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Solid-state lasers with a rod of yttrium-aluminum-garnet (YAG) crystal doped with ytterbium (Yb), a rare earth element, as the active medium. Their emission wavelength is 1,030 nm (near infrared), although it is sometimes operated at 1,050 nm. These lasers are usually operated in pulsed or mode-locked modes; they typically work as a high-power diode-pumped laser source. Yb:YAG lasers can be used to generate ultrashort pulses (in the range of the femtoseconds) using passive mode locking. Yb:YAG lasers are mainly intended for very accurate cutting such as that performed in ophthalmic procedures (e.g., refractive surgery, keratoplasty, lamellar resection) and/or in other applications when ultra-short high-power pulses are required.
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