The BiDi transceiver, or the bidirectional optical transceiver, is designed with the bidirectional transmission technology WDM (Wavelength Division Multiplexing) so you can obtain the transmission of optical channels on a fiber that propagates simultaneously in both directions.
In recent years we are seeing an exponential bandwidth demand for end users. The development of network architectures such as FTTx has given a significant boost to the development of technologies to increase throughput and rationalize links.
Bi-directional optics involve the use of single-mode fiber where the tx will be modulated with one frequency and the rx with another. Typically the frequencies are:
TX Wavelength: 1510nm
RX Wavelenght: 1310nm