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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 11 — Apr. 10, 2008
  • pp: 1913–1921

Side illumination fluorescence emission characteristics from a dye doped polymer optical fiber under two-photon excitation

M. Sheeba, M. Rajesh, S. Mathew, V. P. N. Nampoori, C. P. G. Vallabhan, and P. Radhakrishnan  »View Author Affiliations


Applied Optics, Vol. 47, Issue 11, pp. 1913-1921 (2008)
http://dx.doi.org/10.1364/AO.47.001913


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Abstract

Two-photon excited (TPE) side illumination fluorescence studies in a Rh6G–RhB dye mixture doped polymer optical fiber (POF) and the effect of energy transfer on the attenuation coefficient is reported. The dye doped POF is pumped sideways using 800 nm , 70 fs laser pulses from a Ti:sapphire laser, and the TPE fluorescence emission is collected from the end of the fiber for different propagation distances. The fluorescence intensity of RhB doped POF is enhanced in the presence of Rh6G as a result of energy transfer from Rh6G to RhB. Because of the reabsorption and reemission process in dye molecules, an effective energy transfer is observed from the shorter wavelength part of the fluorescence spectrum to the longer wavelength part as the propagation distance is increased in dye doped POF. An energy transfer coefficient is found to be higher at shorter propagation distances compared to longer distances. A TPE fluorescence signal is used to characterize the optical attenuation coefficient in dye doped POF. The attenuation coefficient decreases at longer propagation distances due to the reabsorption and reemission process taking place within the dye doped fiber as the propagation distance is increased.

© 2008 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2400) Fiber optics and optical communications : Fiber properties
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(060.7140) Fiber optics and optical communications : Ultrafast processes in fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 3, 2007
Revised Manuscript: February 8, 2008
Manuscript Accepted: February 13, 2008
Published: April 7, 2008

Citation
M. Sheeba, M. Rajesh, S. Mathew, V. P. N. Nampoori, C. P. G. Vallabhan, and P. Radhakrishnan, "Side illumination fluorescence emission characteristics from a dye doped polymer optical fiber under two-photon excitation," Appl. Opt. 47, 1913-1921 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-11-1913

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