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Proceedings Paper

Extending the direct laser modulation bandwidth by exploiting the photon-photon resonance: modeling, simulations and experiments
Author(s): M. Dumitrescu; A. Laakso; J. Viheriala; M. Kamp; P. Bardella; G. Eisenstein
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Paper Abstract

The direct laser modulation bandwidth can be extended substantially by introducing a supplementary photon-photon resonance (PPR) at a higher frequency than the carrier-photon resonance (CPR). The paper presents a modified rate equation model that takes into account the PPR by treating the longitudinal confinement factor as a dynamic variable. The conditions required for obtaining a strong PPR and an enhancement of the small-signal modulation bandwidth are analyzed and experimental results confirming the model are presented. Since the small-signal modulation bandwidth may not be indicative of the large-signal modulation capability, particularly in case of a small-signal modulation response with substantial variations across the bandwidth, we have also analyzed the influence of the PPR-enhanced small-signal modulation response shape on the large-signal modulation capability as well as the methods that can be employed to flatten the small-signal modulation transfer function between the CPR and PPR.

Paper Details

Date Published: 14 March 2013
PDF: 7 pages
Proc. SPIE 8619, Physics and Simulation of Optoelectronic Devices XXI, 86190A (14 March 2013); doi: 10.1117/12.2004976
Show Author Affiliations
M. Dumitrescu, Tampere Univ. of Technology (Finland)
A. Laakso, Tampere Univ. of Technology (Finland)
J. Viheriala, Tampere Univ. of Technology (Finland)
M. Kamp, Julius-Maximilians-Univ. Würzburg (Germany)
P. Bardella, Politecnico di Torino (Italy)
G. Eisenstein, Technion-Israel Institute of Technology (Israel)

Published in SPIE Proceedings Vol. 8619:
Physics and Simulation of Optoelectronic Devices XXI
Bernd Witzigmann; Marek Osinski; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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