This Neodymium Polarisation Maintening fiber with 20-micron core would be ideal for building high-power fiber-based laser operating in the 0.9 µm window. This new version of this unique fiber brings better beam quality and improved efficiency through a precisely controlled host composition. Compared to a standard Neodymium fiber, the 106-micron emission is reduced through careful fiber design optimization.
An associated double clad passive fiber as well as a fiber combiner are available to speed-up the integration of this fiber in lab experiments.
More info: Nd Double Clad Doped Fibers