Patent ID: 11906778
Assignee: APPLE INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical splitter, comprising:
an input waveguide configured to input a wavelength range of light to a free propagation region, the input waveguide configured to achieve a proportional relationship between mode size and wavelength across the wavelength range of light at an input edge of the free propagation region;
the free propagation region having the input edge and an output edge, optically coupled to the input waveguide on the input edge, and configured to receive the wavelength range of light from the input waveguide, thereby generating a phase front of light; and
an array of output waveguides optically coupled to the output edge of the free propagation region, wherein:
each waveguide of the array of output waveguides is positioned at a predetermined angle to a local phase front of light of the phase front of light received by each waveguide from the free propagation region; and
the array of output waveguides comprises:
a center channel waveguide having a first width;
a first pair of adjacent outer channel waveguides each having a narrower width than the first width, wherein the first pair of adjacent outer channel waveguides is positioned to receive a summed optical power that is approximately the same as an optical power received by the center channel waveguide.