Corning TXF Bare Optical Fiber
TXF is Corning's longest-reach terrestrial-grade fiber, built to ITU-T G.654.E with ultra-low attenuation and a large effective area. It is designed for extended-reach coherent DWDM links at 100 Gb/s and above where both span loss and nonlinear noise set the amplifier spacing.
- ITU-T standard
- G.654.E
- Attenuation @ 1550 nm
- ≤ 0.157 dB/km
- Effective area (Aeff)
- ~125 µm²
- Mode field diameter
- ~12.5 µm @ 1550 nm
Attenuation is 0.157 dB/km or below at 1550 nm — among the lowest available in a commercial terrestrial fiber. Effective area is approximately 125 µm², which is substantially larger than the 80 µm² of standard G.654.C fibers like SMF-28 ULL. The large effective area reduces optical nonlinear effects (four-wave mixing, cross-phase modulation, stimulated Raman scattering) that degrade DWDM channel quality at high per-channel power levels.
The combination of low attenuation and large effective area increases the maximum amplifier spacing on a high-capacity DWDM route. On a 5000 km terrestrial backbone designed for 400G coherent channels, TXF can reduce the required number of inline amplifier sites by 15-25 percent compared to standard G.654.C fiber. Each amplifier site eliminated removes optical amplifiers, power systems, shelter, maintenance, and right-of-way costs.
TXF is the right choice for national backbone infrastructure where long-term capacity expansion is planned and the capital cost of fiber per route kilometer is justified by the reduction in active equipment. It is not a cost-effective choice for metro or regional builds where the spans are short and nonlinear effects are not the system limit.
Specifications
| ITU-T standard | G.654.E |
|---|---|
| Attenuation @ 1550 nm | ≤ 0.157 dB/km |
| Effective area (Aeff) | ~125 µm² |
| Mode field diameter | ~12.5 µm @ 1550 nm |
| PMD coefficient | ≤ 0.04 ps/√km |
| Cable cutoff | ≤ 1530 nm |
Typical Applications
- National backbone DWDM routes at 100G, 400G, and 800G
- Long-haul infrastructure where amplifier count is the capital cost driver
- Extended unrepeatered spans in terrestrial high-capacity networks
Why Order Corning Fiber from Aumictech?
We source directly from the Corning authorized channel. Every spool ships with documentation, including reel ID and fiber code.
0.5 km to 1,000 km on a single order. Mix lengths across spools. Choose FC, SC, or LC connectors per spool end, or leave ends bare.
Certificate of compliance and OTDR test data available on request. Required for carrier acceptance testing and network documentation.
Continental US next-day and two-day air available. International shipping on request. Most orders confirmed within one business day.
Frequently Asked Questions
How does TXF compare to SMF-28 ULL for long-haul routes?
TXF has lower attenuation (0.157 vs 0.165 dB/km) and larger effective area (~125 vs ~80 µm²). The attenuation difference is 5 percent, which adds up over hundreds of kilometers. The larger Aeff is more significant: it allows higher launch power before nonlinear impairments dominate, which is the primary limit on coherent 400G and 800G system reach. TXF is the right choice when maximizing span distance between amplifier sites on high-capacity routes.