The guide of BiDi Optical Transceiver
BiDi SFP Transceiver
BIDI SFP transceiver module is specifically used for the high-performance integrated duplex data link over a single optical fiber. These transceiver modules are compliant with the SFP Multi-source Agreement (MSA). With the hot pluggability, these modules offer an easy way to be installed into SFP MSA compliant ports at any time without the interruption of the host equipment operating online.
BIDI SFP transceiver module using a long wavelength DFB laser diode enables data transmission up to 80km on a single mode optical fiber. BiDi SFP can be produced either with SC or LC simplex port, that is used both transmission and receiving. The transmitter incorporates a highly reliable 1310nm or 1550nm Laser (FP laser for narrow, Intermediate distance and DFB laser for long distance) and a driver circuit which converts data to light with APC function.
QSFP BiDi Transceiver
40G QSFP BiDi transceiver has two 20-Gbqs channels, each transmitted and received simultaneously on two wavelength over a single MMF strand (OM3 or OM4). It allows the existing cabling system including the patch cables, patch panels with MTP/MPO LC modules, and fiber trunks to be repurposed for 40-Gbqs connectivity. In contrast, the common QSFP SR4 transceiver like Cisco QSFP-40G-SR4 requires new patch cables and patch panels because the connector types differ and the size of the fiber trunk needs to be quadrupled.
Cisco recently announced its QSFP 40G BiDi transceiver with duplex LC ports, enabling 100 meters of 40G transmission over OM3, 125 meters over OM4 fiber, and 150 meters over certain OM4+ fibers. QSFP-40G-SR-BD transmits full-duplex 40-Gbps traffic over one dual-fiber LC-connector OM3 or OM4 MMF cable. It provides the capability to reuse 10-Gbps fiber infrastructure. In other words, it enables data center operators to upgrade to 40-Gbps connectivity without making any changes to the previous 10-Gbps fiber cable plant.
How BiDi Transceivers Work
The most obvious difference between BiDi transceivers and traditional transceivers is that BiDi transceivers are fitted with WDM couplers, which combine and separate data transmitted over a single fiber based on the wavelengths of the light. The figure below depicts the details of how BiDi transceivers work. The two wavelengths that have been used in this example are 1310nm and 1490nm. Usually the upstream transmits at the shorter wavelength, while the downstream the longer wavelength.
Note that BiDi transceivers must be deployed in pairs, with their diplexers tuned to match the expected wavelength of the transmitter and receiver that they will be transmitting data from or to.
BIDI SFP transceiver module is specifically used for the high-performance integrated duplex data link over a single optical fiber. These transceiver modules are compliant with the SFP Multi-source Agreement (MSA). With the hot pluggability, these modules offer an easy way to be installed into SFP MSA compliant ports at any time without the interruption of the host equipment operating online.
BIDI SFP transceiver module using a long wavelength DFB laser diode enables data transmission up to 80km on a single mode optical fiber. BiDi SFP can be produced either with SC or LC simplex port, that is used both transmission and receiving. The transmitter incorporates a highly reliable 1310nm or 1550nm Laser (FP laser for narrow, Intermediate distance and DFB laser for long distance) and a driver circuit which converts data to light with APC function.
QSFP BiDi Transceiver
40G QSFP BiDi transceiver has two 20-Gbqs channels, each transmitted and received simultaneously on two wavelength over a single MMF strand (OM3 or OM4). It allows the existing cabling system including the patch cables, patch panels with MTP/MPO LC modules, and fiber trunks to be repurposed for 40-Gbqs connectivity. In contrast, the common QSFP SR4 transceiver like Cisco QSFP-40G-SR4 requires new patch cables and patch panels because the connector types differ and the size of the fiber trunk needs to be quadrupled.
Cisco recently announced its QSFP 40G BiDi transceiver with duplex LC ports, enabling 100 meters of 40G transmission over OM3, 125 meters over OM4 fiber, and 150 meters over certain OM4+ fibers. QSFP-40G-SR-BD transmits full-duplex 40-Gbps traffic over one dual-fiber LC-connector OM3 or OM4 MMF cable. It provides the capability to reuse 10-Gbps fiber infrastructure. In other words, it enables data center operators to upgrade to 40-Gbps connectivity without making any changes to the previous 10-Gbps fiber cable plant.
How BiDi Transceivers Work
The most obvious difference between BiDi transceivers and traditional transceivers is that BiDi transceivers are fitted with WDM couplers, which combine and separate data transmitted over a single fiber based on the wavelengths of the light. The figure below depicts the details of how BiDi transceivers work. The two wavelengths that have been used in this example are 1310nm and 1490nm. Usually the upstream transmits at the shorter wavelength, while the downstream the longer wavelength.
Note that BiDi transceivers must be deployed in pairs, with their diplexers tuned to match the expected wavelength of the transmitter and receiver that they will be transmitting data from or to.
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