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Pumping a quadratic nonlinear crystal in the mid-IR we observe octave-spanning mid-IR supercontinua. A self-acting cascaded process leads to the formation of a self-defocusing nonlinearity, allowing formation of filament-free octave-spanning supercontinua in the 2.0–7.0 μm range with 10s of μJ pulse energies, much higher than filament-based techniques. This allows to use the supercontinuum as ultra-broadband...
The third order optical nonlinearities are often used to broaden the spectral bandwidth of ultrafast pulses for supercontinuum generation or pulse compression [1]. The self-focusing nature of cubic Kerr nonlinearity usually limits the applicable pulse energy. An alternative way is using the second order optical nonlinearity, for instance the nonlinearity generated with cascaded second harmonic generation...
We show that effective soliton compression can be realized in strongly phase-mismatched quadratic media. Sub-15 fs pulses are experimentally generated directly from 10-mm-long bulk lithium niobate crystal by 120-fs input pulses at 1300 nm.
The elastic, thermal expansion, and plastic anisotropy of Sn is examined to assess how anisotropy affects the microstructural evolution and damage nucleation processes in SAC305 solder joints. Examination of all joints in a package indicates that upon solidification, crystal orientations are nearly randomly distributed. Initial studies of cracked joints after thermal cycling showed that orientations...
Summary form only given. Air plasma excited by a 800 nm femtosecond pulse with its second harmonic is capable of emitting intense terahertz (THz) radiation, which is of great interest due to its unique potential for stand-off THz applications. In this paper, we report the experimental observation of an electric dipole moment in such a plasma and its coherent control. In the experiment, a femtosecond...
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