Enhancing the 3-dB bandwidth via the gain-lever effect in quantum-dot lasers

Y. Li, N. A. Naderi, V. Kovanis, L. F. Lester

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


We investigate the small-signal modulation response of two-section, gain-lever, quantum-dot semiconductor lasers. A three-pole modulation function is derived from a 3-D set of rate equations, and a 70% 3-dB bandwidth enhancement is computed and experimentally realized in an undoped quantum-dot gain-lever laser under extreme asymmetric-bias conditions. Finally, it is demonstrated that the 3-dB bandwidth is three times the free-running relaxation oscillation frequency in these types of laser structures, as opposed to 1.55 times in the case of conventional single-section lasers.

Original languageEnglish
Article number5446332
Pages (from-to)321-329
Number of pages9
JournalIEEE Photonics Journal
Issue number3
Publication statusPublished - 2010


  • Gain lever
  • Modulation bandwidth
  • Quantum dot

ASJC Scopus subject areas

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

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