Abstract

To achieve high output power and/or high efficiencies, laser systems are often designed to operate with either high-order or multiorder transverse modes. This comes at the expense of beam quality. Herein, a technique for converting the two lobes of a higher-order (Hermite–Gaussian TEM10) beam into two TEM00 beams is discussed. It is shown that nearly 94% of the power in a single lobe of the TEM10 beam spatially overlaps an appropriately chosen TEM00 beam. Beam quality (defined by the M2 beam quality factor) is increased by separating the two TEM10 lobes with an edge aperture. A single-mode optical fiber can be used as a spatial filter to eliminate residual higher-order mode content. This study suggests that more than 90% of the power in a TEM10 beam can be converted into two separate TEM00 beams.

© 2010 Optical Society of America

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