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Article Dans Une Revue Applied Physics Letters Année : 2014

Phase-amplitude coupling characteristics in directly modulated quantum dot lasers

Résumé

We present a semi-analytical model for studying the phase-amplitude coupling (a-factor) in quantum dot (QD) semiconductor lasers, which takes into account the influence of carrier populations in the excited state and in the two-dimensional carrier reservoir on the refractive index change. Calculations of the a-factor based on the amplified spontaneous emission method and on the "FM/AM" technique are both investigated. It is shown that the a-factor of a QD laser strongly depends on the energy sepa-ration between the ground state and the off-resonant states. Through band structure engineering, the a-factor can be reduced by enlarging this energy separation. V C 2014 AIP Publishing LLC.
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hal-01091745 , version 1 (08-12-2014)

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Cheng Wang, M Osiński, J Even, F Grillot. Phase-amplitude coupling characteristics in directly modulated quantum dot lasers. Applied Physics Letters, 2014, 105 (22), pp.233103 - 21105. ⟨10.1063/1.4903493⟩. ⟨hal-01091745⟩
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