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Femtosecond laser micro and nano-processing is a versatile material processing tool which has opened up a broad range of technologies and applications. However, in the particular context of the fabrication of deep trenches and channels, precise control of profile of the ablated structure is extremely challenging. We have recently developed a novel approach to fabricate controlled high aspect structures...
Femtosecond Bessel beams are demonstrated for high aspect ratio machining in the filamentation regime with water assistance. Taper-free microchannels and micro-trenches are demonstrated with aspect ratio up to 40 and diameters down to 2 µm.
We propose a new optoelectronic oscillator (OEO) architecture, able to generate at the same time ultra-low jitter optical pulses and ultra-low phase noise microwaves. This new system relies on the single-loop OEO, with two modulation branches: an intensity modulation for the formation of sinusoidal pre-pulses, and a phase modulation to chirp them. The train of chirped pre-pulses is then strongly amplified...
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