In-band pumped room-temperature Er:KY(WO4)2 laser emitting around 1:6 mm
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We present efficient continuous-wave operation of an Er:KY(WO 4)2 crystal under in-band pumping by a compact diode-pumped Er, Yb:GdAl3(BO3)4 laser. Maximum slope efficiency of 27% and output power of 35 mW at 1609.5 nm were obtained with beam propagation factor M2 < 1:2. Absorption and stimulated emission cross-section spectra, as well as the radiative lifetime of the 4I13=2 energy level, were determined.
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In-band pumped room-temperature Er:KY(WO4)2 laser emitting around 1:6 mm / K. N. Gorbachenya [et al.] // Laser Physics. – 2013. – Vol. 23, № 12. – P. 1-4.