Local supermode analysis of tapered fibre sensor

Author

Besley, J.A. ; Love, J.D. ; Scelsi, G.B.

Author_Institution

Opt. Sci. Centre, Australian Nat. Univ., Canberra, ACT, Australia

Volume

144

Issue

6

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

383

Lastpage

388

Abstract

The authors investigate the performance of an evanescent-field fibre sensor made from standard single-mode optical fibre with a tapered cladding region, upon which a thin attenuating material coating is deposited. The authors´ method involves calculating the supermodes of the complete core-cladding-coating-air structure locally at each point along the taper and studying the evolution of the supermode guided power along the sensor. Results are compared with those from numerical finite difference scheme; and also used to interpret experimental results obtained for a taper with a thin layer of sulphur deposited by electrical discharge in an atmosphere of SF₆

Keywords

coupled mode analysis; fibre optic sensors; optical fibre cladding; optical fibre theory; refractive index; S; S-layer; SF₆; electrical discharge; evanescent-field fibre sensor; local complete core-cladding-coating-air structure supermodes; local supermode analysis; numerical finite difference scheme; standard single-mode optical fibre; supermode guided power; tapered cladding region; tapered fibre sensor; thin attenuating material coating;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:19971609

Filename

656361