Enhancing Gas Diffusion in Antiresonant Hollow-Core Fiber Gas Sensors Using Microchannels

In this paper, we analyze the performance of diffusion-based gas distribution in antiresonant hollow-core fiber-based gas absorption cells. Performed theoretical analysis was based on Fick’s second law using the OpenFOAM® software and finite volume method (FVM), followed by an experimental verificat...

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Bibliographic Details
Published in:Photonic sensors (Berlin) 2025-09, Vol.15 (3), p.250336-14, Article 250336
Main Authors: Kozioł, Paweł, Bojęś, Piotr, Jaworski, Piotr, Wu, Dakun, Yu, Fei, Krzempek, Karol
Format: Article
Language:English
Subjects:
Absorption
antiresonant hollow core fibers
Blood vessels
Diffusion rate
Finite volume method
Gas absorption
Gas detectors
gas diffusion measurement
Gas exchange
Gas sensors
Gaseous diffusion
Laser spectrometers
Lasers
Long fibers
Measurement Science and Instrumentation
microchannel
Microchannels
Micromachining
Microwaves
Optical Devices
Optical fiber sensor
Optics
Photonics
Physics
Physics and Astronomy
Regular
RF and Optical Engineering
side-slot
Simulation
Spectrum analysis
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Summary:In this paper, we analyze the performance of diffusion-based gas distribution in antiresonant hollow-core fiber-based gas absorption cells. Performed theoretical analysis was based on Fick’s second law using the OpenFOAM® software and finite volume method (FVM), followed by an experimental verification of the obtained simulations. The diffusion time was tested for a 1.25 m long fiber, with laser-micromachined microchannels. Full analysis of the correlation between the microchannel count, position, and separation on the rate at which the fiber-based gas cell was filled with the target gas was presented. Experimental results showed that with the proper microchannel configuration, the purely-diffusion-based gas exchange time in the 1.25 m fiber could be reduced from 6 h, down to 330 s. Obtained results correlated with the simulations, giving perspective for the development and implementation of novel miniaturized passively filled gas absorption cells for compact laser spectrometers.
ISSN:1674-9251
2190-7439
DOI:10.1007/s13320-025-0753-5