Several holographic and interferometric applications would benefit significantly from a diode laser based coherent light source near 633 nm. For this purpose a miniaturized master-oscillator power-amplifier (MOPA) was developed. The MOPA is integrated in a sealed package together with a custom-built micro-optical isolator to shield the MO from optical feedback. The MOPA reaches an optical output power of up to 70 mW near 633 nm. The power is boosted by a second, external amplifier to more than 500 mW. The package offers space for the future integration of the second amplifier stage.