NuGEN9 active fibers offer the most advanced glass composition and fiber design and are all precision matched to their passive counterpart ensuring excellent splice compatability and low loss. This fiber is a Yb-doped Large Mode Area (LMA) active double clad fiber featuring a 20 micron diameter core and 400 micron clad diameter with a low NA (0.065) core. This fiber is ideal for high power fiber lasers and amplifiers used in military, industrial, and medical applications. NuGEN9 fibers feature an optimized glass composition enabling higher absorption with superior photodarkening performance. These fibers are proof-tested to 100 kpsi, an industry requirement for long term reliability. NuGEN9 fibers are exclusively offered with Coherent proprietary NuCOATFA coating technology with the best wet and dry heat performance available, ensuring excellent preservation of beam quality and extended operating life.