Direct modulation characteristics of composite resonator vertical-cavity lasers

Daniel M. Grasso, Darwin K. Serkland, Gregory M. Peake, Kent M. Geib, Kent D. Choquette

Research output: Contribution to journalArticlepeer-review


We report the small-signal modulation characteristics of a monolithic dual resonator vertical cavity surface emitting laser. The modulation response is described by a system of rate equations with two independent carrier populations and a single longitudinal optical mode. The independent optical overlaps and differential gains of the two active regions can each be adjusted to maximize the output response. We show that under certain conditions, the composite resonator may achieve a higher bandwidth than a single cavity laser with the same photon density. We find the relaxation oscillation frequency to depend mainly on the total photon density and not the individual currents in the two cavities. With appropriate current injection, the composite resonator laser achieves a maximum -3-dB bandwidth of 12.5 GHz and a maximum modulation current efficiency factor of approximately 5 GHz/ma1/2.

Original languageEnglish (US)
Pages (from-to)1248-1254
Number of pages7
JournalIEEE Journal of Quantum Electronics
Issue number12
StatePublished - Dec 2006


  • Composite resonator
  • Coupled cavity
  • Modulation
  • Vertical-cavity laser

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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