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Akira Himeno
Researcher at Nippon Telegraph and Telephone
Publications - 156
Citations - 2866
Akira Himeno is an academic researcher from Nippon Telegraph and Telephone. The author has contributed to research in topics: Optical switch & Waveguide (optics). The author has an hindex of 28, co-authored 156 publications receiving 2808 citations.
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Journal ArticleDOI
Very low insertion loss arrayed-waveguide grating with vertically tapered waveguides
TL;DR: In this article, a very low insertion loss silica-based arrayed-waveguide grating (AWG) achieved using a novel structure, which has vertically tapered waveguides between arrays to reduce the slab-to-arrayed waveguide transition loss.
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Phase-noise and shot-noise limited operations of low coherence optical time domain reflectometry
TL;DR: In this article, it was shown theoretically and experimentally that Fresnel end reflection of the waveguide under test degrades the sensitivity of low coherence optical time domain reflectometry (OTDR).
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16-channel optical add/drop multiplexer consisting of arrayed-waveguide gratings and double-gate switches
TL;DR: In this article, an optical add/drop multiplexer that enables full access to 16 individual wavelength channels has been fabricated on the planar lightwave circuit (PLC), which consists of four arrayed-waveguide gratings which are connected through 16 double-gate thermo-optic switches.
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Low loss and high extinction ratio strictly nonblocking 16/spl times/16 thermooptic matrix switch on 6-in wafer using silica-based planar lightwave circuit technology
TL;DR: In this article, a silica-based 16/spl times/16 strictly nonblocking thermooptic matrix switch with a low loss and a high extinction ratio was described, which employs a double Mach-Zehnder interferometer (MZI) switching unit and a matrix arrangement to reduce the total waveguide length.
Journal ArticleDOI
Low-loss and high-extinction-ratio silica-based strictly nonblocking 16/spl times/16 thermooptic matrix switch
TL;DR: In this article, a low-loss and high-extinction-ratio silica-based 16/spl times/16 thermooptic matrix switch is demonstrated, which employs a double Mach-Zehnder interferometer switching unit and a matrix arrangement which reduces the total waveguide length.