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The formation and the interaction of multiple cavities, induced by tightly focused femtosecond laser pulses, are studied using a developed numerical tool, including the thermo-elasto-plastic material response. Simulations are performed in fused silica in cases of one, two, and four spots of laser energy deposition. The relaxation of the heated matter, launching shock waves in the surrounding cold...
We demonstrate the beneficial effect of femtosecond bursts for energy concentration during volume processing of transparent material. By single pulse energy redistribution in burst sub-pulses, nonlinear effects can be significantly reduced. A 25 ns time delay between sub-pulses leads to temperature high enough to induce in-volume crack. These cracks can be controlled to obtain high speed and high...
We present the use of a compact femtosecond laser with 300-fs pulse duration and pulse energy on the order of 10s of μJ for the cutting of glass by controlled fracture propagation.
Bulk machining of glasses with femtosecond laser pulses enables the fabrication of embedded optical functions. Due to the nonlinear character of the laser-matter interaction, structural modifications can occur within the focal region. To reach a full control of the process, ways of controlling the deposition of the laser energy inside the material have to be unveiled. From static and time-resolved...
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