Work

Ultrafast and Miniature In-Situ Dissolved Gas Sensing Using a Membrane-Free Hydrophobic Hollow-Core Fiber

Year: 2026

Type: article

Abstract: Conventional in situ dissolved-gas optical sensors predominantly depend on complex gas–liquid separation apparatuses, including gas membrane contactors (GMCs) for gas extraction. However, membrane diffusion is inherently slow, often demanding active vacuum pumping or carrier gas purging that increase system size and power consumption. The membranes also suffer from poor accuracy and thus require routine calibration. Here, we report an ultra-compact, membrane-free sensing architecture based on a hollow-core anti-resonant fiber (HC-ARF) featuring laser-machined microchannels and a hydrophobically modified surface. The sensor achieves an underwater response time of only 10 s via direct liquid–gas interfacial diffusion, which is as quick as dry gas measurements in open air.

Source: Photonics

DOI: 10.3390/photonics13111051

Authors: Chenyu Yao, Guangjie Cheng, Hongkai Zhao, Xian Zhao

Institution: Shandong University

Language: English

Topic: Advanced Fiber Optic Sensors

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funders: National Natural Science Foundation of China, Natural Science Foundation of Shandong Province