Papers by aliiiiiiiiiiiiiiii aliiiiiiiiiiiiiiii
… , IEEE Journal of, 1990
We report a sensitive single-beam technique for measuring both the nonlinear refractive index and... more We report a sensitive single-beam technique for measuring both the nonlinear refractive index and nonlinear absorption coefficient for a wide variety of materials. We describe the experimental details and present a comprehensive theoretical analysis including cases where nonlinear refraction is accompanied by nonlinear absorption. In these experiments, the transmittance of a sample is measured the propagation path ( z ) of a focused Gaussian beam. The sign and magnitude of the nonlinear refraction are easily deduced from such a transmittance curve (Z-scan). Employing this technique, a sensitivity of better than 1/300 wavefront distortion is achieved in n2 measurements of BaF2 using picosecond frequency-doubled Nd:YAG laser pulses. In cases where nonlinear refraction is accompanied by nonlinear absorption, it is possible to separately evaluate the nonlinear refraction as well as the nonlinear absorption by performing a second Z scan with the aperture removed. We demonstrate this method for ZnSe at 532 nm where two-photon absorption is present and n2 is negative.
Science …, 2001
Insert size and SD are calculated from assembly of mates on contigs. †% Mates is based on laborat... more Insert size and SD are calculated from assembly of mates on contigs. †% Mates is based on laboratory tracking of sequencing runs. 825 bases contributed by all centers were shredded into faux reads resulting in 2.96ϫ coverage of the genome.
Nonlinear Oscillations is a self-contained and thorough treatment of the vigorous research that h... more Nonlinear Oscillations is a self-contained and thorough treatment of the vigorous research that has occurred in nonlinear mechanics since 1970. The book begins with fundamental concepts and techniques of analysis and progresses through recent developments and ...
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Papers by aliiiiiiiiiiiiiiii aliiiiiiiiiiiiiiii