Some things are obvious. A fiber laser has a smaller laser "generator" than a CO2-resonator. Actually, the fiber laser is made by banks of diodes which are combined in a small module. These modules can have a power range from 600 to 1,500 W. To create the final powered resonance, multiple modules are spliced together. This is usually the same size as a small filing cupboard. The fiber-optic cables channel the light and amplify it. Fiber-optic cables transmit the same light as when they were generated, with no loss of power and quality. The fiber-optic cable is then adjusted and focused to cut the appropriate material.
Another thing to remember is that traditional methods of checking for twists and bows in the tube may take as long as five to seven seconds before cutting begins. You have to compromise accuracy for productivity with traditional touch sensing. This can be frustrating, especially in this age of fiber laser cutting. However, working with tube is much more difficult than working with sheet metal.