期刊
OPTICS LETTERS
卷 40, 期 9, 页码 2068-2071出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.40.002068
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资金
- Russian Foundation for Basic Research [13-02-01465, 14-29-07182, 14-02-00784, 14-22-02099]
- Welch Foundation [A-1801]
- Russian Science Foundation [14-12-00772]
- Russian Science Foundation [14-12-00772] Funding Source: Russian Science Foundation
A high-energy supercontinuum spanning 4.7 octaves, from 250 to 6500 nm, is generated using a 0.3-TW, 3.9-mu m output of a mid-infrared optical parametric chirped-pulse amplifier as a driver inducing a laser filament in the air. The high-frequency wing of the supercontinuum spectrum is enhanced by odd-order optical harmonics of the mid-infrared driver. Optical harmonics up to the 15th order are observed in supercontinuum spectra as overlapping, yet well-resolved peaks broadened, as verified by numerical modeling, due to spatially nonuniform ionization-induced blue shift. (C) 2015 Optical Society of America
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