Driving laser diodes with immunity to temperature changes, aging, and other effects
US7724792B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2006 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Mar 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/06832
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Various systems and methods are provided to achieve laser power control. In one embodiment, a system is provided that comprises a counter that holds a digital value. An digital-to-analog converter is employed to convert the digital value to an analog current. A data threshold current is generated by a laser driver based upon the analog current. The data threshold current is employed to represent a data value in a data signal employed to drive a laser diode. Also, circuitry is employed to adjust the digital value based upon a comparison between a target threshold current and a feedback current generated from a laser output of the laser diode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.