Enhanced modulation characteristics in broken symmetric coupled microring lasers

Optics Express
Chi XuPatrick LiKamWa

Abstract

The dynamical behavior of broken symmetric coupled cavity lasers is theoretically investigated. The frequency response of this class of lasers is obtained using small signal analysis under direct modulation. Our model predicts a modulation bandwidth enhancement as a broken symmetric laser, operating in the parity-time (PT) symmetry and non-PT symmetry domains. This theoretical prediction is numerically examined in a laser system based on an InGaAs quantum dot platform. Our results clearly show that in these structures, in addition to the injection current, the gain-loss contrast can be used as a new degree of freedom in order to control the characteristic poles of the frequency response function.

References

Mar 21, 2008·Physical Review Letters·K G MakrisZ H Musslimani
May 13, 2009·Optics Express·Erwin K LauMing C Wu
Jun 28, 2011·Physical Review Letters·Zin LinDemetrios N Christodoulides
Aug 10, 2012·Nature·Alois RegensburgerUlf Peschel
Nov 22, 2014·Science·Liang FengXiang Zhang
Nov 22, 2014·Science·Hossein HodaeiMercedeh Khajavikhan
Mar 18, 2017·Physical Review Letters·Absar U HassanDemetrios N Christodoulides
Aug 11, 2017·Nature·Hossein HodaeiMercedeh Khajavikhan
Aug 11, 2017·Nature·Weijian ChenLan Yang
Nov 25, 2018·Optics Express·Jinhan RenMercedeh Khajavikhan

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