β factor in a random laser

Gijs van Soest, Ad Lagendijk

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

We develop a definition for the β factor, the fraction of spontaneous emission that seeds the laser process, for a random laser. With the wavelength-dependence of the gain (and potentially scattering) being the only possible criterion in the competition between gain and loss, our concept of β is based on the spectral properties of the spontaneous emission and laser light. We find β≈0.1. We discuss the apparent similarities and differences between the β for a cavity and a random laser.
Original languageEnglish
Article number047601
Number of pages4
JournalPhysical review E: Statistical physics, plasmas, fluids, and related interdisciplinary topics
Volume65
Issue number4
DOIs
Publication statusPublished - 2002

Keywords

  • METIS-207605

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