Rate equation analysis of injection-locked quantum cascade lasers

Cheng Wang, Frédéric Grillot, Vassilios Kovanis, Jacky Even

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The modulation properties of optical injection-locked quantum cascade lasers (QCLs) are investigated theoretically via a simple low dimensional rate equation model. It is found that both strong injection level and positive optical frequency detuning increase the modulation bandwidth, while a large linewidth enhancement factor (LEF) contributes to the enhancement of the peak magnitude in the intensity modulation (IM) response. As opposed to conventional injection-locked interband lasers, it is demonstrated that no dip occurs in the QCL's IM response, which is beneficial for a series of broadband microwave photonic applications. Computations also show that the value of the LEF can critically modify both the locking and stability regions on the optical frequency detuning injection level map.

Original languageEnglish
Article number063104
JournalJournal of Applied Physics
Volume113
Issue number6
DOIs
Publication statusPublished - Feb 14 2013
Externally publishedYes

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quantum cascade lasers
injection
modulation
augmentation
locking
photonics
broadband
bandwidth
microwaves
lasers

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Rate equation analysis of injection-locked quantum cascade lasers. / Wang, Cheng; Grillot, Frédéric; Kovanis, Vassilios; Even, Jacky.

In: Journal of Applied Physics, Vol. 113, No. 6, 063104, 14.02.2013.

Research output: Contribution to journalArticle

Wang, Cheng ; Grillot, Frédéric ; Kovanis, Vassilios ; Even, Jacky. / Rate equation analysis of injection-locked quantum cascade lasers. In: Journal of Applied Physics. 2013 ; Vol. 113, No. 6.
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