The RAMAN spectrometer, a scientific instrument of a rover to analyze minerals on the surface of Mars, uses a miniaturized and space-qualified laser source. Its core is a green diode-pumped solid-state laser with frequency doubling working at a wavelength of 532 nm and more than 100 mW output power. Though it weighs only 50 g including its housing, the sensitive optical components are constructed to withstand heavy vibrations as well as harsh thermal and radiation conditions.