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    • 20. 发明授权
    • Design of low insertion loss, single-mode polymeric waveguides
    • 低插入损耗单模聚合物波导的设计
    • US06487354B1
    • 2002-11-26
    • US09846699
    • 2001-05-01
    • Paul M. FermKevin BattellLawrence W. Shacklette
    • Paul M. FermKevin BattellLawrence W. Shacklette
    • G02B610
    • G02B6/1221G02B6/13G02B2006/12107
    • The invention provides organic optical waveguide devices which are lithographically formed and employ polymeric materials having low propagation loss. An optical waveguide has a substrate; a polymeric buffer layer on a surface of the substrate; a thin, polymeric undercladding layer on a surface of the buffer layer; a pattern of a light-transmissive, polymeric core on the surface of the undercladding layer; and a polymeric overcladding layer on a top surface of the core and on sidewalls of the core and on a portion of the undercladding layer; the undercladding layer having a thickness of from about 10 percent to about 50 percent a thickness of the core. The core has an index of refraction nc which is greater than an index of refraction of the overcladding layer no and also greater than an index of refraction of the undercladding layer nu; wherein &Dgr;n=nc−no, and wherein the difference between nc and the index of refraction of the buffer nb is at least about 1.5 times &Dgr;n.
    • 本发明提供了光刻形成的有机光波导器件,并且使用具有低传播损耗的聚合材料。 光波导具有基板; 在所述基底的表面上的聚合物缓冲层; 在缓冲层的表面上的薄的聚合物底层; 在下包层的表面上的透光聚合物芯的图案; 以及在所述芯的顶表面和所述芯的侧壁上和所述下包层的一部分上的聚合物外包层; 所述下包层具有芯的厚度的约10%至约50%的厚度。 芯的折射率nc大于外包层no的折射率,并且大于下包层nu的折射率; 其中DELTAn = nc-no,并且其中nc和缓冲器nb的折射率之间的差异是DELTAn的至少约1.5倍。