The total laser power respectively output power of a laser is the total result of all built in laser sources. This power is measured in mW (Milliwatts) or W (Watts).
The power specification can be given „before“ or „after“ optics. „Before“ means directly at the laser sources, „after“ means measurement after the laser aperture.
Values given „after optics“ / “after aperture“ already comprise power loss due to optical components.