Modeling and experimental demonstration of ultracompact multiwavelength distributed Fabry-Pérot fiber Lasers

Brochu, Guillaume, LaRochelle, Sophie and Slavík, Radan (2005) Modeling and experimental demonstration of ultracompact multiwavelength distributed Fabry-Pérot fiber Lasers. Journal of Lightwave Technology, 23 (1), 44-53. (doi:10.1109/JLT.2004.840345).

Abstract

This paper presents a complete model for the design and optimization of multiwavelength distributed Fabry-Pérot (DFP) fiber lasers that are made by superimposing two chirped fiber Bragg gratings in a photosensitive codoped erbium-ytterbium (Er-Yb) fiber. The model is based on a matrix formulation of coupled-mode equations taking into account the chirped grating superstructure and including a spectrally resolved gain medium. The performed analysis reveals that the signal power of each channel is strongly localized near a minimum of the superstructured-grating envelope. As a consequence, the overlap between the power distributions in neighboring cavities is small, thus reducing the effect of cross-gain saturation and allowing a high number of channels in a short piece of fiber. The simulations also show how the saturation of the cross-relaxation mechanism between ytterbium and erbium leads to flat output spectra without the need for an additional equalization scheme such as a complex grating apodization profile. Furthermore, to validate the theoretical model, we present the experimental realization and characterization of a multiwavelength laser emitting in a single-mode and single-polarization over 16 wavelengths spaced by 50 GHz and with a total output power of 52 mW.

This record has no associated files available for download.

Contributors

Author: Radan Slavík

Download statistics