Journal article
Identification of statistical regimes and crossovers in coherent random laser emission
Optics letters, Vol.37(4), pp.662-664
02/15/2012
DOI: 10.1364/OL.37.000662
PMID: 22344140
Abstract
We measure intensity statistics and identify statistical regimes and crossovers in random lasers based on nonresonant feedback. A single parameter extracted from an alpha-stable Levy fit is used to characterize the intensity distributions in all regimes. Measurements made over a range of scattering strengths, excitation energies, and sample sizes enable us to demarcate three regimes of intensity statistics and the corresponding crossovers. An initial subthreshold Gaussian regime abruptly transits into a Levy regime at the random lasing threshold, which is followed by a continuous gradual crossover toward a second Gaussian regime. We find that the prominence of the Levy regime depends upon the sample size. (C) 2012 Optical Society of America
Details
- Title: Subtitle
- Identification of statistical regimes and crossovers in coherent random laser emission
- Creators
- Ravitej Uppu - Tata Institute of Fundamental ResearchAnjani Kumar Tiwari - Tata Institute of Fundamental ResearchSushil Mujumdar - Tata Institute of Fundamental Research
- Resource Type
- Journal article
- Publication Details
- Optics letters, Vol.37(4), pp.662-664
- Publisher
- Optical Soc Amer
- DOI
- 10.1364/OL.37.000662
- PMID
- 22344140
- ISSN
- 0146-9592
- eISSN
- 1539-4794
- Number of pages
- 3
- Language
- English
- Date published
- 02/15/2012
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984442014702771
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