Active (2+1)×1 Combiner(x/125,x/250 Signal、x/125,x/250 Out)

The active pump combiner was build by couple pump fiber power directly into doped fiber (say Yb-doped, or Er-dope etc.), the signal input fiber is passive fiber, the splice point was put inside combiner. Normally customer splice doped fiber with combiner output passive fiber, which will cause backward scattering. Active combiner makes customer no need to splice again outside combiner and will get very good isolation between backward light and seed laser.