@inproceedings{a3b1b4b9ad574995949816fd4556c4a3,
title = "Femtosecond pulse collapse in a quadratic nonlinear medium",
abstract = "Two-dimensional multicolored transverse arrays were generated in a quadratic nonlinear medium under the pump of two crossly overlapped femtosecond beams based on the cascaded non-collinear quadratic nonlinear couplings between the input pulses and quadratic spatial solitary waves originated from spatial breakup of one of the input beams with a small asymmetry. A probing supercontinuum pulse was diffracted and amplified with phase preservation, resulting in the formation of up-converted multicolor two-dimensional transverse arrays. By seeding with weak second harmonic pulses, the two-dimensional multicolored transverse patterns could be suppressed through weak beam control of the induced quadratic spatial solitary waves. At a high-intensity pump, colored conical emissions could be observed as a result of spatiotemporal collapse of femtosecond pulses in a quadratic medium. Seeded amplification of colored conical emission was demonstrated to support ultrabroadband up-conversion with a widely tunable range in wavelength and significantly high energy conversion efficiency.",
keywords = "Colored conical emission, Femtosecond pulse collapse, Two-dimensional multicolored transverse arrays",
author = "Jian Wu and Han Xu and Kun Wu and Heping Zeng",
year = "2007",
doi = "10.1117/12.753251",
language = "英语",
isbn = "0819468916",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Int. Conf. on Lasers, Applic., and Technologies 2007",
note = "International Conference on Lasers, Applications, and Technologies 2007: Environmental Monitoring and Ecological Applications; Optical Sensors in Biological, Chemical, and Engineering Technologies; and Femtosecond Laser Pulse Filamentation ; Conference date: 28-05-2007 Through 01-06-2007",
}