Modeling and experimental demonstration of ultracompact multiwavelength distributed Fabry-Perot fiber lasers

被引:30
作者
Brochu, G [1 ]
LaRochelle, S [1 ]
Slavík, R [1 ]
机构
[1] Univ Laval, COPL, Dept Genie Elect & Genie Informat, Quebec City, PQ G1K 7P4, Canada
关键词
distributed feedback lasers (DFB); optical fiber Bragg gratings; optical fiber lasers;
D O I
10.1109/JLT.2004.840345
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper presents a complete model for the design and optimization of multiwavelength distributed Fabry-Perot (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.
引用
收藏
页码:44 / 53
页数:10
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