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Optics Letters

Optics Letters


  • Vol. 21, Iss. 16 — Aug. 15, 1996
  • pp: 1277–1279

Competition between two lasing modes of Sulforhodamine 640 in highly scattering media

W. L. Sha, C.-H. Liu, Feng Liu, and R. R. Alfano  »View Author Affiliations

Optics Letters, Vol. 21, Issue 16, pp. 1277-1279 (1996)

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Two lasing modes are observed for Sulforhodamine 640 in highly scattering media pumped by 3-ns 532-nm laser pulses. The stimulated-emission thresholds are found to depend on both concentration of laser dye and scattering particle density. At 2.5 × 10−2 M dye solution with TiO2 scattering nanoparticles from 5 × 109 cm−3 to 1011 cm−3, the thresholds are found to decrease by more than 2 orders of magnitude. The dominating lasing modes are found to switch from 650 to 620 nm with the increase of density of scatterers.

© 1996 Optical Society of America

Original Manuscript: January 1, 1996
Published: August 15, 1996

W. L. Sha, C.-H. Liu, Feng Liu, and R. R. Alfano, "Competition between two lasing modes of Sulforhodamine 640 in highly scattering media," Opt. Lett. 21, 1277-1279 (1996)

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