Blue extended super continuum light source
US7800818B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2006 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Mar 10, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/085
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a blue extended super continuum light source, when pulses of partly coherent monochromatic “pump” radiation of essentially constant amplitude are propagating through a microstructure fiber medium within a region of anomalous dispersion of the medium, then, provided the medium has a finite nonlinear coefficient of the index of refraction, the pump pulse is subject to a modulation instability. This results in formation of a train of narrow pulses with Tera Hertz repetition rate. Phase match between red shifted Raman solitons generated by the pump pulse and energy shed by the pump pulse at all frequencies with a group velocity below the pump pulse group velocity may lead to the formation of Cherenkov radiation. The solitons may seed Cherenkov radiation at different wavelengths depending on the actual fiber parameters. This allows extension of generated super continuum light beyond the four wave mixing limit when applying picosecond or nanosecond pump pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.