Abstract
High-power monolithically integrated broad-area master oscillator power amplifiers (MBA-MOPAs), consisting of a distributed-Bragg-reflector (DBR) laser, a preamplifier, a coherent beam expander, and a broad area power amplifier producing up to 800 mW in a single spectral and spatial mode, are fabricated. The MBA-MOPA operates in an edge-emitting configuration with a primarily single-lobe output having a transverse beam divergence of 0.45 degrees , indicating a uniform phase over the 130- mu m emitting aperture.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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