High Sensitivity All-Fibre Methane Sensor with Gas Permeable Teflon/Cryptophane-A Membrane

Ismaeel, Rand; Beaton, Alexander; Donko, Andrei; Talataisong, Wanvisa; Lee, Timothy J.; Beresna, Martynas; Mowlem, Matthew C.; Brambilla, Gilberto

doi:10.1109/cleoe-eqec.2019.8873125

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…Such sensors are essentially electromechanical devices with a mechanical deformation, or material change resulting in an alteration in the capacitance or resistance of the device. Membranes have also been coupled with optical sensing methods [ 66 , 67 , 68 ] to form optomechanical sensors.…”

Section: Mechanical Sensorsmentioning

confidence: 99%

The Development of Optomechanical Sensors—Integrating Diffractive Optical Structures for Enhanced Sensitivity

McGovern

Hernik

Grogan

et al. 2023

Sensors

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The term optomechanical sensors describes devices based on coupling the optical and mechanical sensing principles. The presence of a target analyte leads to a mechanical change, which, in turn, determines an alteration in the light propagation. Having higher sensitivity in comparison with the individual technologies upon which they are based, the optomechanical devices are used in biosensing, humidity, temperature, and gases detection. This perspective focuses on a particular class, namely on devices based on diffractive optical structures (DOS). Many configurations have been developed, including cantilever- and MEMS-type devices, fiber Bragg grating sensors, and cavity optomechanical sensing devices. These state-of-the-art sensors operate on the principle of a mechanical transducer coupled with a diffractive element resulting in a variation in the intensity or wavelength of the diffracted light in the presence of the target analyte. Therefore, as DOS can further enhance the sensitivity and selectivity, we present the individual mechanical and optical transducing methods and demonstrate how the DOS introduction can lead to an enhanced sensitivity and selectivity. Their (low-) cost manufacturing and their integration in new sensing platforms with great adaptability across many sensing areas are discussed, being foreseen that their implementation on wider application areas will further increase.

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Section: Mechanical Sensorsmentioning

confidence: 99%

The Development of Optomechanical Sensors—Integrating Diffractive Optical Structures for Enhanced Sensitivity

McGovern

Hernik

Grogan

et al. 2023

Sensors

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“…A sensitivity of 0.37 ± 0.04 [dB/%], defined as the contrast ratio between resonant modes at different outputs, in a range of methane concentration between 0% and 5%, was achieved. Ismaeel et al [35] designed a simple, low-cost, and compact all-fiber methane sensor consisting of a D-shaped cross section optical fiber in between two fiber Bragg gratings. The main improvement in this work was the coating of the fiber with a Teflon layer that was doped with cryptophane which has an affinity towards methane gas.…”

Section: Recent Research Developmentsmentioning

confidence: 99%

A Review of Methane Gas Detection Sensors: Recent Developments and Future Perspectives

et al. 2020

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Methane, the primary component of natural gas, is a significant contributor to global warming and climate change. It is a harmful greenhouse gas with an impact 28 times greater than carbon dioxide over a 100-year period. Preventing methane leakage from transmission pipelines and other oil and gas production activities is a possible solution to reduce methane emissions. In order to detect and resolve methane leaks, reliable and cost-effective sensors need to be researched and developed. This paper provides a comprehensive review of different types of methane detection sensors, including optical sensors, calorimetric sensors, pyroelectric sensors, semiconducting oxide sensors, and electrochemical sensors. The discussed material includes the definitions, mechanisms and recent developments of these sensors. A comparison between different methods, highlighting the advantages and disadvantages of each, is also presented to help address future research needs.

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“…Rand et al fabricated a methane gas sensor composed of two fiber Bragg gratings connected by a D-shaped polished optical fiber. A methane-sensitive film containing cryptophane-A was coated on the D-shaped plane [14]. The proposed sensor exhibits a sensitivity of 0.16 nm/ppm.…”

Section: Introductionmentioning

confidence: 99%

A sensitive methane gas sensor based on sagnac interferometer with a cryptophane-A film-coated birefringent photonic crystal fiber : design and FEM simulation

Li,

Chen,

et al. 2024

Phys. Scr.

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As being sensitive to methane gas, cryptophane-A is widely used in fiber optic methane gas sensors. In order to further improve the sensitivity, a Sagnac interference (SI) was constructed with a cryptophane-A film coated birefringent photonic crystal fiber (PCF) to realize the methane gas sensing. Cryptophane-A film absorbs the methane gas and as a result its refractive index decreases linearly with the increasing of methane gas concentration. Simulation results utilizing the finite element method demonstrate that sensitivity reaches 124.4 nm/% when the methane concentration ranges from 0% to 3.5%. The high sensitivity performance ensures a candidate of the designed sensor in early warning of methane gas leakage.

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High Sensitivity All-Fibre Methane Sensor with Gas Permeable Teflon/Cryptophane-A Membrane

Cited by 4 publications

References 4 publications

The Development of Optomechanical Sensors—Integrating Diffractive Optical Structures for Enhanced Sensitivity

The Development of Optomechanical Sensors—Integrating Diffractive Optical Structures for Enhanced Sensitivity

A Review of Methane Gas Detection Sensors: Recent Developments and Future Perspectives

A sensitive methane gas sensor based on sagnac interferometer with a cryptophane-A film-coated birefringent photonic crystal fiber : design and FEM simulation

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