Our BiDi SFP Product
The BiDi SFP transceiver is designed as a compact optical transceiver module which utilises WDM (wavelength division multiplexing) technology, and complies with the SFP multi-source agreement (MSA). Conceived for high performance integrated duplex data link over a single optical fiber, the BiDi SFP interfaces a network device mother board (say for a switch, router or similar device) to a fiber optic or unshielded twisted pair networking cable. In our modern environment, it is one of the most popular industry formats and is in-turn supported by many fiber optic component suppliers around the world.
For a comparison with the traditional SFP transceiver, the BiDi SFP are uniquely deployed in matched pairs. One for the upstream (“U”) direction, while the other is for the downstream (“D”), and each part is transmitting at differing wavelengths.
Highlighting the Main Differences Between BiDi SFP and Traditional SFP
To showcase the main difference between BiDi SFP and traditional 2-fiber SFP transceiver, it can be noted that the BiDi SFP is fitted with wavelength division multiplexing (WDM) couplers, also known as a diplexer, which combines and separates data transmitted over a single fiber based on the wavelengths of the light. This is the key reason the BiDi SFP module has only one port, and a traditional SFP module can usually be found with 2 individual ports. One of them is TX acting as the transmitting port, and the other is RX which acts as the receiving port.
Another key difference to note between a common SFP and BiDi SFP are the optical sub-assemblies, major cost components of a fiber optic transceiver. In a typical setup, a common SFP usually has 2 optical sub-assemblies — the transmitter optical sub-assembly (TOSA) and also the receiver optical sub-assembly (ROSA). However, the BiDi SFP only has 1 optical sub-assembly — BOSA (bi-directional optical sub-assembly), which serves the roles of TOSA and ROSA, but with differing working principles.