An optical coupler helps split or join light signals in a fiber network. You can also use them to join light from. These devices are used to divide, route or combine multiple optical signals. Here, in this blog, we are going to discuss these devices in detail and know why some optical couplers are often called optical. When using fiber optics, one often needs to use fiber couplers for various purposes. However, choosing the right splitter type and splitting ratio is crucial to optimizing the performance of communication networks. This capability is fundamental.