Custom 100G QSFP28 BiDi Optical Transceiver

Product Description

Exhausted dark fiber resources dictate the use of bidirectional optical architecture. Instead of the standard duplex Tx/Rx methodology, the 100G QSFP28 BiDi transceiver houses specialized optical filters to push PAM4 modulated traffic through a Simplex LC port. These units must be deployed in mirrored pairs to function. By integrating advanced digital equalization, WolonFiber ensures the signal remains coherent across stretches up to 80km, providing an immediate capacity multiplier for constrained fiber routes.

Key Features

• Matched A/B Configuration: Modules are calibrated in inverted sequences (e.g., Site A transmits at 1271nm; Site B receives at 1271nm and transmits at 1331nm).

• Dispersion Mitigation: Internal Digital Signal Processors reconstruct signal degradation caused by chromatic dispersion on lengthy simplex runs.

• Vendor-Specific Provisioning: The MSA memory map is flashed to align with proprietary edge router operating systems, preventing hardware rejection.

Application Scenarios

• Data Center Interconnects (DCI) strictly limited by single-strand fiber leasing contracts.

• Metropolitan aggregation rings demanding immediate bandwidth expansion without the capital expense of new trenching.

Technical Specifications

Engineering FAQs

• Q: Are distinct part numbers required for a single link?

  A: Yes. BiDi systems are asymmetrical. If the upstream switch uses the 1271nm-TX variant, the downstream switch must be populated with the 1331nm-TX variant to establish the link.

• Q: Why does the 80km variant list a 5.5W power draw?

  A: Pushing 100G over an 80km simplex link necessitates an Avalanche Photodiode (APD), active TEC laser cooling, and potentially a pre-amplifier. This hardware demands a Class 6 power allowance from the host switch slot.

• Q: Is interoperability guaranteed with other BiDi manufacturers?

  A: Only if the third-party transceiver matches the exact wavelength grid, PAM4 modulation scheme, and host FEC configuration.

• Q: What polish type is required on the Simplex LC patch cord?

  A: Standard 10km models accept UPC polish. However, 80km variants may mandate APC (Angled Physical Contact) to suppress return loss. Always verify the specific WolonFiber datasheet for the chosen distance.