β factor in a random laser

Gijs van Soest; Ad Lagendijk

doi:10.1103/PhysRevE.65.047601

β factor in a random laser

Gijs van Soest, Ad Lagendijk

Complex Photonic Systems

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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 language	English
Article number	047601
Number of pages	4
Journal	Physical review E: Statistical physics, plasmas, fluids, and related interdisciplinary topics
Volume	65
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevE.65.047601
Publication status	Published - 2002

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METIS-207605

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10.1103/PhysRevE.65.047601

VanSoest2002factorFinal published version, 195 KB

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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.",

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AB - 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.

KW - METIS-207605

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DO - 10.1103/PhysRevE.65.047601

M3 - Article

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JO - Physical review E: covering statistical, nonlinear, biological, and soft matter physics

JF - Physical review E: covering statistical, nonlinear, biological, and soft matter physics

SN - 2470-0045

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ER -

β factor in a random laser

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