Laser performance of in-band pumped Er : LiYF4 and Er : LiLuF4 crystals
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Spectroscopic properties of Er : LiLuF4 and Er : LiYF4 crystals in the spectral region near 1.5 mm and the lasing characteristics of these crystals under in-band pumping at a wavelength of 1522 nm are studied. With the Er : LiLuF4 crystal, the maximum slope efficiency with respect to the absorbed pump power was 44 % at a wavelength of 1609 nm. Continuous-wave operation of an in-band pumped Er : LiYF4 laser is obtained for the first time. The output power at a wavelength of 1606 nm was 58 mW with a slope efficiency of 21%.
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Laser performance of in-band pumped Er : LiYF4 and Er : LiLuF4 crystals / K. N. Gorbachenya [et al.] // Quantum Electronics. – 2016. – Vol. 46, № 2. – P. 95-99.