The HPFC Series fiber optic coupler is fully tested and burned in at the specified high power for quality control. 2×2 can be used as 1×2 in which the reflected optical power is safely guided out through the extra fiber. An angle termination is required to avoid back reflection. The coupler is based on our fused biconical taper technology and compact packaging structure. It features good uniformity, low excess loss, and very low polarization sensitivity. The device is ideal for splitting or combining light with exceptional performance over a wide wavelength range.