100G BiDi QSFP28 LR1 10km Transceiver (Side B): BIDI-100G-Q28-SL10B

The BIDI-100G-Q28-SL10B is the Side B half of a matched 100G BiDi QSFP28 LR1 pair for 10km single-mode fiber links. It carries the 100G Ethernet signal both directions over one fiber strand instead of a duplex pair, which generally lowers the fiber a link needs. This module transmits at 1331nm and receives at 1271nm, a wavelength plan specific to this design rather than one industry-wide BiDi standard, and it must pair with a Side A module using the complementary 1271nm/1331nm wavelengths.

Built in the QSFP28 form factor, the module uses PAM4 modulation to reach 106.25 Gbps over single-mode fiber through one LC/UPC simplex connector, with a 6.1dB link budget over 10km. Transmit centers at 1331nm with 13nm of wave bandwidth and -1.4 to 4.5 dBm launch power per lane; receive centers at 1271nm with 13nm of wave bandwidth, -7.5 to 4.5 dBm receiver sensitivity per lane, and a 5.5dBm receiver overload point.

The transmitter is an EML laser and the receiver uses a PIN photodiode. FEC runs integrated in the module's DSP, and CDR is supported on both transmit and receive paths. DDM and DOM reporting are supported, giving visibility into per-lane optical power and operating conditions.

The module meets IEEE 802.3cd for the CAUI-4 electrical host interface and conforms to the SFF-8679 QSFP28 mechanical and electrical MSA. It carries CE and RoHS marks. IEEE 802.3cd defines the electrical interface scope only; it does not define the 1331nm/1271nm BiDi wavelength plan used on this module.

This Side B module only works when a Side A module (BIDI-100G-Q28-SL10A) terminates the opposite end of the fiber. Side B transmits at 1331nm and receives at 1271nm; Side A transmits at 1271nm and receives at 1331nm. Each receiver expects the wavelength the opposite end transmits, so two Side B modules on the same span leave both receivers listening for a wavelength that is not being sent, and the link will not come up.

Operating temperature is rated 0 to 70C, with storage from -40 to 85C and relative humidity from 5 to 85 percent. Power draw is bounded at 4.5W maximum, drawn from a single 3.3V supply rail, in line with standard QSFP28 power budgets.

Third-party optic acceptance policy varies by vendor and firmware; verify the specific host platform and OS release against its transceiver compatibility list before deployment.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms, this transceiver ships next business day from EU stock with a lifetime warranty. For project-quantity pricing, the matching Side A module, or platform-specific deployment questions, contact our sales team.