The 976 nm 140 W Wavelength-Stabilized Fiber Coupled Diode Laser is an ultra-high-brightness pump source engineered for the most demanding fiber laser and scientific applications. By utilizing integrated Volume Bragg Grating (VBG) technology, this module achieves a precise 976 nm ± 1 nm center wavelength with a narrowed spectral width, ensuring maximum absorption efficiency in Ytterbium-doped gain media. Delivering a massive 140 W output through a high-precision 105 µm core fiber, the K976BN1RN series provides exceptional brightness and beam quality. For absolute reliability in high-power systems, it features integrated 30 dB feedback isolation to protect the diode from back-reflections in the 1020 nm–1200 nm range. With an industry-leading 50% electrical-to-optical efficiency and a rugged industrial package, this module is the definitive choice for kilowatt-class fiber laser pumping and advanced materials processing.