Fast wavelength-selective switch elements and switch matrices
US6904189B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2002 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | May 15, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/07
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Ultra fast, compact wavelength-selective 2×2 optical switches based on polarization splitters and preferably electro-optical polarization converters, and switch matrices based on such switches. The switches and switch matrices are preferably implemented on electro-optical substrates using planar light-wave circuit technology. Switch designs include switches comprised of two polarization splitters and two polarization converters, and a switch comprised of one polarization splitter and two polarization converters. In a preferred embodiment, a switch comprises a TE-barring polarization splitter, a TM-barring polarization splitter, and two electro-optical wavelength-selective polarization converters connected in parallel between the TE- and TM-barring polarization splitters, and is implemented on an electro-optical substrate such as InP, GaAs, LiNbO3 or LiTaO3 using planar lightwave circuit technology. A preferred embodiment of a switch matrix for connecting i optical inputs to i monitoring outputs and to j optical outputs comprises a plurality of i×j wavelength-selective 2×2 optical switches arranged in i rows and j columns, each optical switch including a TE-barring polarization spli…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.