Modal gain and lasing states in InAs/GaAs self-organized quantum dot lasers

P. W. Fry, L. Harris, S. R. Parnell, J. J. Finley, A. D. Ashmore, D. J. Mowbray, M. S. Skolnick, M. Hopkinson, G. Hill, J. C. Clark

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The modal gain of an InAs/GaAs self-organized quantum dot laser is determined from a measurement of the normal incidence, interband photocurrent. The maximum modal gain of the ground state transition is shown to have a value of (7 ± 3) cm-1, considerably smaller than typical values for comparable quantum well lasers. The photocurrent technique is demonstrated to be a convenient and simple method for determining the spectral form of the gain and for comparing the modal gain of different devices. The consequences of the small modal gain for the laser characteristics are discussed.

Original languageEnglish
Pages (from-to)615-617
Number of pages3
JournalJournal of Applied Physics
Volume87
Issue number1
DOIs
StatePublished - 1 Jan 2000
Externally publishedYes

Fingerprint

Dive into the research topics of 'Modal gain and lasing states in InAs/GaAs self-organized quantum dot lasers'. Together they form a unique fingerprint.

Cite this