Wavelength selective modulator
US6295397A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2000 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Feb 18, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/217
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a device and to a method for modulating optical wavelength channels. The optical wavelength channels are switched to at least one access waveguide arranged on a first side of a first multimode waveguide (10). The wavelength channels are then transmitted through the multimode waveguide (10) and imaged on at least two connecting waveguides provided on an opposite side. The optical wavelength channels are then transmitted through the connecting waveguides. For each wavelength selective cross-switch structure (2, 4, 6, 8), the phase of a reflected wavelength is changed by two phase control elements (C1, C2, D1, D2, E1, E2, F1, F2) arranged in a first and a second connecting waveguide on a first side of said wavelength selective cross-switch structure (2, 4, 6, 8) over a given time period and slightly time shifted in relation to the second phase control element, at the same time as the phase of the reflecting wavelength remains relatively unchanged on a second side of said wavelength selective cross-switch structure (2, 4, 6, 8). For each wavelength selective cross-switch structure (2, 4, 6, 8), the phase of transmitting wavelengths is changed once in a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.