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LOW LOSS FUNNEL-TYPE PLC OPTICAL SPLITTER WITH INPUT CLADDING MODE ABSORPTION STRUCTURE AND/OR OUTPUT SEGMENTED TAPER STRUCTURE
LOW LOSS FUNNEL-TYPE PLC OPTICAL SPLITTER WITH INPUT CLADDING MODE ABSORPTION STRUCTURE AND/OR OUTPUT SEGMENTED TAPER STRUCTURE
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机译:具有输入包层模式吸收结构和/或输出分段锥结构的低损耗漏斗型PLC光学分路器
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摘要
A funnel-type planar lightwave circuit (PLC) optical splitter having an input optical waveguide, a slab waveguide receiving the input optical signal from the input optical waveguide, and output waveguides projecting from the slab region. The region connecting the slab waveguide to the output waveguides is characterized by a segmented taper structure. In another additional, or alternative aspect of the present invention, a cladding mode absorption region runs along either or both sides of the input optical waveguide. A funnel-type splitter with both a cladding mode absorption region and a segmented taper structure provides a "super" low loss splitter design, when considering both insertion loss and polarization dependent loss. Advantageously, the disclosed funnel-type PLC splitter does not require a quartz substrate due to its very low PDL, and a silicon substrate can be used. Silicon substrates are known to be lower cost, with a higher resistance to fracture.
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