Extending the direct laser modulation bandwidth by exploiting the photon-photon resonance: modeling, simulations and experiments

M. Dumitrescu; A. Laakso; J. Viheriala; M. Kamp; P. Bardella; G. Eisenstein

doi:10.1117/12.2004976

14 March 2013 Extending the direct laser modulation bandwidth by exploiting the photon-photon resonance: modeling, simulations and experiments

M. Dumitrescu, A. Laakso, J. Viheriala, M. Kamp, P. Bardella, G. Eisenstein

Author Affiliations +

Proceedings Volume 8619, Physics and Simulation of Optoelectronic Devices XXI; 86190A (2013) https://doi.org/10.1117/12.2004976
Event: SPIE OPTO, 2013, San Francisco, California, United States

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.

Citation Download Citation

M. Dumitrescu, A. Laakso, J. Viheriala, M. Kamp, P. Bardella, and 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); https://doi.org/10.1117/12.2004976

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KEYWORDS

Modulation

Optical simulations

Phase shift keying

Eye

Modulation transfer functions

Terahertz radiation

Optical design

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