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Title: Experimental observation of disorder induced self-focusing in optical fibers

We observed disorder induced focusing nonlinearity activated by a monochromatic light beam in optical fibers composed by two kinds of plastics. The two materials, arranged in disordered fashion, support modes with a degree of localization which increases with the intensity of the optical beam. The temporal response of the optical fiber demonstrates the thermal origin of this nonlinearity. Measurements of the localization length as a function of the input power with broadband and monochromatic inputs show the effectiveness of focusing action with respect to the case of homogeneous fibers.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena, 291 00161 Roma (Italy)
  2. Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093 (United States)
  3. Department of Physics and Astronomy and Center for High Technology Materials, University of New Mexico, Albuquerque, New Mexico 87131 (United States)
  4. ISC-CNR and Department of Physics, University Sapienza, P.le Aldo Moro 5, I-00185, Roma (Italy)
Publication Date:
OSTI Identifier:
22310637
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BEAMS; FOCUSING; MONOCHROMATIC RADIATION; NONLINEAR PROBLEMS; OPTICAL FIBERS; PLASTICS; VISIBLE RADIATION