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Proceedings Paper

Near-infrared optical gain and stimulated emission in organic-compound-doped polymer waveguides
Author(s): Takeyuki Kobayashi; Jean-Baptiste Savatier; Grace Jordan; Werner J. Blau; Yasuhiro Suzuki; Toshikuni Kaino
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Paper Abstract

We have successfully incorporated a near-infrared-emitting compound, 2-(6-(4-Dimethylaminophenyl)-2,4-neopentylene-1,3,5-hexatrienyl)-3-methyl-benzothiazolium Perchlorat, into poly(1-vinyl-2-pyrrolidone)-base planar waveguides. The variable-stripe-length method is employed to deduce the net gain coefficient of the waveguides, 1 cm in length, doped with 0.5 wt.% of the compound. The gain spectroscopy has revealed a moderate net modal gain of 2.6 cm-1 at 820 nm for the pump fluence of 22.6 μJ/cm2 (3.8 kW/cm2). The waveguides have exhibited lasing at 820 nm when they are transversely photoexcited at 532 nm with a nanosecond Nd: YAG laser. The Fresnel reflection at the polymer-air interfaces acts as a low-finesse Fabry-Perot cavity. The threshold for lasing has been found to be 24.5 μJ/cm2 (4.1 kW/cm2).

Paper Details

Date Published: 18 June 2004
PDF: 7 pages
Proc. SPIE 5351, Organic Photonic Materials and Devices VI, (18 June 2004); doi: 10.1117/12.532907
Show Author Affiliations
Takeyuki Kobayashi, Trinity College Dublin (Ireland)
Jean-Baptiste Savatier, Trinity College Dublin (Ireland)
Grace Jordan, Trinity College Dublin (Ireland)
Werner J. Blau, Trinity College Dublin (Ireland)
Yasuhiro Suzuki, Tohoku Univ. (Japan)
Toshikuni Kaino, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 5351:
Organic Photonic Materials and Devices VI
James G. Grote; Toshikuni Kaino, Editor(s)

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