14 March 2013 Extending the direct laser modulation bandwidth by exploiting the photon-photon resonance: modeling, simulations and experiments
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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.
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M. Dumitrescu, M. Dumitrescu, A. Laakso, A. Laakso, J. Viheriala, J. Viheriala, M. Kamp, M. Kamp, P. Bardella, P. Bardella, G. Eisenstein, G. Eisenstein, } "Extending the direct laser modulation bandwidth by exploiting the photon-photon resonance: modeling, simulations and experiments", Proc. SPIE 8619, Physics and Simulation of Optoelectronic Devices XXI, 86190A (14 March 2013); doi: 10.1117/12.2004976; https://doi.org/10.1117/12.2004976
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