Abstract
Efficient operation of 4F3/2–4I9/2 transition in diode-end-pumped Nd:YAG lasers at 946nm is reported. At incident pump power of 23.9W, up to 6.6W continuous-wave (cw) output power has been obtained with a conventional non-composite Nd:YAG rod, leading to 27.1% optical-to-optical efficiency and 29.8% slop efficiency. To our knowledge, this is the highest value of LD pumped Nd:YAG 946nm laser with a conversional Nd:YAG rod as gain medium. By intracavity frequency-doubling with an LBO crystal in a compact three-element resonator, cw output power of 1.05W in the blue spectral range at 473nm is achieved with 8% optical-to-optical conversion efficiency versus incident pump power of 13.1W. The instability of the blue laser is less than 1% during half an hour.
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