Source of femtosecond laser pulses
US8731008B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2008 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Dec 19, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2302/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A source of femtosecond laser pulses (50) comprising a 980 nm picosecond seed pulse source (12), a Ytterbium (Yb) doped fiber amplifier (14) operating in the three-level regime, a passive air-clad fiber (52) and a pulse compressor (16). The seed pulses are spectrally broadened due to self phase modulation (SPM) in the air-clad Yb doped fiber (18) and further broadened due to SPM in the passive core of the passive air-clad fiber (52), to produce sufficient spectral broadening to allow the pulses to be compressed in the dispersion compensator (16) into femtosecond pulses. The Yb doped fiber may have a phosphosilicate host composition in order to mitigate photodarkening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.