Multimodal Interferometer Based on a Suspended Core Fiber for Simultaneous Measurement of Physical Parameters

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Rota Rodrigo, S (Author) Other; Lopez Amo, M (Author) Other; Kobelke, J (Author) Other; Schuster, K (Author) Other; Santos, JL (Author) FCUP; Frazao, O (Author) FCUP

Journal

Title: Journal of Lightwave Technology

Vol. 33

Pages: 2468-2473

ISSN: 0733-8724

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 22 Citations

Scopus - 26 Citations

Other information

Authenticus ID: P-00G-C5K

DOI: 10.1109/jlt.2014.2375896

Abstract (EN): In this study, a multimodal interferometer based on a suspended core photonic crystal fiber (PCF) for simultaneous strain and temperature measurements is proposed. The structure is also employed for angle measurements. The sensor comprises a 3-mm-suspended core PCF between SMFs and is based on the combination of two multimodal interferences with different frequency fringe patterns. The interferometric patterns show different sensitivity responses to strain and temperature. Through a low-pass frequency filtering of the detected spectrum, the wavelength shift of the two patterns can be measured allowing the discrimination of strain and temperature effects with resolutions of 0.45 degrees C and 4.02 mu epsilon, respectively. The sensor is also characterized for angle measurements showing a maximum sensitivity of 9.17 pm/degrees in the range from 0 degrees to 90 degrees. It is demonstrated that with this sensing structure is possible to obtain simultaneous measurement of bend angle and temperature with resolutions of 1.69 degrees and 0.92 degrees C, respectively.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6