Longitudinal versus transversal excitation in doped graded-index polymer optical fibers

M. A. Illarramendi, J. Arrue, I. Ayesta, F. Jiménez, J. Zubia, I. Bikandi, A. Tagaya, Y. Koike

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


In this work we perform a detailed experimental and theoretical analysis of the properties of amplified spontaneous emission (ASE) in a rhodamine-6G-doped graded-index polymer optical fiber when the fiber is pumped either longitudinally or transversally with respect to the fiber axis. The dependence of the ASE threshold and efficiency on fiber length has been compared for both schemes of excitation. A theoretical model for longitudinal excitation has been carried out by means of the laser rate equations as functions of time, distance traveled by light and wavelength. The analysis takes into account that the fiber is a typical graded-index POF in which the radial distributions of light power density and dye concentration are not uniform. The theoretical calculations agree satisfactorily with the experimental results. The photodegradation of the ASE intensity has also been measured for both pumping schemes.

Original languageEnglish
Title of host publicationOrganic Photonic Materials and Devices XVI
ISBN (Print)9780819498960
Publication statusPublished - 2014
EventOrganic Photonic Materials and Devices XVI - San Francisco, CA, United States
Duration: 2014 Feb 32014 Feb 5

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherOrganic Photonic Materials and Devices XVI
Country/TerritoryUnited States
CitySan Francisco, CA


  • Fiber amplifiers
  • Fiber lasers
  • Light emitting polymers
  • Polymer optical fibers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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