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| Property | Parameter | Description |
|---|---|---|
| Product Name | G.654D Large Mode Field Diameter Cutoff-Wavelength-Shifted Single-Mode Optical Fiber | Ultra-low loss, large effective area single-mode fiber optimized for long-haul and submarine transmission |
| Fiber Category | ITU-T G.654.D | Cutoff-wavelength-shifted single-mode optical fiber; equivalent to IEC 60793-2-55 Type B1.3 |
| Standard Compliance | ITU-T G.654.D / IEC 60793-2-55 / TIA-492CAAB | Compliant with international optical fiber standards for submarine and terrestrial long-haul networks |
| Core Material | Pure Silica Core (PSC) | High-purity silica glass core with fluorine-doped silica cladding for ultra-low attenuation |
| Mode Field Diameter (MFD) | 12.0 µm ± 0.6 µm @ 1550 nm | Large MFD reduces nonlinear effects; per ITU-T G.654.D specification |
| Cladding Diameter | 125.0 µm ± 0.7 µm | Standard 125 µm cladding for compatibility with standard connectors and splicing equipment |
| Coating Diameter | 245 µm ± 5 µm (dual-layer acrylate) | Dual-layer UV-cured acrylate coating for mechanical protection and ease of stripping |
| Cutoff Wavelength (λcc) | ≤ 1530 nm (cable cutoff) | Ensures single-mode operation throughout the C+L band; shifted below 1530 nm per G.654.D |
| Attenuation Coefficient | ≤ 0.170 dB/km @ 1550 nm; ≤ 0.190 dB/km @ 1310 nm | Ultra-low attenuation enabling extended repeater spacing in submarine and terrestrial systems |
| Chromatic Dispersion | 17 to 22 ps/(nm·km) @ 1550 nm | Positive dispersion in C-band; zero dispersion wavelength (λ0) in range 1300–1324 nm |
| Polarization Mode Dispersion (PMD) | ≤ 0.04 ps/√km (link design value) | Extremely low PMD for high-speed coherent transmission at 100G/400G and beyond |
| Effective Area (Aeff) | ≥ 110 µm² @ 1550 nm | Large effective area minimizes nonlinear impairments (SBS, SPM, XPM) in high-power DWDM systems |
| Operating Temperature | -60°C to +85°C | Suitable for harsh environments including submarine, aerial, and direct-buried installations |
| Application | Submarine cables, long-haul terrestrial DWDM, transoceanic networks, 100G/400G/800G coherent systems | Ideal for amplified systems with EDFA/Raman amplification requiring low loss and low nonlinearity |
| Certification | RoHS, REACH, UL, TÜV, ISO 9001:2015 | Environmentally compliant; manufactured under certified quality management systems |
| Packaging | Wooden reel or plastic bobbin; standard lengths 4.0 km, 6.25 km, 8.0 km per reel | Custom reel lengths available; moisture-proof packaging for long-distance shipping |
| MOQ | 50 km (≈ 8 reels) | Minimum order quantity for standard production runs; OEM and custom specifications negotiable |
Initial reel labeling issue—resolved promptly by supplier
Our 300 km order of G.654D fiber arrived with inconsistent reel length labeling: three reels showed discrepancies between the printed label and the actual measured length, complicating our splicing schedule. We raised the issue immediately and the supplier's support team responded within 4 hours, issued corrected documentation, and offered partial credit for the scheduling disruption. Fiber optical performance itself was fine—attenuation at 1550 nm and effective area ≥125 μm² both met ITU-T G.654D spec on OTDR verification. Issue is resolved; we're cautiously planning a follow-up order.
Our 300 km order of G.654D fiber arrived with inconsistent reel length labeling: three reels showed discrepancies between the printed label and the actual measured length, complicating our splicing schedule. We raised the issue immediately and the supplier's support team responded within 4 hours, issued corrected documentation, and offered partial credit for the scheduling disruption. Fiber optical performance itself was fine—attenuation at 1550 nm and effective area ≥125 μm² both met ITU-T G.654D spec on OTDR verification. Issue is resolved; we're cautiously planning a follow-up order.
