Optical Coupling between VCSEL and Optical Fiber with 45-degree Micro Mirror

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  • OYAMA Yusuke
    School of Information Technology and Electronics, Tokai University
  • MURATA Yoshikazu
    School of Information Technology and Electronics, Tokai University
  • WATANABE Noritoshi
    School of Information Technology and Electronics, Tokai University
  • MIKAMI Osamu
    School of Information Technology and Electronics, Tokai University
  • ICHIMURA Akira
    Electronic System Integration Technolgy Research Department Musashino Research Center, ASET
  • HIRAMATSU Seiki
    Electronic System Integration Technolgy Research Department Musashino Research Center, ASET

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Other Title
  • 面発光レーザと４５度ミラー付きファイバとの光結合
  • メン ハッコウ レーザ ト 45ド ミラー ツキ ファイバ ト ノ ヒカリ ケツゴウ

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As one of key technologies for the board level optical interconnection including both board-toboard and chip-to-chip, we have studied on“90-degree optical path change” using optical fibers with a 45-degree micro mirror. Ray trace simulation and optical coupling experiments between a vertical cavity surface emitting laser (VCSEL) and an optical fiber with a 45-degree micro mirror were performed. Coupling efficiency of -1.40 dB and the alignment tolerance of -20/+16 μm for the fiber with -1 dB down were obtained experimentally. The ray trace simulation suggested that the lens effect of the fiber outer shape improved the alignment tolerance of ±4 μm in comparison with a waveguide having a rectangular cross-section.

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