Jitter suppression techniques for laser driver circuits
US6760353B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 2002 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Jul 30, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0683
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Driver circuits of the present invention provide current to drive laser diodes. The output current of the driver circuit includes a data signal and a low frequency tone signal. The low frequency tone signal is within the bandwidth of a power control feedback loop. The tone signal introduces low frequency noise into the output signal of the driver circuit. The low frequency noise causes jitter at the zero crossing points of the driver circuit output signal. A laser driver circuit of the present invention provides a compensation current to a laser diode. The compensation current is out of phase with the tone signal. The compensation current eliminates the low frequency noise in the output signal of the laser driver circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.