Abstract
This paper presents a comparative study of single pass gain of a Nd:glass laser amplifier using geometrically identical reflector cavities of different reflector materials or surface treatment. An improvement in the small-signal single-pass gain by a factor of 2 and 1.5 is observed for an electro-polished aluminum cavity over a gold-plated cavity and mechanically polished aluminum cavity, corresponding to an increase of 25% and 15% respectively in the pump coupling efficiency.
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