Fiber laser model

Fiber laser refers to a laser that uses rare earth-doped glass fiber as the gain medium. Fiber lasers can be developed on the basis of fiber amplifiers: under the action of pump light, a high power density can be easily formed within the fiber, causing a "particle number inversion" of the laser energy level of the laser working substance. When a positive feedback loop (forming a resonant cavity) is appropriately added, a laser oscillation output can be formed.