40G BiDi QSFP+ 150m MMF Transceiver: BIDI-40G-QSFP-150

The EdgeOptic BIDI-40G-QSFP-150 is a 40G BiDi QSFP+ transceiver for 40 Gigabit Ethernet over multimode fiber. Bidirectional transmission carries both directions of traffic on a single duplex fiber pair, so the link uses two fibers instead of the eight fibers a 40GBASE-SR4 parallel optics deployment requires. The module transmits and receives on dual wavelengths, 850nm and 900nm, supporting data rates up to 41.25 Gbps. It pairs VCSEL transmitters with PIN photodiode receivers and terminates in a duplex LC/UPC connector for OM3, OM4, and OM5 multimode fiber.

The link carries a 2 dB average optical link budget, which sets the maximum reach. Over OM4 or OM5 multimode fiber, the module is rated to 150 meters; over OM3 fiber, reach is approximately 100 meters. These reach figures are the module's fiber-grade ratings for OM4/OM5 and OM3 multimode fiber. Actual reach depends on connector loss and cable condition in the deployed plant.

The BIDI-40G-QSFP-150 ships in a hot pluggable QSFP+ form factor with a duplex LC/UPC connector, cutting fiber count by 75 percent compared with 40GBASE-SR4's eight fiber MPO cabling. Each of the two fibers carries traffic bidirectionally: one wavelength (850 nm) travels one direction and the other (900 nm) travels the reverse direction on the same strand, with the wavelength separation isolating the two directions. The electrical interface follows the INF-8438i and SFF-8436 specifications and the QSFP+ MSA, which keeps the module interoperable with standard QSFP+ host cages across vendor equipment.

DDM/DOM reports transmitted and received optical power per wavelength, module temperature, laser bias current, and supply voltage in real time through the QSFP+ MSA EEPROM interface, so link health can be checked without pulling the module. Because the BiDi design needs only two fibers, it is a practical way to add 40G capacity in fiber constrained plant where a parallel optics upgrade would mean new cabling. The module runs on a single +3.3V supply across a 0 to 70°C operating range, with -40 to 85°C storage and 5 to 85% humidity tolerance.

Standards support spans an IEEE 802.3ba 40 Gigabit Ethernet electrical and host interface, OTU3 and OTU3e2 for Optical Transport Network applications at 43.01 and 44.58 Gbps, and STM-256 for SDH/SONET applications at 39.81 Gbps, so the same hardware serves Ethernet, OTN, and SDH/SONET links; the bidirectional optical scheme itself is a de-facto industry multimode fiber convention layered on that electrical interface, not a separate IEEE optical PMD. QSFP+ MSA compliance supports multi vendor interoperability, though some host platforms apply their own module authentication and may need vendor specific EEPROM programming. The BIDI-40G-QSFP-150 is CE and RoHS certified and meets Class 1 laser safety under FDA and IEC 60825-1.

Typical uses include fiber constrained data centers, legacy multimode upgrades, high density switching, and patch panel layouts that benefit from fewer fiber runs. The duplex LC/UPC interface and bidirectional wavelength plan let a 40G upgrade reuse existing two fiber runs instead of adding cabling for parallel optics.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms, the BIDI-40G-QSFP-150 ships next business day from EU stock with a lifetime warranty. For project quantity pricing, contact our sales team.