High-power high-brightness 2-μm continuous wave laser with a double-end diffusion-bonded Tm, Ho:YVO₄ crystal

【摘要】 This letter demonstrates an efficient high-power high-brightness 2-μm continuous-wave(CW) laser with double-end,diffusion-bonded Tm,Ho:YVO4crystal cooled with liquid N2.The reduction in thermal stress in the composite Tm,Ho:YVO4rod enabled the laser to achieve a laser output power of 23.4 W at 2.05 μm,which is 1.37 times higher than that of the non-composite Tm,Ho:YVO4rod.The corresponding slope efficiency is 37.3% and the optical-optical conversion efficiency is 35.4%.The beam quality M2 factor is about 1.85 at 20 W output level with circularly symmetric beam spot.更多还原

【Abstract】 This letter demonstrates an efficient high-power high-brightness 2-μm continuous-wave(CW) laser with double-end,diffusion-bonded Tm,Ho:YVO4crystal cooled with liquid N2.The reduction in thermal stress in the composite Tm,Ho:YVO4rod enabled the laser to achieve a laser output power of 23.4 W at 2.05 μm,which is 1.37 times higher than that of the non-composite Tm,Ho:YVO4rod.The corresponding slope efficiency is 37.3% and the optical-optical conversion efficiency is 35.4%.The beam quality M2 factor is about 1.85 at 20 W output level with circularly symmetric beam spot.更多还原