Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Enhanced Mach-Zehnder Interferometer Multimode–Single-Mode–Multimode Fiber Optic Refractive Index Sensor Based on Surface Plasmon Resonance

Version 1 : Received: 25 November 2021 / Approved: 29 November 2021 / Online: 29 November 2021 (15:19:20 CET)

How to cite: Akbarpour, Z.; Ahmadi, V.; Arabpour Roghabadi, F. Enhanced Mach-Zehnder Interferometer Multimode–Single-Mode–Multimode Fiber Optic Refractive Index Sensor Based on Surface Plasmon Resonance. Preprints 2021, 2021110544 (doi: 10.20944/preprints202111.0544.v1). Akbarpour, Z.; Ahmadi, V.; Arabpour Roghabadi, F. Enhanced Mach-Zehnder Interferometer Multimode–Single-Mode–Multimode Fiber Optic Refractive Index Sensor Based on Surface Plasmon Resonance. Preprints 2021, 2021110544 (doi: 10.20944/preprints202111.0544.v1).

Abstract

In this paper, an all-fiber Mach-Zehnder interferometer (MZI) sensor for refractive index (RI) measuring is presented, which is based on Multimode–Single-mode–Multimode (MSM) fiber. The effects of both reducing the radius of the sensing part and the surface plasmon resonance (SPR) on its efficiency are investigated. Increasing the interaction of high-order modes with external media, caused by etching the cladding layer of the single-mode fiber part, significantly improves the sensitivity. Both wavelength and intensity interrogation approaches are employed to study the Multimode–etched Single-mode–Multimode (MESM) fiber sensor. The intensity and the wavelength sensitivities for the RI measurement in the range of 1.428-1.458 are obtained as -2308.92 %/RIU and 1313.14 nm/RIU, respectively. Finally, the MESM-SPR sensor is proposed and characterized. Results exhibit high performance in the RI range of 1.333 to 1.357, in which the sensitivity of 1433 nm/RIU is achieved. The advantages like low cost, high sensitivity, and simple fabrication methods make these sensors promising devices for chemical, food industry, and biosensing applications.

Keywords

Fiber optic sensor; Refractive index; Mach-Zehnder; Surface plasmon resonance; Etching

Subject

PHYSICAL SCIENCES, Optics

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.