Polymer Waveguide Optical Amplifier Using Organic/Inorganic Nanocomposites Doped With Rare-Earth-Metal Nanoclusters

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  • Mataki Hiroshi
    Photofunctional Materials Laboratory, KRI Inc.
  • Tsuchii Kaname
    Photofunctional Materials Laboratory, KRI Inc.
  • Mibuka Nobuko
    Photofunctional Materials Laboratory, KRI Inc.
  • Suzuki Ayami
    Photofunctional Materials Laboratory, KRI Inc.
  • Sun Jun
    Photofunctional Materials Laboratory, KRI Inc.
  • Taniguchi Hironori
    Department of Electronics, Graduate School of Science and Technology, Kyoto Institute of Technology
  • Yamashita Kenichi
    Department of Electronics, Graduate School of Science and Technology, Kyoto Institute of Technology
  • Oe Kunishige
    Department of Electronics, Graduate School of Science and Technology, Kyoto Institute of Technology

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We fabricated planar polymer optical waveguides doped with Eu-Al nanoclusters, and successfully demonstrated their optical amplification at a wavelength of 614 nm under both pulsed operation using a N2laser (λ=337 nm) and CW operation using a frequency-doubled diode-pumped solid-state laser (λ=532 nm). The optical gain was found to be as high as 5.57 dB/mm, which, to the best of our knowledge, is the highest one obtained in rare-earth-doped planar optical waveguides. Further, it was confirmed that the concentration quenching is well suppressed in the Eu-Al/PMMA planar waveguide.

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