Direct determination of main fibre Bragg grating parameters using OLCR

Author

Fonjallaz, P.-Y. ; Limberger, H.G. ; Salathé, R.P. ; Zimmer, Ch ; Gilgen, H.H.

Author_Institution

Lab. d´´Optique Appliquee, Ecole Polytech. Federale de Lausanne, Switzerland

Volume

141

Issue

2

fYear

1994

fDate

4/1/1994 12:00:00 AM

Firstpage

141

Lastpage

144

Abstract

Optical low coherence reflectometry (OLCR) is applied to the characterisation of homogeneous Bragg gratings written in single-mode optical fibres with a UV laser. This technique allows for the measurement of the spatial distribution of the field reflection coefficient within the fibre with a spatial resolution of 9 μm in the fibre material. A grating with a high spatial definition has been measured and its length precisely determined. The amplitude of the index modulation was then obtained by the absolute signal level just after the entrance of the grating on the calibrated OLCR spectrum. Thus, this method gives a direct information of the main fibre Bragg grating parameters, the length and the index modulation

Keywords

diffraction gratings; optical fibre testing; reflectometry; refractive index; absolute signal level; amplitude; calibrated OLCR spectrum; entrance; field reflection coefficient; homogeneous Bragg gratings; index modulation; length; main fibre Bragg grating parameters; optical low coherence reflectometry; single-mode optical fibres; spatial definition; spatial distribution; spatial resolution; ultraviolet laser;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:19949995

Filename

295497