Fiber Coupler, Optical Isolator, Optical Fiber Wdm manufacturer / supplier in China, offering 1064nm High Power Bias Preserving Filtered Coupler (up to 20W) 1X2, 850nm High Power Bias Preserving Filtered Coupler (up to 20W) 1X2, 980nm High Power Bias Preserving Filtered Coupler (up to 20W) 1X2 and so on.