Arrayed waveguide grating
US7058262B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Oct 3, 2001 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Mar 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/12016
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An arrayed waveguide grating (AWG) device is described in which there are a plurality of output waveguides (10) coupled at one end to the output side of an second optical interaction region (4) of the AWG, and wherein the output waveguides are substantially identically curved in at least a portion of the fan-out region of the AWG. This improves the channel (frequency) spacing accuracy of the AWG. In one embodiment input waveguides (2) of the AWG are also substantially identically curved in at least a portion of the fan-in region of the AWG, these being inversely curved to the substantially identically curved portions of the output waveguides, with respect to the direction of travel of light along the waveguides. This has been found to reduce asymmetry in the channel output response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.