Abstract
We report a highly efficient cryo-cooled eye-safe laser operation of a resonantly-pumped (in-band) Er³⁺:GdVO₄ single crystal. The maximum continuous wave (CW) power of 10.3 W with 84% slope efficiency was achieved at 1598.7 with pumping at 1538.6 nm by a spectrally-narrowed Er-fiber laser. Under the 1529 nm resonant pumping by a commercially available diode bar stack operating in a quasi-CW (QCW) mode, the laser delivered 37 W of output power with 68% slope efficiency. This is believed to be the first reported cryo-cooled Er³⁺:GdVO₄ laser, resonantly-pumped into the ⁴I₁₅/₂ →⁴I₁₃/₂ transition.
Highlights
Erbium-doped yttrium vanadate material (Er)-doped laser materials have been established as one of the best choices in designing resonantly-pumped, highly scalable eye-safe lasers operating in the 1.6 micrometer wavelength range
Under the 1529 nm resonant pumping by a commercially available diode bar stack operating in a quasi-continuous wave (CW) (QCW) mode, the laser delivered 37 W of output power with 68% slope efficiency
High efficiency can potentially be expected for Er:GdVO4 laser
Summary
We report a highly efficient cryo-cooled eye-safe laser operation of a resonantly-pumped (in-band) Er3+:GdVO4 single crystal. The maximum continuous wave (CW) power of 10.3 W with 84% slope efficiency was achieved at 1598.7 with pumping at 1538.6 nm by a spectrally-narrowed Er-fiber laser. Under the 1529 nm resonant pumping by a commercially available diode bar stack operating in a quasi-CW (QCW) mode, the laser delivered 37 W of output power with 68% slope efficiency. This is believed to be the first reported cryo-cooled Er3+:GdVO4 laser resonantly-pumped into the 4I15/2 →4I13/2 transition.
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