Room-temperature Tm:YAG ring laser with 150 mW single-frequency output power at 2.02 [micro sign]m

Efficient room-temperature operation of a diode-pumped Tm:YAG laser is demonstrated in a composite-cavity non-planar ring resonator. By longitudinal pumping in continuous wave operation, a single-frequency output power up to 150 mW and a multimode power greater than 0.5 W are obtained for the Tm 3H5–3H6 quasi-three-level transition at 2.02 µm.