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van Dalfsen, K. and Aravazhi, S. and Grivas, C. and García Blanco, S.M. and Pollnau, M.
(2012)
Thulium channel waveguide laser in a monoclinic double tungstate with 70% slope efficiency.
Optics letters, 37 (5).
pp. 887-889.
ISSN 0146-9592
*** ISI Impact 3,399 ***
Full text available as:
Official URL: http://dx.doi.org/10.1364/OL.37.000887  AbstractLaser experiments were performed on buried, ridge-type channel waveguides in an 8 at. % thulium-doped, yttrium-gadolinium-lutetium codoped monoclinic double tungstate. A maximum slope efficiency of 70% and output powers up to 300 mW about 2.0 μm were obtained in a mirrorless laser resonator, by pumping with a Ti:sapphire laser near 800 nm. To the best of our knowledge, this result represents the most efficient 2 μm channel waveguide laser to date. Lasing is obtained at various wavelengths between 1810 nm and 2037 nm.
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