This fiber-coupled Beam Splitter 1 ⇾ 2 is a compact opto-mechanical unit that splits a fiber-coupled source into 2 output fiber cables with a fixed splitting ratio and a high efficiency. The input port is fiber-coupled to a PM fiber cable. The radiation is split using a beam splitter. Beamsplitters are optical components used to split input light into two separate parts. Beamsplitters are also ideal for fluorescence applications, optical interferometry, or life science or semiconductor instrumentation. a laser beam) into two (or sometimes more) beams, which may or may not have the same optical power (radiant flux). Each beam has > 40 % of total input power.