Reduction of MEMS mirror edge diffraction in a wavelength selective switch using servo-based multi-axes rotation
US7346234B2 · kind B2 · utility
27Cited by
46References
23Claims
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Key dates
| Filing date | Dec 22, 2005 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Mar 29, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/095
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Effects of diffraction of a spectral beam from an edge of the micromirrors are reduced in order to optimize the passband in a wavelength selective switch. The effects of diffraction on the pass band may be reduced by using rotation of the micromirror about both the attenuation axis and the switching axis to achieve the desired level of attenuation. Peak coupling can be attained by dithering the micromirror about an axis tangent to a contour of constant attenuation using simultaneous rotation about the switching and attenuation axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.