Bidirectional optical transmission system
US5608565A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1995 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Jun 13, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/272
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a bidirectional optical transmission system between an optical subscriber unit (10; OSU) in a central office and a plurality of optical network units (20A.sub.i ; ONU) in customer premises each coupled with the subscriber unit (10) through an optical fiber cable, the optical subscriber unit (10) has a laser oscillator (11), a device (12) for splitting an output beam of the laser oscillator into n number of beams, a plurality of optical modulators (13-1 through 13-n), coupled with each of the n number of beams, for modulating a related optical beam with a transmission signal S for a respective optical network unit, a plurality of optical detectors (14-1 through 14-n) coupled with each of the optical network units to provide a receive signal R by converting the receive optical signal into electrical form. Each pair of one of the optical modulators and one of the optical detectors are coupled with a respective optical network unit through an optical fiber cable (5-1, 5-2). Each of the optical network units (20-1 through 20-n) has a device for receiving the optical signal from the ONU, to convert the receive optical beam into the electrical signal and for transmitting the optical si…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.