J. Phys. III France
Volume 5, Numéro 3, March 1995
Page(s) 237 - 249
DOI: 10.1051/jp3:1995123
J. Phys. III France 5 (1995) 237-249

Design of Grating-Based Fiber Lasers : Power and Spectral Behaviors

D. Pureur1, M. Douay1, P. Bernage1, P. Niay1, E. Delevaque2, S. Boj2, J. F. Bayon2 and H. Poignant2

1  Laboratoire de Dynamique Moléculaire et Photonique U.R.A. 779, Université des Sciences et Technologies de Lille, France
2  France Télécom, C.N.E.T. Lannion, France

(Received 2 May 1994, accepted 9 August 1994)

The spectral and power characteristics of Nd 3+ doped silica-based fiber lasers utilizing two intracore Bragg grating reflectors have been investigated. The operation of low-threshold, high efficiency Nd 3+ doped fiber lasers are reported. The frequency of these lasers can be tuned to resonance with several absorption lines of atomic or molecular species. Coupled cavity effects have been used to reduce the linewidth of the laser emission and to carry out a single model Nd 3+ fiber laser. The influence of the medium birefringence on the laser emission in a low and in a Hi-Bi fiber is presented. Recently, a new photorefractive effect occurring in cerium doped fluorozirconate fibers has been demonstrated in our laboratories. To demonstrate the potentiality of Bragg gratings to fluorozirconate fiber technology, a fiber laser using a Bragg reflector written in a Ce-Er codoped ZBLALi fiber is reported.

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