Antiresonant hollow-core fiber-assisted mid-IR hydrocarbons gas sensor

2021 ◽  
Author(s):  
Piotr Jaworski ◽  
Karol Krzempek ◽  
Paweł Kozioł ◽  
Grzegorz Dudzik ◽  
Dakun Wu ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Hollow Core ◽  
Core Fiber

scholarly journals Antiresonant Hollow-Core Fiber-Based Dual Gas Sensor for Detection of Methane and Carbon Dioxide in the Near- and Mid-Infrared Regions

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3813 ◽  
Author(s):  
Piotr Jaworski ◽  
Paweł Kozioł ◽  
Karol Krzempek ◽  
Dakun Wu ◽  
Fei Yu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Simultaneous Detection ◽  
Hollow Core ◽  
Mid Infrared ◽  
Sensing Applications ◽  
Core Fiber ◽  
Sensor Configuration ◽  
Carbon Dioxide Co2

In this work, we present for the first time a laser-based dual gas sensor utilizing a silica-based Antiresonant Hollow-Core Fiber (ARHCF) operating in the Near- and Mid-Infrared spectral region. A 1-m-long fiber with an 84-µm diameter air-core was implemented as a low-volume absorption cell in a sensor configuration utilizing the simple and well-known Wavelength Modulation Spectroscopy (WMS) method. The fiber was filled with a mixture of methane (CH4) and carbon dioxide (CO2), and a simultaneous detection of both gases was demonstrated targeting their transitions at 3.334 µm and 1.574 µm, respectively. Due to excellent guidance properties of the fiber and low background noise, the proposed sensor reached a detection limit down to 24 parts-per-billion by volume for CH4 and 144 parts-per-million by volume for CO2. The obtained results confirm the suitability of ARHCF for efficient use in gas sensing applications for over a broad spectral range. Thanks to the demonstrated low loss, such fibers with lengths of over one meter can be used for increasing the laser-gas molecules interaction path, substituting bulk optics-based multipass cells, while delivering required flexibility, compactness, reliability and enhancement in the sensor’s sensitivity.

Ultrasensitive photothermal gas sensor with a dual-mode anti-resonant hollow-core fiber

2021 ◽  
Author(s):  
Pengcheng Zhao ◽  
Yan Zhao ◽  
Haihong Bao ◽  
Hoi Lut Ho ◽  
Wei Jin ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Hollow Core ◽  
Dual Mode ◽  
Core Fiber

Hollow-core fiber Fabry–Perot photothermal gas sensor

2016 ◽  
Vol 41 (13) ◽  
pp. 3025 ◽  
Author(s):  
Fan Yang ◽  
Yanzhen Tan ◽  
Wei Jin ◽  
Yuechuan Lin ◽  
Yun Qi ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Hollow Core ◽  
Fabry Perot ◽  
Core Fiber

Highly sensitive and stable photothermal gas sensor with a hollow-core fiber Fabry-Perot cavity

2021 ◽  
Author(s):  
Haihong Bao ◽  
Yingzhen Hong ◽  
Wei Jin ◽  
Hoilut Ho ◽  
Shoufei Gao ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Hollow Core ◽  
Highly Sensitive ◽  
Fabry Perot ◽  
Core Fiber

scholarly journals Liquid level sensor based on dynamic Fabry–Perot interferometers in processed capillary fiber

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pablo Roldán-Varona ◽  
Rosa Ana Pérez-Herrera ◽  
Luis Rodríguez-Cobo ◽  
Luis Reyes-González ◽  
Manuel López-Amo ◽  
...  
Keyword(s):  
Optical Fiber Sensor ◽  
Liquid Level ◽  
Hollow Core ◽  
Immiscible Liquids ◽  
Fabry Perot ◽  
Detection Mode ◽  
Level Sensor ◽  
Core Fiber ◽  
Liquid Level Sensor ◽  
Silica Capillary

AbstractIn this work, a novel optical fiber sensor capable of measuring both the liquid level and its refractive index is designed, manufactured and demonstrated through simulations and experimentally. For this, a silica capillary hollow-core fiber is used. The fiber, with a sensing length of 1.55 mm, has been processed with a femtosecond laser, so that it incorporates four holes in its structure. In this way, the liquid enters the air core, and it is possible to perform the sensing through the Fabry–Perot cavities that the liquid generates. The detection mode is in reflection. With a resolution of 4 μm (liquid level), it is in the state of the art of this type of sensor. The system is designed so that in the future it will be capable of measuring the level of immiscible liquids, that is, liquids that form stratified layers. It can be useful to determine the presence of impurities in tanks.

scholarly journals Vacuum Ultraviolet Absorption Spectroscopy Analysis of Breath Acetone Using a Hollow Optical Fiber Gas Cell

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 478
Author(s):  
Yudai Kudo ◽  
Saiko Kino ◽  
Yuji Matsuura
Keyword(s):  
Body Fat ◽  
Vacuum Ultraviolet ◽  
Exhaled Breath ◽  
Hollow Core ◽  
Gas Cell ◽  
Human Breath ◽  
Healthy Human ◽  
Acetone Concentration ◽  
Core Fiber ◽  
Breath Acetone

Human breath is a biomarker of body fat metabolism and can be used to diagnose various diseases, such as diabetes. As such, in this paper, a vacuum ultraviolet (VUV) spectroscopy system is proposed to measure the acetone in exhaled human breath. A strong absorption acetone peak at 195 nm is detected using a simple system consisting of a deuterium lamp source, a hollow-core fiber gas cell, and a fiber-coupled compact spectrometer corresponding to the VUV region. The hollow-core fiber functions both as a long-path and an extremely small-volume gas cell; it enables us to sensitively measure the trace components of exhaled breath. For breath analysis, we apply multiple regression analysis using the absorption spectra of oxygen, water, and acetone standard gas as explanatory variables to quantitate the concentration of acetone in breath. Based on human breath, we apply the standard addition method to obtain the measurement accuracy. The results suggest that the standard deviation is 0.074 ppm for healthy human breath with an acetone concentration of around 0.8 ppm and a precision of 0.026 ppm. We also monitor body fat burn based on breath acetone and confirm that breath acetone increases after exercise because it is a volatile byproduct of lipolysis.

scholarly journals Transmission of 61 C-band Channels over Record Distance of Hollow-Core-Fiber with L-band Interferers

2020 ◽  
pp. 1-1
Author(s):  
Antonino Nespola ◽  
Stefano Straullu ◽  
Thomas D. Bradley ◽  
Kerrianne Harrington ◽  
Hesham Sakr ◽  
...  
Keyword(s):  
Hollow Core ◽  
Core Fiber ◽  
L Band

scholarly journals Loading and spatially resolved characterization of a cold atomic ensemble inside a hollow-core fiber

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
Thorsten Peters ◽  
Leonid P. Yatsenko ◽  
Thomas Halfmann
Keyword(s):  
Atomic Ensemble ◽  
Hollow Core ◽  
Spatially Resolved ◽  
Core Fiber
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