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Article
Interplay Between Amplification and Absorption in Diffusive Random Lasers
SPIE Proceedings: Complex Mediums VI: Light and Complexity
  • Alexey Yamilov, Missouri University of Science and Technology
  • X. Wu
  • Alexander Burin
  • Hui Cao
Abstract

We investigate the lasing modes in diffusive random media with local pumping. The reabsorption of emitter light suppresses the feedback from the unpumped part of the sample and effectively reduces the system size. The lasing modes are dramatically different from the quasimodes of the passive system (without gain or absorption). Even if all the quasimodes of a passive diffusive system are extended across the entire sample, the lasing modes are still confined in the pumped volume with an exponential tail outside it. The reduction of effective system volume by absoption broadens the distribution of decay rates of quasimodes and facilitates the occurrence of discrete lasing peaks.

Department(s)
Physics
Keywords and Phrases
  • Amplification,
  • Disordered System,
  • Optical Scattering,
  • Random Laser,
  • Scattering
Library of Congress Subject Headings
Lasers
Light absorption
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2005 SPIE -- The International Society for Optical Engineering, All rights reserved.
Publication Date
1-1-2005
Disciplines
Citation Information
Alexey Yamilov, X. Wu, Alexander Burin and Hui Cao. "Interplay Between Amplification and Absorption in Diffusive Random Lasers" SPIE Proceedings: Complex Mediums VI: Light and Complexity Vol. 5924 (2005)
Available at: http://works.bepress.com/alexey-yamilov/12/