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Contrarily to regular transceivers that need dual optical fibres for full-duplex transmission, BiDis -bidirectional transceivers- enable full-duplex via a single optical fibre. BiDi transceivers have a simplex port for transmitting and receiving, while common transceivers have duplex ports, dedicating one to each, transmitting and receiving.
BiDis achieve a two-way communication over one simplex fibre by using an integrated diplexer (WDM) filter. Optical signals will be transmitted at a specific wavelength and received at a different one. In our example below, one side (Transceiver A) transmits signals at a wavelength of 1310nm and receives signals at 1490nm. The other side (Transceiver B) must therefore transmit at 1490nm and receive signals at 1310nm correspondingly. For this reason, BiDis always have to be used in pairs, commonly marked as “U” (Upstream) and “D” (Downstream), where upstream transmits the shorter wavelength and downstream the longer.
While common duplex transceivers have two ports, one for transmitting (Tx) using a TOSA (Transmitter Optical Sub-Assembly) and one for receiving (Rx) using a ROSA (Receiver Optical Sub-Assembly), BiDis combine those functions in a single Tx/Rx-port, using a BOSA (Bidirectional Optical Sub-Assembly).
REGULAR DUPLEX TRANSCEIVER
BIDIRECTIONAL TRANSCEIVER
BiDi transceivers are an ideal and economic solution in situations, where only limited fibres or conduit space is available. The deployment of bidirectional transceivers efficiently enhances the bandwidth capacity of an existing optical fibre plant and helps to achieve a more economic and reliable performance of your network. Solutions are available for 1G, 10G, 25G, 40G and 100G connection speeds.
Unsure, if your network could profit from the deployment of BiDi transceivers? Contact us today to find out how SPEEDDY products can help you to make the most of your existing infrastructure, all while maintaining highest levels of quality and reliability of your network’s performance.
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