SSC chip, fiber array attached with SSC, PLC module attached with SSC and method for manufacturing SSC
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided a SSC chip whose yield may be improved and whose processing steps may be simplified as compare to those of a prior art PLC chip having a light waveguide circuit to which a spot-size converter (SSC) is added, a fiber array attached with the SSC chip, a PLC module attached with the SSC chip and a method for manufacturing the SSC chip. The SSC chip has four spot-size converters and is fabricated separately from a PLC chip. Each SSC has a straight waveguide having the same core width and height with an end of an input/output waveguide of the PLC chip, a horizontally tapered waveguide in which the core width is enlarged in a tapered shape in the horizontal direction from the core width of the straight waveguide, a vertically tapered waveguide in which the core height is enlarged in a tapered shape in the vertical direction from the core height of the horizontally tapered waveguide and a spot-size enlarged portion whose core width and core height are both enlarged. Because it is unnecessary to fabricate the SSC at the end of the input/output waveguide of the PLC chip, a yield of the PLC chip may be improved.
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Citations
16 Claims
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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:
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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, wherein said clad and core are made of a silica material, and said core has a uniform refraction index and square or rectangular cross sections of respective parts of said core. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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2. 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:
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a straight waveguide whose core width and core height are constant; 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; 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; and a spot-size enlarged portion whose core height and core width are both enlarged, wherein said clad and core are made of a silica material, and said core has a uniform refraction index and square or rectangular cross sections of respective parts of said core. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification