Fundamental Study of Parallel Moduling Scheme Based on a Micro-Optical Bench and Collimating Planar Microlenses.

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  • Aoki Yasuhiko
    Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
  • Mizuno Rogerio Jun
    Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
  • Shimada Yuji
    Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
  • Iga Kenichi
    Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

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We have conducted a feasibility study of a parallel moduling scheme based on a collimating guide using planar microlenses. This optical subsystem consists of a stacked planar optical circuit and a micro-optical bench (MOB) for alignment. We measured the coupling loss of microlens collimation and determined that single-mode fiber-to-fiber coupling of approximately 2 dB is possible. We also investigated the optical crosstalk of the collimating optical system using planar microlenses (PMLs), and the crosstalk of less than -70 dB was achieved. As an initial subsystem experiment using vertical cavity surface emitting lasers (VCSELs), we fabricated a VCSEL array (λ=850 nm, Ith=1.8 mA at room temperature, CW) and bonded it on a Si MOB.

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