Abstract

In recent years, the ytterbium ion has been recognized as a dopant having attractive potential for laser diode pumped solid state lasers. One of the features of the Yb-doped materials is that it can incorporate very high concentrations of the Yb ions without concentration quenching. Highly doped Yb:YAG lasers have been realized previously and highly efficient oscillation was demonstrated close to the laser quantum-defect-limited efficiency of 90% in the Yb:YAG by high intensity pumping.1 The high laser ion-doped materials with short absorption length permit the use of thin crystals. Thin crystals are useful for high efficiency oscillation with high intensity pumping by low quality beam of laser diodes without reducing of the mode-matching efficiency.

© 2007 IEEE

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