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Physical Sciences and Mathematics Commons™
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Full-Text Articles in Physical Sciences and Mathematics
Calculation Of Nonlinear Optical Damage From Space-Time-Tailored Pulses In Dielectrics, Thomas E. Lanier, Jeremy R. Gulley
Calculation Of Nonlinear Optical Damage From Space-Time-Tailored Pulses In Dielectrics, Thomas E. Lanier, Jeremy R. Gulley
Faculty and Research Publications
Control of the time duration of a laser pulse as it focuses spatially in a material provides a means for delaying the onset of nonlinear e↵ects during propagation. We investigate simultaneous space-time focusing (SSTF) of femtosecond radially-chirped annular pulses in Kerr dielectrics. The energy and temporal chirp of pulses incident upon a grating-grating-lens system are varied in simulations that solve the unidirectional pulse propagation equation. This system is modeled by inserting transformations that act on the electric field obtained from propagation from one component to the next. The propagation is coupled to the time evolution of the free charge density …
Plasma Generation By Ultrashort Multi-Chromatic Pulses During Nonlinear Propagation, Jeremy R. Gulley, Jiexi Liao, Thomas E. Lanier
Plasma Generation By Ultrashort Multi-Chromatic Pulses During Nonlinear Propagation, Jeremy R. Gulley, Jiexi Liao, Thomas E. Lanier
Faculty and Research Publications
The use of femtosecond lasers in industrial, biomedical, and defense related applications during the last 15 years has necessitated a detailed understanding of pulse propagation coupled with ultrafast laser-material interactions. Current models of ultrashort pulse propagation in solids describe the pulse evolution of fields with broad spectra and are typically coupled to models of ionization and laser-plasma interaction that assume monochromatic laser fields. In this work we address some of the errors introduced by combining these inconsistent descriptions. In particular, we show that recently published experiments and simulations demonstrate how this contradiction can produce order-of-magnitude errors in calculating the ionization …