The main difference between an optical adapter and an optical coupler is the type of connector at both ends.
Generally, if the two cables to be connected have the same type of connector, they are called optical fiber couplers. If the two cables to be connected have different connectors, they are called optical fiber adapters.
For example, the optical fiber adapter is used to connect the ST-ST connector. At this time, the connectors at both ends of the optical fiber adapter are the same, so it can be called the optical fiber coupler. Otherwise, it is called an optical adapter. However, there are 12 types of optical fiber adapters available to connect the same interface and different interfaces. Therefore, when selecting, we should distinguish the coupler from the adapter to find a suitable optical fiber product.
