ML1XX27 is a high-power, high-efficient AlGaInP semiconductor laser from Mitsubishi Electric that provides a stable, single transverse mode oscillation with emission wavelength of 658nm and standard pulse light output of 350mW. ML1XX27 has a real-index-waveguide which improves the slope efficiency (reduction of the operating current) and the astigmatic distance. Also, ML1XX27 has a window-mirror-facet which improves the maximum output power. That leads to highly reliable and high-power operation at 75 °C.