Abstract
The lateral coherence of an extremely broad-area laser diode is examined. The device was fabricated using molecular-beam epitaxy (MBE). For a 350- mu m-wide mesa laser, a single-lobed phase-locked narrow beam was obtained owing to the use of a high-uniformity quantum well graded-index waveguide separate confinement heterostructure (GRIN-SCH) with a short-period (AlGaAs)(GaAs) superlattice MBE-fabricated barrier layer.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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