Low-cost fast variable optical attenuator for optical wavelength tracking
US8634691B2 · kind B2 · utility
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3References
19Claims
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Key dates
| Filing date | Sep 13, 2012 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Sep 13, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/3596
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Variable optical attenuator (VOA) formed by disposing upon a substrate a waveguide, a p-type region and an n-type region about the waveguide, and an epi-silicon region disposed upon the waveguide, the VOA responsive to a bias current to controllably inject carriers into the waveguide to attenuate thereby optical signal propagating through the waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.