Filter response optimization for an arrayed waveguide grating device by adjusting grating optical path length at nanometer scale
US7194162B2 · kind B2 · utility
2Cited by
20References
20Claims
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Key dates
| Filing date | Feb 22, 2002 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Sep 17, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/12033
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of optimizing a filter response of an arrayed waveguide grating is disclosed. The method includes the step of measuring a respective phase error of a plurality of waveguide cores of the arrayed waveguide grating. Once the phase error is measured, a respective optical path length of the cores is adjusted in accordance with the respective phase error of the cores. Optical path length is adjusted by adjusting a respective refractive index of the cores. The respective optical path length can be controlled to nanometer accuracies by adjusting the respective refractive index of the cores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.