Dual-mode laser diode transmitter
US5175641A · kind A · utility
21Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1991 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Apr 5, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/503
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A semiconductor injection laser diode is coupled via a switch to two drivers. One driver provides a drive current above the threshold current required to cause the injection laser diode to lase. The other driver provides a drive current below this threshold current, causing the laser diode to operate in a light-emitting diode (LED) mode. The switch couples the laser diode to one or the other of the drivers depending upon the receiver to which the transmitter is coupled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.