Numerical investigation of the effect of the temporal pulse shape on modification of fused silica by femtosecond pulses

Journal Article · Sun Sep 30 04:00:00 EDT 2012 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2012V042N09ABEH014960· OSTI ID:22066652

Dostovalov, A V; Wolf, A A; Babin, Sergei A; Dubov, M V; Mezentsev, V K

We report the results of numerical studies of the impact of asymmetric femtosecond pulses focused in the bulk of the material on the femtosecond modification of fused silica. It is shown that such pulses lead to localisation of absorption in the process of femtosecond modification and to a decrease in the threshold energy of modification. It is found that the optimal asymmetry parameters for reaching the maximum plasma density in the focusing region depend on the pulse energy: at an initial energy of about 100 nJ, it is preferable to use pulses with positive TOD; however, when the energy is increased, it is preferable to use pulses with negative TOD. This is explained by differences in the dynamics of the processes of absorption of energy of a pulse propagating in the material. (optical fibres, lasers and amplifiers. properties and applications)

• OSTI ID: 22066652
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 9 Vol. 42; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION
FOCUSING
MODIFICATIONS
NUMERICAL ANALYSIS
PLASMA DENSITY
PULSE SHAPERS
PULSES
SILICA
THRESHOLD ENERGY