Patent ID: 6735363
Filing Date: 2004-05-11
Classification: G02B

Abstract:
An optical apparatus, comprising:one or more slab waveguides; and two or more output waveguides each having a first end optically coupled to the slab waveguide, where the first ends of the output waveguides coupled to the slab waveguide are of various widths and at least two of the widths are different, where the widths of the output waveguides are selected such that transfer functions, each associated with a particular output waveguide, are substantially uniform with respect to a figure of merit, wherein a difference in width between the first ends of two adjacent output waveguides has a value that is within a factor of about ten of a value determined from the equation: &dd;w&dd;q=2&it;w12+w2wv&it;&dd;v&dd;qwherein q is an integer identifying a particular output waveguide, w is the width of the first end of the output waveguide, and &ngr; is a central frequency of a passband for the particular output waveguide.