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Optical Engineering

Characterization of rhodamine 6G doped polymer optical fiber by side illumination fluorescence
Author(s): Rajesh Mandamparambil Nair; K. Geetha; Sheeba M. Nambiar; C. P. Girija Vallabhan; P. Radhakrishnan; V. P. N. Nampoori
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Paper Abstract

The length-dependent tuning of the fluorescence spectra of a dye doped polymer fiber is reported. The fiber is pumped sideways and the fluorescence is measured from one of the ends. The excitation of a finite length of dye doped fiber is done by a diode pumped solid state laser at a wavelength of 532 nm. The fluorescence emission is measured at various positions of the fiber starting from a position closer to the pumping region and then progressing toward the other end of the fiber. We observe that the optical loss coefficients for shorter and longer distances of propagation through the dye doped fiber are different. At longer distances of propagation, a decrease in optical loss coefficient is observed. The fluorescence peaks exhibit a redshift of 12 nm from 589 to 610 nm as the point of illumination progresses toward the detector end. This is attributed to the self-absorption and re-emission of the laser dye in the fiber.

Paper Details

Date Published: 1 July 2006
PDF: 4 pages
Opt. Eng. 45(7) 075003 doi: 10.1117/1.2221553
Published in: Optical Engineering Volume 45, Issue 7
Show Author Affiliations
Rajesh Mandamparambil Nair, Cochin Univ. of Science & Technology (India)
K. Geetha, Cochin Univ. of Science & Technology (India)
Sheeba M. Nambiar, Cochin Univ. of Science & Technology (India)
C. P. Girija Vallabhan, Cochin Univ. of Science & Technology (India)
P. Radhakrishnan, Cochin Univ. of Science & Technology (India)
V. P. N. Nampoori, Cochin Univ. of Science & Technology (India)

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