Consolidated Master Oscillator Power Amplifier (MOPA) laser modules and method of fabrication thereof. A MOPA comprises a prefabricated chassis, comprising a plurality of surfaces, a master oscillator laser (MO), enduringly affixed to at least one first surface out of the plurality of surfaces, a power amplifier (PA), enduringly affixed to at least one second surface out of the plurality of surfaces, wherein a spatial relationship between the at least one first surface and the at least one second surface determines an alignment between the MO and the PA, and a beam transfer system (BTS), enduringly affixed to the prefabricated chassis, the BTS comprising a plurality of optical elements for transferring light outputted from the MO to the PA for amplification.