The smile of a laser diode bar has a dramatic impact on the beam quality in the fast axis and significantly degrades the beam parameter product. We present an optical design that allows for a compensation of the laser diode smile by the use of micro-optics. The possibility to compensate the smile of an arbitrary laser diode bar by using a given set of optical modules is evaluated. This technique potentially increases the yield of suitable diode bars in the production process and the efficiency for fiber coupling applications. (C) 2018 Optical Society of America
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