A fiber laser is a type of laser that uses an active optical fiber as the gain medium. The optical fiber is doped with rare–earth elements such as erbium, ytterbium, or neodymium. Fiber lasers use a single–mode optical fiber as the gain medium, meaning that the light is kept as a single beam, as opposed to a multimode optical fiber, which allows multiple beams of light to travel through it. Fiber lasers are more efficient and require less power than traditional lasers and can be used for applications such as cutting, welding, marking, and engraving industrial sheet metals along with stainless steel, copper, and Titanium. There are mainly two types of fiber laser, MOPA fiber laser and Q-switched fiber laser. The main difference between the MOPA and Q-switched fiber is laser is: You…