Abstract
The planar waveguide in Nd:YAG crystal was produced by the 1.4 GeV Kr ion irradiation at ultra-low fluence of 1.2×10<sup>9</sup> ions/cm<sup>2</sup>. The propagation loss is measured to be ~2.1 dB/cm at wavelength of 632.8 nm by using the backreflection method. Under optical pumping of 808 nm light continuous wave lasers at 1065 nm have been realized. The maximum output power is 49.3 mW and the slope efficiency is 45.6%.
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