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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/29604

Title: Burst-train Generation for Femtosecond Laser Filamentation-driven Micromachining
Authors: Rezaei, Saeid
Advisor: Herman, Peter R.
Department: Electrical and Computer Engineering
Issue Date: 25-Aug-2011
Abstract: Bursts of femtosecond laser pulses with a repetition rate of 38.5MHz were created by integrating a purpose-built burst resonator system with a Ti: Sapphire laser system. The timing control system in this work provided flexibility for generation of any desirable pulse train profile in the burst envelope. These laser pulses further have been used for high aspect ratio hole drilling inside glass materials. High repetition rate of the pulses produces heat accumulation effects during the laser machining interaction which provided the possibility of deeper etching, increased the aspect ratio, and mitigated cracks and damages effects of single pulses. During the process, time-resolved nanosecond scale side-view images have been recorded with a time-gated intensified-CCD camera enabling the observation of transient effects during the laser machining process. These side-view images further have been used to assess the physics of burst interaction and illustrate benefits and disadvantages of high repetition rate laser pulses.
URI: http://hdl.handle.net/1807/29604
Appears in Collections:Master

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