Fiber lasers and semiconductor lasers What is the difference? Fiber lasers and semiconductor lasers What is the difference? not the best answer fiber lasers, laser marking system is the focus, it is accepted by many low- power air-cooled laser diode as the pump source, through the process of multi- branch laser coupled into a single optical fiber, doped with rare earth elements in (Nd, Yb or Er) fiber as the laser medium, the mirrors, fiber Bragg grating as a resonator (resonant cavity that he is a fiber ), can be pulsed and continuous operation. new fiber laser with a single mode output, thermal characteristics, high efficiency, compact layout and other characteristics, especially for high- precision laser marking industry. typical 10-100KHz repetition rate of work, 10W-20W power output equal volume of fiber laser products, only 22 * ??25 * 10cm, and there is no water system, ground into small size big. semiconductor laser is a solid-state lasers. solid-state lasers is to use solid-state laser material things as a working laser. In 1960, TH Maiman invented the ruby ??laser is a solid-state laser, is the world boil laser Taiwan . solid state lasers generally work by the laser thing, excitation source, condenser cavity resonator mirrors, and power and other parts. accepted by this laser thing of solid work is to be a place to nurture stimulated emission effect of metal ions doped crystals made of. in the solid can occur by stimulated emission of the role of birth of the metal ions are mainly three types: (1) transition metal ions (such as Cr3 ); ⑵ most of the lanthanide ions ( such as Nd3 , Sm2 , Dy2 , etc.); ⑶ actinide metal ions (such as the U3 )。 crystal lasers with ruby ??(Al2O3: Cr3 ) and doped (can) neodymium (nv) Y (yi) aluminum garnet Stone (abbreviated as YAG: Nd3 ) are typical examples. glass laser is based on neodymium glass laser is a typical representative. also another kind of laser called the CO2 laser. short , that is, they fired the laser medium material are different. fiber laser gain medium is the use of optical fiber, semiconductor lasers used in semiconductor gain medium material, usually gallium arsenide, indium gallium and other applications. (Similarly, solid-state laser gain medium typically is a crystal or glass, ceramics and so on. gases is the use of helium-neon gas, carbon dioxide.) semiconductor laser is a light-emitting mechanism of particles in the conduction band and valence band of light occurs between the time of birth of quantum transitions, as the semiconductor, so the use of electrical stimulation then, is a direct electro-optical conversion. but less than enough to not be able to directly implement fiber optic conversion, you need to use light to pump the gain medium (typically a laser diode-pumped), which implements the optical conversion. fiber laser cooling is good, you can usually air-cooled. semiconductor laser affected by temperature, is very large, when the power is larger, the need for water.