266nm Lasers, specifically Diode-Pumped Solid-State (DPSS) Lasers, utilize the fourth harmonic of Nd:YAG laser material at 1064nm. Given a particular laser, with a particular fundamental wavelength, fourth harmonic generation is less efficient and cannot achieve the same energy levels compared to its lower-order harmonic counterparts.
These high power, nanosecond 266nm lasers are available with either free-space or fiber-coupled output and a variety of pulse energies depending on the applications needs. Typical applications for these UV Lasers include Optogenetics, Laser Induced Breakdown Spectroscopy, Time-of-Flight Spectroscopy, Photoluminescence, and more.
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