Polymer optical waveguide composed of europium-aluminum-acrylate composite core for compact optical amplifier and laser

Marina Mitani, Kenichi Yamashita, Toshimi Fukui, Takaaki Ishigure

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


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.

Original languageEnglish
Title of host publicationIntegrated Optics
Subtitle of host publicationDevices, Materials, and Technologies XIX
EditorsJean-Emmanuel Broquin, Gualtiero Nunzi Conti
ISBN (Electronic)9781628414554
Publication statusPublished - 2015
EventIntegrated Optics: Devices, Materials, and Technologies XIX - San Francisco, United States
Duration: 2015 Feb 92015 Feb 11

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherIntegrated Optics: Devices, Materials, and Technologies XIX
Country/TerritoryUnited States
CitySan Francisco


  • amplifier
  • circular-core polymer waveguide
  • laser
  • rare-earth-metal polymer composite
  • the Mosquito method

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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