The WDM or BIDI small form-factor pluggable (SFP) is a compact optical transceiver, module used in optical communications for both telecommunication and data bidirectional communications applications. It interfaces a network device mother board (for a switch, router or similar device) to a fiber optic or unshielded twisted pair networking cable. It is a popular industry format supported by several fiber optic component vendors. BIDI 1G optics are a small form factor pluggable module for Single Mode Fast Ethernet, Gigabit, Fiber Channel, SDH/SONET applications. In the industry there are several synonyms for Bidi optics, such as: Bi-directional optics, BX-D / BX-U, WDM, Single Fiber and so on. Specifically, the SFP-1G-BX-D and SFP-1G-BX-U for the 1G. BIDI SFP can be produced either with SC or LC simplex port, that is used both transmission and receiving. The most typical wavelength combination is 1310/1490, 1310/1550, 1490/1550 and 1510/1570. For a link you need 2 different optics, one that sends 1310nm and receives 1550nm and the other side of the fiber, which has a Bidi optic which sends 1550nm and receives 1310nm. In most cases these wavelengths are mentioned as Tx (transmitting) and Rx (receiving) on the label of the optic.
|BIDI SFP SDH/SONET||BIDI SFP 100M/1G||BIDI SFP 4G|
|Fiber Type||SMF or MMF||SMF or MMF||SMF or MMF|
|Data Rate Range||Up to 2.67Gbps||up to 1.25G||4.25Gbps|
|Wavelength||1310 nm to 1550 nm||1310 nm to 1550 nm||1310 nm to 1550 nm|
|Distance||Up to 80km or up to 35dB||Up to 60km or up to 36dB||Up to 40km or up to 24dB|
|Case Temperature range||Com./Ind.||Com./Ind.||Com./Ind.|
*- For more specific information for each module of these types, look in added catalog.