Lasing threshold behavior of microcavities: Observation by polarization and spectroscopic measurements

Xiaomei Wang, R. A. Linke, G. Devlin, H. Yokoyama

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

We propose and demonstrate the use of polarization to determine the threshold of an optical microcavity when the output power versus pump power does not show a sharp threshold. A lasing threshold is observed via a sharp transition in the polarization and a simultaneous reduction in emission linewidth. We find that dipole angular diffusion in a dye gain medium has a significant effect on the polarization of the emission. A theoretical model including the diffusion process is presented. Quantitative agreement with the measurements is obtained.

Original languageEnglish
Pages (from-to)R2488-R2491
JournalPhysical Review A
Volume47
Issue number4
DOIs
Publication statusPublished - 1993
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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