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SSC chip, fiber array attached with SSC, PLC module attached with SSC and method for manufacturing SSC

  • US 8,538,213 B2
  • Filed: 11/25/2009
  • Issued: 09/17/2013
  • Est. Priority Date: 11/26/2008
  • Status: Active Grant
First Claim
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1. A spot-size converter (SSC) chip having one or a plurality of spot-size converters, each said spot-size converter being a light waveguide composed of a clad and a core, comprising, in an order formed:

  • a straight waveguide whose core width and core height are constant;

    a horizontally tapered waveguide whose core width is enlarged in a tapered shape in the horizontal direction from the core width of the straight waveguide;

    a vertically tapered waveguide whose core height is enlarged in a tapered shape in the vertical direction from the core height of the straight waveguide; and

    a spot-size enlarged portion whose core height and core width are both enlarged, whereinsaid clad and core are made of a silica material, andsaid core has a uniform refraction index and square or rectangular cross sections of respective parts of said core.

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