Strain sensitivity enhancement in suspended core fiber tapers

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

Authors

andré, rm (Author) Other; silva, so (Author) Other; becker, m (Author) Other; schuster, k (Author) Other; rothardt, m (Author) Other; bartelt, h (Author) Other; marques, mb (Author) FCUP; frazão, o (Author) Other

Journal

Title: Photonic Sensors

Vol. 3 No. 1

Pages: 118-123

ISSN: 1674-9251

Publisher: Springer Nature

Indexing

ISI Web of Knowledge

Scopus - 7 Citations

Other information

Authenticus ID: P-008-DAW

DOI: 10.1007/s13320-012-0059-2

Abstract (EN): Suspended core fiber tapers with different cross sections (with diameters from 70 ¿m to 120 ¿m) are produced by filament heating. Before obtaining the taper, the spectral behavior of the suspended core fiber is a multimode interference structure. When the taper is made, an intermodal interference between a few modes is observed. This effect is clearly visible for low taper core dimensions. Since the core and cladding do not collapse, two taper regions exist, one in the core and the other in the cladding. The cladding taper does not affect the light transmission, only the core is reduced to a microtaper. The spectral response of the microtaper based-suspended core fiber is similar to a beat of two interferometers. The strain is applied to the microtaper, and with the reduction in the transverse area, an increase in sensitivity is observed. When the taper is immersed in a liquid with a different index of refraction or subjected to temperature variations, no spectral change occurs. © 2012 The Author(s).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6