This work reports continuous laser action at room temperature in LiNbO3:Nd3+ channel waveguides, fabricated by Zn diffusion. The absorbed pump power at the threshold was 1.25 mW and a slope efficiency of 20% was obtained. With our available pump power the laser could emit up to 0.14 mW without exhibiting any photorefractive damage.
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Paolo et al. (2001) studied this question.
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