Fiber pump signal combiner couple the power from multimode (MM) pump sources to the first cladding of a double clad fiber with a signal propagating through the core of that single mode fiber . The fused fiber construction of these combiners is essential for the power handling needs of industrial, defense, medical, and telecom applications. A compact high-power housing is offered to enable optimal heat transfer and up to 50 W of power in each pump port. Employing a unique fiber fusing process, Laser Space is able to fabricate and offer a wide variety of fused fiber combiner with different product requirements (fiber types, operating wavelengths, handling power, connector types, package sizes, etc.).