WAVEGUIDE
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United States of America Patent
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app pub date -
Jul 31, 2015
filing date -
Aug 4, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A waveguide 10 includes first core portions (cores 210) extending in a first direction (an x-axis direction), at least one second core portion (dummy cores 220) which is provided parallel to the first core portions (the cores 210) and extends in the first direction (the x-axis direction), and clad portions 230 that separate the first core portions (the cores 210) and the second core portions (the dummy cores 220), and the second core portion (the dummy core 220) has first regions (wave guide regions 240) having a substantially constant cross-sectional area and second regions (first light-shielding regions 252 and second light-shielding regions 254) which are continuously provided from at least one end of the first region (the wave guide region 240) and has a cross-sectional area that decreases as the second region runs farther away from the first region (the wave guide region 240). Therefore, the transmission of optical signals in the second core portions (the dummy cores) is prevented.
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