Method and apparatus for optical broadband frequency chirp
US7391550B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2004 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Nov 30, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0064
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Techniques for producing an optical broadband frequency sweep or chirp, include generating a narrowband frequency chirp and a frequency-shifted replica. The narrowband chirp has an optical carrier frequency, a pulse duration and a pulse bandwidth. A frequency-shifted replica is generated by frequency shifting the narrowband chirp by a frequency shift. Adding the frequency-shifted replica after a start of the narrowband chirp by a delay generates a broadband frequency chirp. Alternatively, the frequency-shifted replica is generated by frequency shifting a constant frequency pulse, and modulating the frequency-shifted pulse to generate narrowband chirps that are added to form the broadband chirp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.