Thulium channel waveguide laser with 1.6&#x2009;&#x2009;W of output power and &#x223C;80% slope efficiency

K. van Dalfsen; S. Aravazhi; C. Grivas; S. M. García-Blanco; M. Pollnau

doi:10.1364/OL.39.004380

Optics Letters
Vol. 39,
Issue 15,
pp. 4380-4383
(2014)
•https://doi.org/10.1364/OL.39.004380

Thulium channel waveguide laser with 1.6 W of output power and ∼80% slope efficiency

K. van Dalfsen, S. Aravazhi, C. Grivas, S. M. García-Blanco, and M. Pollnau

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K. van Dalfsen, S. Aravazhi, C. Grivas, S. M. García-Blanco, and M. Pollnau, "Thulium channel waveguide laser with 1.6 W of output power and ∼80% slope efficiency," Opt. Lett. 39, 4380-4383 (2014)

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Abstract

Laser experiments were performed on buried, ridge-type channel waveguides in 8 at.% thulium-doped, yttrium–gadolinium–lutetium co-doped potassium double tungstate. By pumping with a Ti:sapphire laser at 794 nm, 1.6 W of output power at 1.84 μm with a maximum slope efficiency of $\sim 80 %$ was obtained in a laser resonator with a high output-coupling degree of 89%. To the best of our knowledge, this result represents the most efficient 2-μm channel waveguide laser to date.

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				$E \| \| N_{g}$		$E \| \| N_{m}$		$E \| \| N_{p}$
$Y^{3 +}$	${Gd}^{3 +}$	${Lu}^{3 +}$	${Tm}^{3 +}$	B	C	B	C	B	C
100	0	0	0	3.11897	0.02761	2.95349	0.02628	2.80731	0.02485
40	29.48	29.02	1.5	3.14470	0.02764	2.97916	0.02643	2.84836	0.02510
40	29.30	27.70	3.0	3.14609	0.02770	2.97860	0.02646	2.84913	0.02503
0	49.25	49.25	1.5	3.16556	0.02781	2.99826	0.02650	2.88065	0.02541
0	47.00	33.00	20.0	3.16541	0.02792	2.99883	0.02651	2.88088	0.02533

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Optics Letters