Laser Components and Accessories

Laser and Amplifier Fibers

Scale lasers to higher powers with a wide selection of rare earth doped Ytterbium, Erbium, Erbium/Ytterbium, and Thulium active fibers, plus matched passive fibers. 

Coherent laser and amplifier fibers eliminate SRS and TMI, and feature high mode quality, excellent pump light absorption, long lifetime, and exceptionally low photodarkening, for reliable, extended operation in even the most demanding applications.

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Key Product Benefits

Choose from numerous options in core and cladding structure and size, active and passive dopants, and coating materials.

Product Specifications




High conversion efficiency: power amplifiers to 90%

Narrow linewidth at kW levels

Near diffraction limited beam quality eliminates SRS and TMI

Extended service life in challenging deployment conditions 

Tested to 100 kpsi 

High dynamic fatigue strength 

Excellent damp heat resistance 

Unique core and cladding structures 

Polarization maintaining

Ytterbium, Erbium, Erbium/Ytterbium, Holmium, Neodymium and Thulium dopants 

Featured Blog

Active Optical Fibers May Be in Your Next Car 

Learn how active optical fibers enable fiber lasers and fiber amplifiers, which power applications as diverse as satellite communications, autonomous vehicles, remote sensing, inertial navigation, surgery, and materials processing.



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See how we manufacture fibers used in lasers for surgery, space, LiDAR, and more. From pre-forming to fiber draw and winding to combining, you'll find the type of fiber you need for your application from Coherent.

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