Multimode interference tapered fiber refractive index sensors

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Biazoli, CR (Author) Other; Susana Silva (Author) Other; Franco, MAR (Author) Other; Frazao, O (Author) FCUP; Cordeiro, CMB (Author) Other

Journal

Title: Applied Optics

Vol. 51 No. 16

Pages: 5941-5945

ISSN: 1559-128X

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 59 Citations

Scopus - 63 Citations

Other information

Authenticus ID: P-002-6W5

DOI: 10.1364/ao.51.005941

Abstract (EN): Real-time monitoring of the fabrication process of tapering down a multimode-interference-based fiber structure is presented. The device is composed of a pure silica multimode fiber ( MMF) with an initial 125 mu m diameter spliced between two single-mode fibers. The process allows a thin MMF with adjustable parameters to obtain a high signal transmittance, arising from constructive interference among the guided modes at the output end of the MMF. Tapered structures with waist diameters as low as 55 mu m were easily fabricated without the limitation of fragile splices or difficulty in controlling lateral fiber alignments. The sensing device is shown to be sensitive to the external environment, and a maximum sensitivity of 2946 nm/refractive index unit in the refractive index range of 1.42-1.43 was attained. (c) 2012 Optical Society of America

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5