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Proceedings Paper

Spectral and modulation characteristics of tunable multielectrode DBR lasers
Author(s): Mario F. S. Ferreira; Jose Rodriguez daRocha; Joao Lemos Pinto
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Paper Abstract

The static tuning and the small-signal modulation characteristics of multielectrode DBR lasers are analysed. A theoretical model is presented to describe in particular the performance of a three electrode DBR laser with two electrodes in the active region and another electrode in the passive DBR region. Several direct modulation schemes are considered and nonlinear gain is taken into account. A nearly flat FM response over several GHz is observed by a nonuniform current injection and modulation of the lower carrier density section in the active region. A perfect cancellation of spurious intensity modulation together with the removal of the FM resonance peak seems to be possible by push-pull modulation of the active section with an appropriate current splitting ratio. However this situation does not provide generally ideal FM characteristics because of the thermal-effects. Tuning without distortion of the FM characteristics is an attractive feature of this device.

Paper Details

Date Published: 1 January 1991
PDF: 13 pages
Proc. SPIE 1372, Coherent Lightwave Communications: Fifth in a Series, (1 January 1991); doi: 10.1117/12.24905
Show Author Affiliations
Mario F. S. Ferreira, Univ. de Aveiro (Portugal)
Jose Rodriguez daRocha, Univ. de Aveiro (Portugal)
Joao Lemos Pinto, Univ. de Aveiro (Portugal)


Published in SPIE Proceedings Vol. 1372:
Coherent Lightwave Communications: Fifth in a Series
Harish R. Sunak; Roger C. Steele, Editor(s)

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