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Proceedings Paper

Small-signal dynamic response of quantum-dot lasers with asymmetric barrier layers (Conference Presentation)

Paper Abstract

The small-signal dynamic response of quantum dot (QD) lasers with asymmetric barrier layers (ABLs) is studied. The modulation bandwidth of this novel type of laser is shown to have a maximum as a function of the dc component of the pump current and parameters of the structure. This provides a clear path for optimizing the laser structure to enhance its bandwidth. The effect of non-instantaneous capture of electrons and holes into QDs on the modulation bandwidth is studied. The maximum bandwidth and the optimum dc injection current at which it is attained are calculated as functions of the capture cross-section. The optimum dc injection current is shown to be considerably lower in ABL QD lasers as compared to conventional QD lasers, i.e., the maximum bandwidth is easier to attain in ABL QD lasers.

Paper Details

Date Published: 9 March 2020
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Proc. SPIE 11274, Physics and Simulation of Optoelectronic Devices XXVIII, 112740R (9 March 2020); doi: 10.1117/12.2544019
Show Author Affiliations
Levon V. Asryan, Virginia Polytechnic Institute and State Univ. (United States)
John L. Monk, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 11274:
Physics and Simulation of Optoelectronic Devices XXVIII
Bernd Witzigmann; Marek Osiński; Yasuhiko Arakawa, Editor(s)

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