Laser power supply and control device for a fiber optic link between a subscriber and a telecommunications central office
US5050239A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Mar 21, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/504
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A laser power supply and control device for a fiber optic link between a subscriber and a telecommunications central office provides selection of one of two data sources and varies the laser current. The device includes a current generator controlled by an activation signal and delivers a laser current to a laser that can be varied. A selector circuit is connected to the two data sources. An output modulator has an input connected to the current generator which delivers the laser current thereto and to the selector circuit which delivers the transmit data. Its output is connected to the laser to which it delivers the laser current modulated by the transmit data. In the absence of data to transmit the value of the activation signal, the current generator is disabled so that the laser is not energized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.