915 nm 300 W High-Power Fiber-Coupled Laser Diode

The K915-A0-300.0W-20022-S is a high-power fiber-coupled laser diode delivering 300W of Continuous Wave (CW) output power at a center wavelength of 915nm (±10nm). Designed for high-power fiber laser pumping, this module targets the 915nm absorption band of Ytterbium-doped gain fiber — a broad, thermally stable pump band that provides robust operation in demanding industrial and scientific fiber laser architectures where spectral stability under thermal load is critical.A unique optical parameter on this module is the dual-NA brightness specification: the datasheet guarantees that ≥90% of the output power (minimum) and ≥95% (typical) is encircled within the 0.17 NA beam cone, while the full aperture is 0.22 NA. This dual-NA brightness certification means the module is qualified not just for 0.22 NA double-clad fiber coupling, but also for high-brightness applications requiring tighter beam confinement in 0.17 NA or smaller clad fiber combiner ports, a distinction not found on lower-power 915nm modules.With a 200μm core fiber (0.22 NA), FF (flat-face, bare-end) termination, 88mm minimum bending radius, and 2-meter pigtail in 0.9mm loose tubing, the K915-A0-300.0W-20022-S delivers 300W at 50% efficiency and a typical operating voltage of 22.4V. The 30dB feedback isolation band (1020–1200nm) protects the diode from back-reflected Yb laser signal light, and the wide 15–35°C case temperature range ensures compatibility with standard water-cooled OEM mounts and industrial pump laser platforms.