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Related Experiment Video

Updated: May 10, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

Optical Fiber Methane Sensor Based on Mach-Zehnder Interferometer Induced by Multimode Interference.

Fuling Yang¹, Sicheng Zong¹, Xinghan Li¹

¹School of Mechanical and Electrical Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China.

|April 26, 2025

Summary

This summary is machine-generated.

A novel optical methane sensor utilizes a multimode interference fiber coated with a zeolitic imidazolate framework-8/Polydimethylsiloxane (ZIF-8/PDMS) film for enhanced methane detection. This sensor demonstrates high sensitivity and a low limit of detection, offering potential for practical methane monitoring applications.

Keywords:

Mach–Zehnder interferometer methane sensor multimode interference optical fiber

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Last Updated: May 10, 2025

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Published on: April 26, 2014

Area of Science:

Materials Science
Optical Engineering
Chemical Sensing

Background:

Accurate methane detection is crucial for safety and environmental monitoring.
Existing methane sensors face challenges in sensitivity, selectivity, and response time.
Optical fiber sensors offer advantages like remote sensing and immunity to electromagnetic interference.

Purpose of the Study:

To design and fabricate a novel methane sensor based on multimode interference fiber.
To investigate the sensing performance of a zeolitic imidazolate framework-8/Polydimethylsiloxane (ZIF-8/PDMS) composite film for methane detection.
To analyze the factors influencing the sensor's sensitivity and optimize its parameters.

Main Methods:

Fabrication of a methane-sensitive single mode fiber (MS-SMF) by coating a ZIF-8/PDMS film onto a thin-diameter SMF.
Design and modeling of an interferometer based on multimode interference.
Experimental testing of the fabricated sensor on a methane sensor platform across various concentrations (0-4%).

Main Results:

The optimized sensor achieved a sensitivity of 2.364 nm/% for methane detection.
The limit of detection was determined to be approximately 338 ppm.
The sensor exhibited an average response time of 30 s and a recovery time of 45 s, with low temperature sensitivity (0.026 nm/°C).

Conclusions:

The developed optical methane sensor demonstrates high performance and validates the proposed sensor model.
The ZIF-8/PDMS composite film shows significant potential for sensitive and selective methane detection.
This study presents a promising new design for optical methane sensors with broad application prospects.