Download Ultrafast Lasers: Technology and Applications by Martin E. Fermann, Almantas Galvanauskas, Gregg Sucha PDF

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By Martin E. Fermann, Almantas Galvanauskas, Gregg Sucha

Protecting high-energy ultrafast amplifiers and solid-state, fiber, and diode lasers, this reference examines fresh advancements in high-speed laser expertise. It provides a entire survey of ultrafast laser know-how, its purposes, and destiny developments in numerous clinical and business parts. subject matters contain: micromachining functions for metals, dielectrics, and organic tissue; complicated electronics and semiconductor processing; optical coherence tomography; multiphoton microscopy; optical sampling and scanning; THz new release and imaging; optical verbal exchange structures; absolute part keep an eye on of optical signs; and extra.

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Extra resources for Ultrafast Lasers: Technology and Applications

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The longer time constant results in a reduced saturation intensity for part of the absorption, which facilitates self-starting modelocking, whereas the faster time constant is more effective in shaping subpicosecond pulses. Therefore, SESAMs make it possible to easily obtain self-starting modelocking in most cases. SESAMs are quite robust devices. The ratio of the damage fluence to the saturation fluence is typically on the order of 100, so that a long device Ultrafast Solid-State Lasers 37 lifetime can be achieved with the usual parameters of operation (pulse fluence % 3–10 times the saturation fluence).

The relatively poor thermal properties make high-power operation challenging. , 2000b). Here, a strongly elliptical pump beam and laser mode allow the use of a fairly thin gain medium that can be efficiently cooled from both flat sides. The resulting nearly one-dimensional heat flow reduces the thermal lensing compared to cylindrical rod geometries if the aspect ration is large enough. Yb3þ :YAG has thermal properties similar to those of Nd3þ :YAG and at the same time a much larger amplification bandwidth.

16), is an empirical fit to results from numerical simulations. It holds if the absorber is operated at roughly 3–5 times the saturation fluence. For significantly weaker or stronger absorber saturation, the pulse duration gets somewhat longer. In contrast to the situation for fast absorbers, the influence of self-phase modulation always makes the pulses longer, apart from the instability occurring when the effect is too strong. Particularly in femtosecond lasers, it can be difficult to make the nonlinearity weak enough.

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