Large- and small-signal dynamic behavior of high-speed dual-polarization quantum-well semiconductor lasers

Linh V.T. Nguyen, Arthur J. Lowery, Dalma Novak

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)


In this paper, the transmission-line laser model is modified to model both transverse-electric (TE) and transverse-magnetic (TM) modes so that it is applicable to quantum-well (QW) dual-polarization lasers and polarization-insensitive semiconductor optical amplifiers (SOA's). The effects of carrier transport are also included in the model. The resulting dual-polarization transmission-line laser model is used to study large-and small-signal dynamic behavior of dual-polarization lasers. We find from large-signal simulations that the polarization asymmetry (ratio of the transverse-modal powers) varies on a nanosecond time scale in dual-polarization single-quantum-well (SQW) devices. We show that unequal transverse-modal differential gains and gain nonlinearities are responsible for this temporal polarization asymmetry. In addition, our numerical simulations show that the steady-state polarization asymmetry is a strong function of the gain nonlinearity. Small-signal dynamic simulations show that the modulation response of the polarization-unresolved output of dual-polarization SQW lasers follows that of the transverse mode with the lowest gain nonlinearity coefficient, regardless of the transverse-modal differential gains.

Original languageEnglish
Pages (from-to)279-289
Number of pages11
JournalIEEE Journal of Selected Topics in Quantum Electronics
Issue number2
Publication statusPublished - 1 Apr 1997
Externally publishedYes


  • Dual polarization
  • Laser dynamics and modeling
  • Quantum well
  • Semiconductor lasers

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