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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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double-claddingfiber opticsLiekki Yb2000-7/125low-index acrylate coatingNLightnonpolarization- and polarization-maintainingoctagonal claddingphotodarkening-resistantphotonicsProductsytterbium fibers

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