A Guide to How Fiber Lasers Work?

The working principle includes several key steps:

Energy Source Injection: Like a lamp filled with fuel, a fiber laser first requires an energy source (usually electricity) to "ignite" the laser.

Excitation Light Medium: Within the optical fiber, a special material (such as glass or optical fiber doped with rare earth elements) acts as the laser's "fuel." Electricity excites this material, much like lighting a flame.

Light Amplification: The excited material releases light (laser), which then becomes increasingly stronger through reflection and multiple amplification within the optical fiber, much like pushing a bicycle faster and faster.

Laser Output: After multiple amplifications, the light is output from one end of the optical fiber as a concentrated, extremely bright laser beam, similar to the beam from a laser pointer.