Coherent addition of AlGaAs lasers using microlenses and diffractive coupling

James R. Leger; Miles L. Scott; Wilfrid B. Veldkamp

doi:10.1063/1.99621

Coherent addition of AlGaAs lasers using microlenses and diffractive coupling

James R. Leger, Miles L. Scott, Wilfrid B. Veldkamp

Electrical and Computer Engineering

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Abstract

A near single-lobed far-field pattern was obtained from coherent operation of a nonevanescently coupled AlGaAs laser diode array. A diffractive microlens array collimated the individual beams to approximate a plane wave, and diffractive coupling from an external cavity mirror provided mutual coherence. A diffraction-limited far-field pattern was observed with 82% of the power contained in the central lobe. The method is directly applicable to two-dimensional laser arrays and can be implemented as a single thin optical element.

Original language	English (US)
Pages (from-to)	1771-1773
Number of pages	3
Journal	Applied Physics Letters
Volume	52
Issue number	21
DOIs	https://doi.org/10.1063/1.99621
State	Published - 1988

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Copyright 2007 Elsevier B.V., All rights reserved.

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abstract = "A near single-lobed far-field pattern was obtained from coherent operation of a nonevanescently coupled AlGaAs laser diode array. A diffractive microlens array collimated the individual beams to approximate a plane wave, and diffractive coupling from an external cavity mirror provided mutual coherence. A diffraction-limited far-field pattern was observed with 82% of the power contained in the central lobe. The method is directly applicable to two-dimensional laser arrays and can be implemented as a single thin optical element.",

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AU - Leger, James R.

AU - Scott, Miles L.

AU - Veldkamp, Wilfrid B.

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Y1 - 1988

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AB - A near single-lobed far-field pattern was obtained from coherent operation of a nonevanescently coupled AlGaAs laser diode array. A diffractive microlens array collimated the individual beams to approximate a plane wave, and diffractive coupling from an external cavity mirror provided mutual coherence. A diffraction-limited far-field pattern was observed with 82% of the power contained in the central lobe. The method is directly applicable to two-dimensional laser arrays and can be implemented as a single thin optical element.

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Coherent addition of AlGaAs lasers using microlenses and diffractive coupling

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