Spectral Linewidth of DFB Lasers Including the Effects of Spatial Holeburning and Nonuniform Current Injection

X. Pan; H. Olesen; B. Tromborg

doi:10.1109/68.54690

Spectral Linewidth of DFB Lasers Including the Effects of Spatial Holeburning and Nonuniform Current Injection

X. Pan, H. Olesen, B. Tromborg

Research output: Contribution to journal › Journal article › Research › peer-review

42 Citations (Scopus)

Abstract

A new analytic expression for the linewidth of DFB lasers is derived. Local fluctuations in carrier density are shown to give a significant contribution to laser linewidth in the presence of spatial holeburning. In a single-electrode DFB laser the effect can be avoided by careful optimization of the Ω-product, but for a multielectrode DFB laser the linewidth can also be reduced by adjusting the injected current profile to compensate for spatial holeburning. Numerical results for a three-electrode λ/4-shifted DFB laser are presented.

Original language	English
Journal	IEEE Photonics Technology Letters
Volume	2
Issue number	5
Pages (from-to)	312-315
Number of pages	4
ISSN	1041-1135
DOIs	https://doi.org/10.1109/68.54690
Publication status	Published - May 1990
Externally published	Yes

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abstract = "A new analytic expression for the linewidth of DFB lasers is derived. Local fluctuations in carrier density are shown to give a significant contribution to laser linewidth in the presence of spatial holeburning. In a single-electrode DFB laser the effect can be avoided by careful optimization of the Ω-product, but for a multielectrode DFB laser the linewidth can also be reduced by adjusting the injected current profile to compensate for spatial holeburning. Numerical results for a three-electrode λ/4-shifted DFB laser are presented.",

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N2 - A new analytic expression for the linewidth of DFB lasers is derived. Local fluctuations in carrier density are shown to give a significant contribution to laser linewidth in the presence of spatial holeburning. In a single-electrode DFB laser the effect can be avoided by careful optimization of the Ω-product, but for a multielectrode DFB laser the linewidth can also be reduced by adjusting the injected current profile to compensate for spatial holeburning. Numerical results for a three-electrode λ/4-shifted DFB laser are presented.

AB - A new analytic expression for the linewidth of DFB lasers is derived. Local fluctuations in carrier density are shown to give a significant contribution to laser linewidth in the presence of spatial holeburning. In a single-electrode DFB laser the effect can be avoided by careful optimization of the Ω-product, but for a multielectrode DFB laser the linewidth can also be reduced by adjusting the injected current profile to compensate for spatial holeburning. Numerical results for a three-electrode λ/4-shifted DFB laser are presented.

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Spectral Linewidth of DFB Lasers Including the Effects of Spatial Holeburning and Nonuniform Current Injection

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