We report continuous wave 1.06μm laser operation in an optical waveguide fabricated in a Nd:YAG ceramic by femtosecond laser writing. Single mode and stable laser oscillation have been achieved by using the natural Fresnel reflection for optical feedback. Output laser power in excess of 80mW and a laser slope efficiency of 60% have been demonstrated.
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Torchia et al. (2008) studied this question.
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