Methods and apparatuses for direct digital drive of a laser in a passive optical network
US6834065B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2002 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Jul 9, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/06835
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus for digitally driving a laser in a passive optical network includes a programmable current source having an output terminal connected to supply current to the laser. The programmable current source includes a plurality of output pins, each of the outputs pins has a voltage thereon, all of the output pins are connected to the output terminal, and one or more of the output pins is connected to the output terminal through a resistor. A controller supplies a digital control signal to the programmable current source to specify which of the output pins are to be turned on, to thereby determine the magnitude of a current supplied to the laser from the output terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.