Optical arrayed waveguide grating devices
US6374013B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Dec 23, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/12033
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
It is found that the use of a multimode interference (MMI) section to flatten the pass-bands of an arrayed waveguide grating (AWG) multiplexer/demultiplexer or comb filter device introduces undesirable wavelength dispersion into those pass-bands if that MMI section mixes modes of more than two different orders, and if the grating of that device is a ‘uniform’ grating whose waveguides are equally (minimally) attenuating, and in which the optical path length difference between each adjacent pair of waveguides 40 of the array is the same. This dispersion can be substantially compensated by appropriate ‘tailoring’ of the grating to remove such uniformity
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.