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Proceedings Paper

Pulse shortening utilizing acceptor dye as saturable absorber in energy transfer distributed feedback dye laser
Author(s): P. K. Palanisamy; M. Basheer Ahamed
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Paper Abstract

In this paper, a simple method of pulse narrowing by double Q-switching is presented. In energy transfer distributed feedback dye laser (ETDFDL) when acceptor dye acts as a saturable absorber, pulse narrowing is observed in both donor and acceptor emission regions. In prism-dye cell configuration using second harmonic of Nd-YAG laser as pump source, the ETDFDL output is obtained from dyes Rhodamine 6G (R6G) as donor and Acid Blue 7 (Ab7)/Thionine (Th) as acceptors. In Rhodamine 6G and Acid Blue 7 combination pulse narrowing is observed only in the acceptor region whereas in the other combination namely Rhodamine 6G and Thionine, it is observed in both donor and acceptor regions. This is because of good overlap of the emission spectra of donor with the absorption spectra of acceptor. The detailed study is presented in this paper.

Paper Details

Date Published: 21 January 2006
PDF: 7 pages
Proc. SPIE 6108, Commercial and Biomedical Applications of Ultrafast Lasers VI, 61080X (21 January 2006); doi: 10.1117/12.645238
Show Author Affiliations
P. K. Palanisamy, Anna Univ. (India)
M. Basheer Ahamed, Crescent Engineering College (India)


Published in SPIE Proceedings Vol. 6108:
Commercial and Biomedical Applications of Ultrafast Lasers VI
Joseph Neev; Stefan Nolte; Alexander Heisterkamp; Christopher B. Schaffer, Editor(s)

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