532nm/633nm Polarization Beam Splitter/Combiner from Simtrum is designed for optical applications, offering low insertion loss, high return loss, and high extinction ratio for reliable and stable performance. It's suitable for fiber optical current transducers, fiber sensors . Thorlabs offers a wide range of narrowband and wideband Single Mode 2x2 Fiber Optic Couplers, also known as taps, as highlighted in Table 1. 2x2 couplers are bidirectional, allowing any port to be used as an input (refer to the 2x2 Coupling Examples tab). These devices operate entirely with fiber; polarization states are combined or. The Polarization Beam Splitter is a device with compact size, which combines two polarization signals into one output fiber.