Lightwave transmission system using selected optical modes
US5416862A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Apr 7, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/262
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The capacity of a multi-mode optical fiber system, such as a local area network, is increased by selectively propagating only higher-order modes through the multi-mode fiber. Because only a small number of higher-order modes are propagated, pulse spreading induced by modal dispersion is minimized, and the bandwidth of the multi-mode fiber is increased. Because of the reduced modal dispersion, higher-order modes are recovered from the multi-mode fiber in accordance with the invention without filtering the output of the fiber. This renders the system less vulnerable to mechanical perturbations that are known to reduce the bit error rate of systems requiring filtering. Thus, by propagating only higher-order modes in this manner, the "bandwidth-distance" product of the multi-mode fiber is significantly increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.