Strain-Temperature Discrimination Using Multimode Interference in Tapered Fiber

• Type: Article in International Scientific Journal
• Date: 2013

Authors

andre, rm (Author) Other; biazoli, cr (Author) Other; silva, so (Author) Other; marques, mb (Author) FCUP; cordeiro, cmb (Author) Other; frazao, o (Author) Other

Journal

Title: IEEE Photonics Technology Letters

Vol. 25

Pages: 155-158

ISSN: 1041-1135

Publisher: IEEE

Indexing

ISI Web of Knowledge - 32 Citations

Scopus - 38 Citations

Other information

Authenticus ID: P-002-186

DOI: 10.1109/lpt.2012.2230617

Abstract (EN): Tapering single-mode-multimode-single-mode structures to enhance sensitivity is proposed and experimentally demonstrated. 50-mm-long coreless multimode fiber sections are spliced between single-mode fibers (SMFs) and tapered. They are characterized in strain, and an increase in strain sensitivity is obtained with taper diameter reduction. Sensitivities as high as -23.69 pm/mu epsilon for the 15-mu m taper are attained. Temperature sensitivities also depend on taper diameter. A combination of two different diameter tapered SMF MMF-SMF structures, with cross-sensitivity to strain and temperature, is proposed as a sensing system for the simultaneous measurement of strain and temperature with resolutions of +/-5.6 mu epsilon and +/-1.6 degrees C, respectively. A good condition number of 3.16 is achieved with this sensing structure.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4