IEEE Photonics Journal (Jan 2013)

Distinct Lasing Operation From Chirped InAs/InP Quantum-Dash Laser

  • M. Z. M. Khan,
  • T. K. Ng,
  • Chi-Sen Lee,
  • D. H. Anjum,
  • D. Cha,
  • P. Bhattacharya,
  • B. S. Ooi

DOI
https://doi.org/10.1109/JPHOT.2013.2272781
Journal volume & issue
Vol. 5, no. 4
pp. 1501308 – 1501308

Abstract

Read online

We study the enhanced inhomogeneity across the InAs quantum-dash (Qdash) layers by incorporating a chirped AlGaInAs barrier thickness in the InAs/InP laser structure. The lasing operation is investigated via Fabry-Pérot ridge-waveguide laser characterization, which shows a peculiar behavior under quasi-continuous-wave (QCW) operation. Continuous energy transfer between different dash ensembles initiated quenching of lasing action among certain dash groups, causing a reduced intensity gap in the lasing spectra. We discuss these characteristics in terms of the quasi-zero-dimensional density of states (DOS) of dashes and the active region inhomogeneity.

Keywords