Multi-output arrayed waveguide grating demultiplexer
US6597841B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 2002 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Jan 25, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/12033
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device for receiving an optical signal of one or more wavelengths comprises an n-way optical coupler, where n is any integer ≧2, to split the optical signal by an intensity ratio into n branch signals. The device also comprises an arrayed waveguide grating, which includes a first optical slab having n input ports, where each branch signal is coupled to a different input port and a waveguide array structure including a plurality of waveguides. The waveguides have incrementally different path lengths. The device further comprises a second optical slab coupled to each of the plurality of waveguides of the waveguide array structure. In the second optical slab, the n branch signals are each demultiplexed. With this configuration, the demultiplexed signals of each branch signal do not substantially overlap with the demultiplexed signals of another branch signal at an output face of the second optical slab.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.