Optical fused couplers are special components used to join two optical fibers together, allowing for the transfer of data. Thorlabs offers a varied selection of single mode (SM), polarization-maintaining (PM), multimode (MM), and double-clad fiber couplers, as well as 1x8 and 1x16 SM PLC splitters; 1x4, 1x8, and 1x16 PM PLC splitters; wideband multimode circulators; RGB combiners; and WDMs. Our SM and double-clad fiber. The FuseLite® Splice-On Connector enables fast, reliable fusion splicing connectivity for local area networks and offers flexibility for repairs and restoration of connectivity. In this blog post, we will discuss how these devices work and their various benefits. such as 50/50 if the split is even, or 80/20 if 80% of the signal goes to one side and only 20%.