Diode-pumped efficient high-power cascade Tm:GdVO₄ laser simultaneously operating at ∼2 μm and ∼2.3 μm

Abstract

The laser diode (LD)-pumped efficient high-power cascade Tm:GdVO 4 laser simultaneously operating on the 3 F 4 → 3 H 6 (at ∼2 μm) and 3 H 4 → 3 H 5 (at ∼2.3 μm) Tm 3+ transition was first reported in this paper. The cascade Tm:GdVO 4 laser generated a maximum total continuous-wave (CW) laser output power of 8.42 W with a slope efficiency of 40%, out of which the maximum ∼2.3 μm CW laser output power was 2.88 W with a slope efficiency of 14%. To our knowledge, 2.88 W is the highest CW laser output power amongst the LD-CW-pumped ∼2.3 μm Tm 3+ -doped lasers reported so far.

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