How Does a Fiber Laser Work (And What Are Its Components)? Fiber lasers use pump light from what is called laser diodes. These diodes emit light that is sent into the fiber-optic cable. Optical components located in the cable are then used to generate a specific wavelength and amplify it.

A fibre laser is what’s known as a “solid state” machine. It generates a highly focused beam using a “seed laser” which is then amplified many times over using glass fibre. This creates a small diameter laser beam which is up to 100 times more intense than a CO2 beam.

This makes a fibre laser much more energy efficient than the CO2 alternative.