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Optics Letters

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  • Vol. 24, Iss. 5 — Mar. 1, 1999
  • pp: 306–308

Amplifying volume in scattering media

Gijs van Soest, Makoto Tomita, and Ad Lagendijk  »View Author Affiliations


Optics Letters, Vol. 24, Issue 5, pp. 306-308 (1999)
http://dx.doi.org/10.1364/OL.24.000306


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Abstract

We investigate the influence of the excitation spot diameter on the laser threshold of a scattering amplifying medium. Fluorescence spectra are recorded from a suspension of TiO<sub>2</sub> scatterers in Sulforhodamine B dye. The threshold pump intensity becomes larger by a factor of 70 if the excitation beam diameter gets close to the mean free path<i>Ɩ</i>. This increase is explained by use of a simple model describing diffusion out of the amplifying volume and is confirmed by a Monte Carlo simulation.

© 1999 Optical Society of America

OCIS Codes
(140.2050) Lasers and laser optics : Dye lasers
(140.3380) Lasers and laser optics : Laser materials
(140.3410) Lasers and laser optics : Laser resonators
(290.4210) Scattering : Multiple scattering

Citation
Gijs van Soest, Makoto Tomita, and Ad Lagendijk, "Amplifying volume in scattering media," Opt. Lett. 24, 306-308 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-5-306


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References

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