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Pulsed Nd:YAG and Er:YAG lasers are used in laser tattoo removal and laser range finders among other applications. Pulsed lasers are also used in soft-tissue surgery. When a laser beam comes into contact with soft-tissue, one important factor is to not overheat surrounding tissue, so necrosis can be prevented. [ 3 ]
Q-switching, sometimes known as giant pulse formation or Q-spoiling, [1] is a technique by which a laser can be made to produce a pulsed output beam. The technique allows the production of light pulses with extremely high peak power, much higher than would be produced by the same laser if it were operating in a continuous wave (constant output) mode.
Graph showing the history of maximum laser pulse intensity since 1960. Since the early period of laser history, laser research has produced a variety of improved and specialized laser types, optimized for different performance goals, including: new wavelength bands; maximum average output power; maximum peak pulse energy; maximum peak pulse power
Laser types with distinct laser lines are shown above the wavelength bar, while below are shown lasers that can emit in a wavelength range. The height of the lines and bars gives an indication of the maximal power/pulse energy commercially available, while the color codifies the type of laser material (see the figure description for details).
The depth over which the laser energy is absorbed, and thus the amount of material removed by a single laser pulse, depends on the material's optical properties and the laser wavelength and pulse length. The total mass ablated from the target per laser pulse is usually referred to as ablation rate.
The pulse is stretched in time so that the energy is not all located at the same point in time and space. This prevents damage to the optics in the amplifier. Then the pulse is optically amplified and recompressed in time to form a short, localized pulse. All optics after this point should be chosen to take the high energy density into ...
Pulse energy [J] Pulse duration [fs] Peak power [PW] Status Nova: Lawrence Livermore National Laboratory United States: Nd:glass: 660 440 1.5 Decommissioned NIF-ARC: Lawrence Livermore National Laboratory United States: Nd:glass 400–1700 1300–38 000 1.5 Operation Texas Petawatt Laser [3] University of Texas, Austin United States: Nd:glass ...
It is designed to produce brighter, more penetrating, higher-energy x rays. ARC became the world's highest-energy short-pulse laser, capable of creating picosecond-duration laser pulses to produce energetic x rays in the range of 50–100 keV. [110]
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