-integrated hollow waveguides

The Analyst ◽  
2016 ◽  
Vol 141 (18) ◽  
pp. 5298-5303 ◽  
Author(s):  
Rafael L. Ribessi ◽  
Thiago de A. Neves ◽  
Jarbas J. R. Rohwedder ◽  
Celio Pasquini ◽  
Ivo M. Raimundo ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Near Infrared ◽  
Gas Sensing ◽  
Hollow Waveguide ◽  
Hollow Waveguides ◽  
Sensing System

Integration of a heart-shaped substrate-integrated hollow waveguide with a micro-spectrometer results in an ultra-compact gas sensing system: iHEART.

Big bore and extremely flexible mid-infrared hollow waveguide for gas absorption module

2019 ◽  
Vol 285 ◽  
pp. 45-49 ◽  
Author(s):  
Kewang Chen ◽  
Xuewen Zhang ◽  
Zeqiao Zhao ◽  
Jingyi Wei ◽  
Xiaosong Zhu ◽  
...  
Keyword(s):  
Gas Absorption ◽  
Hollow Waveguide ◽  
Mid Infrared

Construction of a dual-core hollow waveguide for visible and mid-infrared light transmission based on PTFE tubing and UV gel

2021 ◽  
Vol 53 (5) ◽  
Author(s):  
Shuoying Yu ◽  
Zihan Sun ◽  
Guishun Li ◽  
Guoxing Xie ◽  
Yang Shen ◽  
...  
Keyword(s):  
Light Transmission ◽  
Infrared Light ◽  
Hollow Waveguide ◽  
Mid Infrared ◽  
Dual Core

scholarly journals Low-Loss Hollow Waveguide Fibers for Mid-Infrared Quantum Cascade Laser Sensing Applications

Sensors ◽  
2013 ◽  
Vol 13 (1) ◽  
pp. 1329-1340 ◽  
Author(s):  
Pietro Patimisco ◽  
Vincenzo Spagnolo ◽  
Miriam Vitiello ◽  
Gaetano Scamarcio ◽  
Carlos Bledt ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Hollow Waveguide ◽  
Low Loss ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Sensing Applications ◽  
Laser Sensing

scholarly journals Low-loss silicon core fibre platform for mid-infrared nonlinear photonics

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Haonan Ren ◽  
Li Shen ◽  
Antoine F. J. Runge ◽  
Thomas W. Hawkins ◽  
John Ballato ◽  
...  
Keyword(s):  
Wavelength Conversion ◽  
Coupling Efficiency ◽  
Silicon On Insulator ◽  
Nonlinear Propagation ◽  
Infrared Light ◽  
Light Sources ◽  
Space Communications ◽  
Mid Infrared ◽  
Core Fibre ◽  
Power Handling Capability

AbstractBroadband mid-infrared light sources are highly desired for wide-ranging applications that span free-space communications to spectroscopy. In recent years, silicon has attracted great interest as a platform for nonlinear optical wavelength conversion in this region, owing to its low losses (linear and nonlinear) and high stability. However, most research in this area has made use of small core waveguides fabricated from silicon-on-insulator platforms, which suffer from high absorption losses of the use of silica cladding, limiting their ability to generate light beyond 3 µm. Here, we design and demonstrate a compact silicon core, silica-clad waveguide platform that has low losses across the entire silicon transparency window. The waveguides are fabricated from a silicon core fibre that is tapered to engineer mode properties to ensure efficient nonlinear propagation in the core with minimal interaction of the mid-infrared light with the cladding. These waveguides exhibit many of the benefits of fibre platforms, such as a high coupling efficiency and power handling capability, allowing for the generation of mid-infrared supercontinuum spectra with high brightness and coherence spanning almost two octaves (1.6–5.3 µm).

New Mid-Infrared Light Sources

2012 ◽  
Vol 18 (1) ◽  
pp. 531-540 ◽  
Author(s):  
Jens Biegert ◽  
Philip K. Bates ◽  
Olivier Chalus
Keyword(s):  
Infrared Light ◽  
Light Sources ◽  
Mid Infrared

scholarly journals Nonlinear optical response of low loss silicon germanium waveguides in the mid-infrared

2015 ◽  
Vol 23 (7) ◽  
pp. 8261 ◽  
Author(s):  
L. Carletti ◽  
P. Ma ◽  
Y. Yu ◽  
B. Luther-Davies ◽  
D. Hudson ◽  
...  
Keyword(s):  
Silicon Germanium ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Low Loss ◽  
Mid Infrared
Sign in / Sign up

Export Citation Format

Share Document