Athermal arrayed waveguide grating
AssigneeMACOM Technology Solutions Holdings, Inc.
InventorHiroyuki Yamazaki
Life of this patent
Estimating the term…
Abstract
Athermal arrayed waveguide grating structure that may operate as an optical filter including an input Silicon (Si) slab waveguide, an output Si slab waveguide, the input Si slab waveguide and the output Si slab waveguide optically connected by an arrayed group of Silicon Nitride (SiN) grating waveguides. Temperature insensitivity of the structure is achieved by locating output waveguide(s) of the Si output slab waveguide at/within a 10-degree angle offset from the center line of the output Si slab waveguide.
Claims12
An athermal arrayed waveguide grating structure comprising:
- an input free space coupler;
- an output free space coupler;
- and
- a waveguide array of M waveguides of unequal length optically connecting the input free space coupler to the output free space coupler, wherein each waveguide in the waveguide array extends from the input free space coupler to the output free space coupler;
- wherein the input and the output free space couplers are constructed from Silicon (Si) and the M waveguides of unequal length are constructed from Silicon Nitride (SiN).
A waveguide optical filter comprising;
- an input slab waveguide;
- an output slab waveguide;
- a waveguide array optically connecting the input slab waveguide to the output slab waveguide;
- CHARACTERIZED IN THAT:
- each waveguide in the waveguide array extends from the input slab waveguide to the output slab waveguide;
- and
- the input slab waveguide and the output slab waveguide are Si slab waveguides, and the waveguide array is a SiN waveguide array.
Dependencies are inferred from the claim text.