Optical data transmission device with parallel channel paths for arrayed optical elements
US5221984A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1990 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Sep 14, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3025
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A parallel optical data transmission device has an optical signal emitting unit, an optical signal reception unit and a parallel optical signal transmission cable for optically coupling therebetween. The optical signal emitting unit has an array of semiconductor lasers, whereas the reception unit has an array of semiconductor photodetectors of the same number. The transmission cable essentially consists of optical fibers bundled together. In the optical signal emitting unit, electrical drive signal transfer lines for the lasers have a stair-step bending pattern such that their transmission lengths sequentially vary. In the optical reception unit, electrical signal transmission lines for the photodetectors likewise has a stair-step bending pattern such that their transmission lengths sequentially differ, this stair-step pattern is like a reversed version of the stair-step pattern in the optical signal emitting unit, whereby the total lengths of electrical signal transmission line paths are made equal to one another for the respective transmission channels, thus ensuring compensation for a delay in parallel signal transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.