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Design and characterization of a nonuniform linear vertical-cavity surface-emitting laser array with a Gaussian far-field distribution

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Abstract

A 980nm bottom-emitting vertical-cavity surface-emitting laser array with a nonuniform linear arrangement is reported to realize emission with a Gaussian far-field distribution. This array is composed of five symmetrically arranged elements of 200μm, 150μm, and 100μm diameter, with center spacing of 300μm and 250μm, respectively. An output power of 880mW with a high power density of 1kW/cm2 is obtained. The divergence angle is below 20° in the range of operating current from 0A to 6A. The theoretical simulation of the near-field and the far-field distribution is in good agreement with the experimental result. The comparison between this nonuniform linear array, the single device, and the conventional two-dimensional array is carried out to demonstrate the good performance of the linear array.

© 2009 Optical Society of America

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