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Proceedings Paper

Polymer optical waveguide composed of europium-aluminum-acrylate composite core for compact optical amplifier and laser
Author(s): Marina Mitani; Kenichi Yamashita; Toshimi Fukui; Takaaki Ishigure
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Paper Abstract

We successfully fabricate polymer waveguides with Europium-Aluminum (Eu-Al) polymer composite core using the Mosquito method that utilizes a microdispenser for realizing a compact waveguide optical amplifiers and lasers. Rareearth (RE) ions are widely used as the gain medium for fiber lasers and optical fiber amplifiers. However, high concentration doping of rare-earth-ion leads to the concentration quenching resulting in observing less gain in optical amplification. For addressing the concentration quenching problem, a rare-earth metal (RE-M) polymer composite has been proposed by KRI, Inc. to be a waveguide core material. Actually, 10-wt% RE doping into organic polymer materials was already achieved. Hence, realization of compact and high-efficiency waveguide amplifiers and lasers have been anticipated using the RE-M polymer composite. In this paper, a microdispenser is adopted to fabricate a Eu-doped polymer waveguide. Then, it is experimentally confirmed that the low-loss waveguides are fabricated with a high reproducibility. Optical gain is estimated by measuring the amplified spontaneous emission using the variable stripe length method. The fabricated waveguide exhibits an optical gain as high as 7.1 dB/cm at 616-nm wavelength.

Paper Details

Date Published: 27 February 2015
PDF: 7 pages
Proc. SPIE 9365, Integrated Optics: Devices, Materials, and Technologies XIX, 93650Q (27 February 2015); doi: 10.1117/12.2078694
Show Author Affiliations
Marina Mitani, Keio Univ. (Japan)
Kenichi Yamashita, Kyoto Institute of Technology (Japan)
Toshimi Fukui, KRI, Inc. (Japan)
Takaaki Ishigure, Keio Univ. (Japan)

Published in SPIE Proceedings Vol. 9365:
Integrated Optics: Devices, Materials, and Technologies XIX
Jean-Emmanuel Broquin; Gualtiero Nunzi Conti, Editor(s)

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