In the rapid expansion of 5G fronthaul and high-bitrate video contribution networks, the 100G interface has become the de facto standard. However, choosing the wrong optical form factor can lead to stranded assets and spiraling infrastructure costs. While the industry has long relied on dual-fiber solutions, the 100G BIDI QSFP28 10km is fundamentally reshaping the ROI of metropolitan fiber rings.
To understand the engineering value of the QSFP28 100G BIDI 10km, we must compare it against the incumbents: 100G-LR4 (the distance king) and 100G-CWDM4 (the data center favorite). In a 10km "Campus-to-Campus" or "Studio-to-Hub" scenario, the BIDI module offers a unique profile of efficiency.
| Metric | 100G BIDI 10km | 100G LR4 | 100G CWDM4 |
|---|---|---|---|
| Fiber Strand(s) | 1 (Simplex LC) | 2 (Duplex LC) | 2 (Duplex LC) |
| Optical Budget | 6.3 dB | 6.3 dB | 5.0 dB |
| Max Distance | 10km | 10km | 2km |
| Modulation | PAM4 | NRZ | PAM4 |
| Fiber Cost ROI | High (100% Saving) | Low | Medium |
"Engineers often overlook the cumulative loss of patch panels. While LR4 and BIDI share a 6.3dB budget, the BIDI's use of a single LC connector reduces potential failure points by 50% across the entire link path."
The core innovation in the 100G BIDI 10km is its wavelength separation. By using 1271nm-TX/1331nm-RX (and vice-versa), Univiso modules avoid the crosstalk issues common in older bidirectional technologies. However, deploying these links requires strict adherence to U/D (Upstream/Downstream) pairing conventions—a small operational trade-off for doubling your fiber capacity.
Leased Fiber Scenarios: When you are paying a monthly fee per fiber strand, BIDI pays for itself in under 3 months.
Port-Starved Hubs: When your patch panels are at 95% capacity and you cannot install more trays.
8K Live Production: When you need uncompressed 100G throughput but are limited to a single tactical fiber cable in the field.
Compatibility remains a top-tier concern for network architects. Univiso’s 100G BIDI solution is engineered to be platform-agnostic, supporting the CAUI-4 electrical interface standard. This ensures that whether you are running Arista, Cisco, or Juniper, the switch perceives the module as a standard 100G port, while the underlying WDM technology handles the heavy lifting of single-strand transmission.
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