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Inverted-V chirped phased arrays of gain-guided GaAs/GaAlAs diode lasers

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Abstract

Phased arrays of diode lasers can produce single-lobed diffraction-limited beams directed normal to the array facet only if they oscillate in the fundamental supermode.1,2 However, most phased arrays demonstrated thus far exhibited double-lobed beams because of their tendency to operate in the higher-order supermodes. Recently, we have shown theoretically that efficient supermode control can be achieved by employing chirped array structures in which the channel phase velocities vary across the array.3 The present work describes the lasing characteristics of inverted-V chirped arrays of GaAs/GaAlAs lasers, which exhibit single-lobed diffraction-limited beams directed normal to the array facet.

© 1985 Optical Society of America

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