Sliding-frequency guiding filter for soliton transmission
US5974208A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1997 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Aug 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/25077
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a sliding-frequency guiding filter which is capable of guiding soliton pulses to hundreds of different resonant frequencies by designing the device so that the filter can automatically offset its peak resonant frequency from the frequency of incoming soliton pulses. The sliding-frequency guiding filter comprises the followings: a coupler to tap some of incoming soliton signals; a wafer whose one half is coated by multilayered dielectric on both sides while leaving the other half uncoated, where the soliton signals tapped through the coupler is directed to coated half and uncoated half of the wafer, respectively; and, a thermoelectric cooler attached to the coated side of the wafer. The sliding-frequency guiding filter, made of the same design, can be applied throughout the soliton transmission line instead of the numerous filters all operating at different resonant frequencies. Accordingly, the sliding-frequency guiding filter can be practically used in ultralong distance soliton transmission system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.