Application of π/2 phase shifted Bragg grating for the longitudinal mode selection of single-frequency fibre lasers

Author

Kurkov, A.S. ; Rigal ; Ramecourt, D. ; Douay, M. ; Martinelli, G. ; Niay, P. ; Bernage, P. ; Guryanov, A. ; Gusovskii, D. ; Kobis, S. ; Zverev, Yu.

Author_Institution

Lab. de Dynamique Moleculaire et Photonique, Univ. des Sci. et Technol. de Lille I, Villeneuve d´´Ascq, France

Volume

4

fYear

1997

fDate

22-25 Sep 1997

Firstpage

49

Abstract

In this paper we propose a new type of fibre laser configuration which consists of closing an erbium-doped fibre laser cavity by two Bragg gratings (similarly to DBR laser). One of the grating has a Π/2 phase shift at the centre. In the case of passive fibre long Bragg grating with a Π/2 phase shift has narrow transmission peak in the centre of the reflection spectrum. In an active fibre, the spontaneous emission spectrum below threshold exhibits a maximum at the place of the peak in the centre of the reflection spectrum. That would give possibilities to obtain single-frequency oscillation with high output power provided by the long length of the laser cavity

Keywords

erbium; Π/2 phase shift; π/2 phase shifted Bragg grating; Bragg gratings; DBR laser; active fibre; below threshold; erbium-doped fibre laser cavity; fibre laser configuration; high output power; laser cavity; longitudinal mode selection; narrow transmission peak; passive fibre long Bragg grating; reflection spectrum; single-frequency fibre lasers; single-frequency oscillation; spontaneous emission spectrum;

fLanguage

English

Publisher

iet

Conference_Titel

Integrated Optics and Optical Fibre Communications, 11th International Conference on, and 23rd European Conference on Optical Communications (Conf. Publ. No.: 448)

Conference_Location

Edinburgh

ISSN

0537-9989

Print_ISBN

0-85296-697-0

Type

conf

DOI

10.1049/cp:19971579

Filename

628588