Methods and apparatus for optical pulse generator with progressive phase shift
US7027669B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2003 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | Mar 16, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/25
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Systems and techniques for generating optical pulses exhibiting a progressive phase shift, and the use of those pulses to transmit data, are described. One embodiment of the invention employs a Mach-Zehnder modulator using electrical signals chosen to introduce a predetermined frequency shift at the center of each pulse generated by the pulse generator. This frequency shift is achieved by introducing a timing difference between the electrical input signals. Another embodiment of the invention employs a chirp free pulse generator and a separate phase modulator to induce the desired frequency or phase shift. These progressively phase shifted pulses may be further modulated to transmit data by introducing phase or amplitude modulation on the optical pulses, depending on the data to be transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.