This fiber-coupled Beam Splitter 1 ⇾ 2, dichroic is a compact opto-mechanical unit that splits a fiber-coupled broadband source or two superimposed narrow-band sources into 2 wavelength ranges. These two wavelength ranges then are coupled into a output fiber cable, respectively, with high efficiency.
The input port is fiber-coupled to a PM fiber cable, or SM fiber cable.
The radiation is split using a dichroic beam splitter (long pass or short pass).
A fundamental component of fiber-coupled Beam Splitters are the Laser Beam Couplers, which are the inputs into the opto-mechanical unit collimating the input radiation and, finally, couple the radiation back into the common polarization-maintaining fiber cable. The stability of the total Beam Splitter is determined by the stability of the Laser Beam Coupler.