| Literature DB >> 19498577 |
Abstract
We report a simple experiment to directly determine the critical power for self-focusing in air by measuring the focal shift of the focused femtosecond Ti:sapphire laser pulses. The measured critical power is 10 GW for the 42 fs laser pulse; it gradually decreases to 5 GW for (chirped) pulse duration longer than 200 fs.Year: 2005 PMID: 19498577 DOI: 10.1364/opex.13.005750
Source DB: PubMed Journal: Opt Express ISSN: 1094-4087 Impact factor: 3.894