Coherent Extra Large Mode Area (XLMA) ytterbium-doped fibers are designed to support applications which require high average and peak powers as well has high pulse energies. These large core size fibers offer high cladding absorptions and high thresholds for non-linear effects. The fibers have a numerical aperture of 0.10 and core diameters of 100 or 300 µm, providing fundamental mode areas of 60 mm and 200 mm, respectively. The highly multimode output enables low spatial coherence for speckle free, full-field imaging. With the broad gain bandwidth of ytterbium, the XLMA fibers enable broadband, low temporal coherence operation for a range of applications such as optical coherence tomography and frequency resolved LIDAR. The XLMA fibers are offered in triple clad geometry to facilitate high power handling in multi-kW continuous wave lasers and high average power pulsed amplifiers with tens of mJ pulse energies. The fibers have NuCOATFA coating and the mechanical and optical reliability typical of Coherent double clad fibers.