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Photodarkening-Resistant Fibers
Mar 2009
nLIGHT Corp.Request Info
VANCOUVER, Wash., March 16, 2009 – Available from nLight Corp. are highly doped photodarkening-resistant ytterbium fibers with up to 60 percent higher absorption at 920 nm and pump conversion efficiencies of higher than 75 percent.  nLight_Photodarkening.jpg

The fibers are available in core/clad geometries ranging from 7/125 µm to 30/250 µm in nonpolarization and polarization maintaining versions. Available with double-cladding, the Liekki Yb2000-7/125 fibers are suitable for low-power amplifier and continuous-wave laser applications, and their flat absorption profile enables the use of 940-nm pumps.

Cladding absorption at 920 nm is 1.0 ±0.2 dB/m, with a numerical aperture of less than 0.46. Core numerical aperture is 0.19 ±0.02, and core centricity error is less than 1.5 µm. The cladding geometry is octagonal, and the coating material is low-index acrylate. Coating diameter is 245 ±15 µm.

For more information, visit:

nLight Corp.
5408 NE 88th St.
Vancouver, WA 98665
Phone: (360) 566-4460
Fax: (360) 546-1960


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The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
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