Method and system for removal of low order optical transmission modes in multimode optical fiber computer network to improve modal bandwidth
US6154589A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1998 |
| Grant date | Nov 28, 2000 |
| Priority date | — |
| Expiry date | May 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2581
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for improving modal bandwidth in computer networks using multimode optical fiber and single mode sources is disclosed in which the optical signal from a center of the optical fiber is blocked from reaching detector. This is accomplished according to a number of different techniques including the use of opaque spots on the fiber media/fiber couplers or the use of dark-cored fiber couplers. These configurations prevent pulse splitting that occurs in single mode source/multimode fiber systems by preventing light from the multimode fiber's center from interfering with the detector. When this is achieved, the detector is insulated from the effects of any pulse splitting, supporting data rates of greater than one GBPS by increasing the modal bandwidth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.