100G SR-BiDi QSFP28 150m Duplex LC MMF Transceiver: BIDI-100G-QSFP28-150

The EDGEOPTIC BIDI-100G-QSFP28-150 is a 100G SR-BiDi QSFP28 bidirectional optical module compatible with multiple vendor platforms. It carries full-duplex 100 Gigabit Ethernet over two multimode fiber strands terminated in a duplex LC connector. Each fiber runs a 50G PAM4 lane in both directions using wavelength division, so two fibers carry the full 100G link at the standard 100G Ethernet line rate of 103.125 Gbps. That cuts fiber count to two strands instead of the eight an MPO-based SR4 link needs.

The module carries two 50G PAM4 lanes, one at 850 nm and one at 900 nm, with one lane on each strand of the duplex LC pair. The transmitter section uses a VCSEL (Vertical-Cavity Surface-Emitting Laser) array and the receiver section uses a wideband PIN photodiode array that covers the full 832 to 918 nm range. This BiDi architecture saves fiber where multimode count is limited or costly to expand, and it stays backward compatible with 40G QSFP BiDi deployments.

The average optical link budget is 1.9 dB. In 100G mode the transceiver reaches 150 meters over OM5, 100 meters over OM4, and 70 meters over OM3 multimode fiber. Distance is an indicative parameter; actual reach depends on the link budget and the average attenuation of the deployed fiber plant. The duplex LC interface simplifies cabling compared to MPO-based parallel solutions and reuses standard two-strand MMF patch cords.

The module is a hot-pluggable QSFP28 with a duplex LC/UPC optical interface. The electrical interface conforms to SFF-8636 and SFF-8419 MSA specifications, ensuring compatibility with standard QSFP28 host systems across multiple vendor platforms. The transceiver can be encoded with multiple vendor codes to match the host system in use.

DDM/DOM (Digital Diagnostic Monitoring) provides real-time readings of transmitted and received optical power, module temperature, bias current, and supply voltage. The module supports host-side FEC (Forward Error Correction) for bit-error detection and correction, improving link quality. The operating temperature range is 0 to 70°C, with maximum power consumption of 3.5 W on a +3.3 V supply.

The optical interface follows the 100GBASE SR-BiDi vendor specification and the QSFP28 MSA (SFF-8636); SR-BiDi is not an IEEE-standardized PMD, so it is not defined by IEEE 802.3bm. The CAUI-4 host electrical interface (four 25G NRZ lanes) does follow IEEE 802.3bm. The module supports dual-rate operation at 100G Ethernet (103.125 Gbps) and 40G Ethernet (41.25 Gbps) for mixed-speed deployments. It is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards.

Important: The same 100G SR-BiDi module is used at both ends of the link. Its wideband receiver covers the full 832 to 918 nm range, and because standard duplex LC patch cords cross transmit and receive, the 850 nm and 900 nm lanes line up automatically. No separate or complementary far-end module is required.

Common applications include data center environments with limited fiber availability, capacity upgrades without new fiber installation, and deployments where existing duplex LC MMF cabling is reused instead of moving to MPO-based parallel optics. The SWDM4 sibling targets the same 150m OM5 reach class over the same duplex LC fiber pair but uses four NRZ wavelengths rather than two PAM4 BiDi wavelengths.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Made to order with a 2-week lead time and a lifetime warranty included.