Waveguide array with improved efficiency for wavelength routers

Details Waveguide array with improved efficiency for wavelength routers Waveguide array with improved efficiency for wavelength routers

1998-06-30

2000-05-02

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Particular coupling structure

385 15, 385 20, 385 21, G02B 626

Patent

active

060582332

ABSTRACT:
An optical interconnection apparatus including waveguide arrays, such as grating routers and star couplers, has reduced coupling loss by reducing the width of the waveguides in the array, where they connect to the free-space region, so that they are smaller than the gaps between adjacent waveguides. The free-space region is formed by a slab whose thickness is tapered in a transition region, where it connects to the waveguide arrays, so as to essentially eliminate any mismatch loss that would otherwise be caused in an abrupt junction of the waveguide arrays with the free-space region.

REFERENCES:
patent: 5136671 (1992-08-01), Dragone
patent: 5822481 (1998-10-01), Mestric

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