Can a 1 watt laser burn skin
All types of materials can be cut by laser machines. It all depends on the type of laser machine that you have. The CO2 laser machine cannot cut through reflective metals such as aluminum, copper, or brass. They can, however, cut through non-metallic materials such as wood and plastic.
Fiber lasers are solid lasers. But, they are also different from diode Lasers. There is a big difference in their capabilities.