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By numerically solving the time-dependent Schrödinger equation, we investigate the optimum driver pulse duration for 400 nm, 800 nm and 2 micron driver pulses for a given harmonic for hydrogen. In this thesis, intensity and wavelength limits at which the Lorentz displacement becomes significant have been investigated. This Lorentz displacement increases as we move towards longer wavelengths and higher intensities. Wavelength Point Discontinuity (nm) (dB) 1310 0.05 1550 0.05 Cable Cutoff Wavelength ( ccf ) ccf 1260 nm Mode-Field Diameter Wavelength MFD (nm) (µm) 1310 9.2 ± 0.4 1550 10.4 ± 0.5 Dispersion Wavelength Dispersion Value (nm) ps/(nmkm) 1550 18.0 1625 22. The Lorentz force can displace the electron wave packet perpendicular to the direction of polarization and as a result reducing the recombination amplitude.
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In HHG, harmonics are generated by recombination of an electron wave packet, moving under the influence of the driver pulse, with its parent atom. It is well known that a charge moving in a magnetic field experiences a Lorentz force. Current interest is directed toward the InAsSb photodetectors cut-off wavelength (. The physical ramification of the Dipole Approximation is that it neglects the magnetic field component to the driver field. Because of this, here only main trends in material fabrication are covered. Most of the current literature on HHG uses the Dipole Approximation for calculation of harmonic spectrum. Large electric field is undesirable because it leads to large plasma generation which reduces harmonic generation due to phase mismatch and ground state depletion. The advantage of longer wavelengths is that the cut-off of the harmonic spectrum can be increased without the need for large electric fields. In the experiment care was taken to maintain identical measurement condi-tions, especially the length of the fiber and the launch condition. Pre-Travel: the first part of the traversing length.Many researchers are pushing for long wavelength driver pulses for High Harmonic Generation (HHG). the laser can be inferred from the change in the cut-off wavelength of the fiber.Evaluation Length: is the part of the traversing length from where the values of the surface parameters are determined.It is the total of Pre-travel, evaluation length and post travel Traversing Length: is the overall length traveled by the stylus when acquiring the traced profile.
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Its length is equal to the cutoff wavelength.