Near-diffraction-limited diode end-pumped 2 µm Tm:YAG Innoslab laser

A compact, near-diffraction-limited laser diode end-pumped 2 µm Tm:YAG Innoslab laser was demonstrated for the first time. A maximum output power of 36.4 W was achieved under the incident pump power of 184 W, corresponding to a slope efficiency of 23.4% with respect to the incident pump power. The beam quality factors M 2 were measured to be 1.44 in the stable direction and 1.23 in the unstable direction.

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