Abstract

This paper presents the concept of constant-fluence amplification. It refers to the fact that laser fluence anywhere in the amplifier gain medium is identical to the design fluence Edesign, which represents the maximum allowed fluence in consideration of the laser-induced damage threshold (LIDT). Based on this concept, we explore ideal amplifier model (IAM) and near-ideal amplifier chain (NIAC) and propose an optimal NIAC design method and analytically offer an indicator of the extraction efficiency. Finally, the paper discusses the influences of losses on the NIAC’s extraction efficiency.

© 2013 Optical Society of America

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