Patent ID: 7587138

Claim:
An optical device, comprising a crossover component comprising a first 2×2 splitter, the first 2×2 splitter comprising a first input port, a second input port, a first output port, and a second output port; a non-quadrature component comprises a second 2×2 splitter, the second 2×2 splitter comprising a first input port, a second input port, a first output port, and a second output port; a first optical waveguide having a first optical path length, a first end that is optically coupled to the first output port or first input port of the crossover component, and a second end that is optically coupled to the first input port or first output port of the non-quadrature component; and a second optical waveguide having a second optical path length that is different from the first optical path length, a first end that is optically coupled to the second output port or second input port of the crossover component, and a second end that is optically coupled to the second input port or the second output port of the non-quadrature component, the optical device having a power splitting tolerance of ±1-dB or less over an ultra-broad wavelength range of about 1.25μ to about 1.65μ.