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Proceedings Paper

Preferential input and output coupling of oval-shaped optical microcavities: fluorescence emission from oval-shaped dye-doped glass fibers
Author(s): Andrew W. Poon; Steven L. Kan; Paul A. Tick; Daniel A. Nolan; Richard K. Chang
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Paper Abstract

We report an experimental study of the preferential input and output side coupling of oval-shaped optical microcavities. The cavity was in the cross-section of an oval-shaped dye-doped glass fiber, which was optically pumped perpendicular to the fiber axis. Fluorescent emission perpendicular to the fiber axis was imaged with a lens onto a CCD camera. The integrated intensity of the image profile at different angles provided the far-field angular pattern of the fluorescent emission peaked at ~ 45 degree(s) relative to the cavity major axis. The near-field spatial profiles revealed refractive output coupling from an extended high- curvature region. A simple ray-path model was used to calculate the fluorescent near-field spatial profile. Preferential input side coupling was also observed in the direction ~45 degree(s) relative to the cavity major axis. By focusing the pump beam at the high-curvature region in the preferred coupling direction, we observed ~ a factor of 8 enhancement in the integrated intensity at the preferred fluorescence output angle. By imaging the fiber top surface, we demonstrated that the preferentially input coupled light could be guided along the cavity circumference.

Paper Details

Date Published: 11 July 2000
PDF: 9 pages
Proc. SPIE 4078, Optoelectronic Materials and Devices II, (11 July 2000); doi: 10.1117/12.392149
Show Author Affiliations
Andrew W. Poon, Yale Univ. (Hong Kong)
Steven L. Kan, Yale Univ. (United States)
Paul A. Tick, Corning Inc. (United States)
Daniel A. Nolan, Corning Inc. (United States)
Richard K. Chang, Yale Univ. (United States)


Published in SPIE Proceedings Vol. 4078:
Optoelectronic Materials and Devices II
Yan-Kuin Su; Pallab Bhattacharya, Editor(s)

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