Fiber Loss Budget Calculator
Calculate optical fiber link loss budgets using ITU-T G.652.D, G.657.A1/A2, and G.651.1 standards. Determine the total passive loss in your fiber optic link for system design.
Link Parameters
Include all connectors in the link (typically 2-4)
Fusion or mechanical splices in the link
Calculation Results
Enter all parameters to calculate fiber link loss budget
ITU-T Fiber Standards & Attenuation Coefficients
ITU-T G.651.1 Multimode (50/125 μm)
• 850 nm: 3.0 dB/km
• 1300 nm: 1.0 dB/km
G.652.D Standard Single-mode (9/125 μm):
• 1310 nm: 0.35 dB/km
• 1490 nm: 0.40 dB/km
• 1550 nm: 0.20 dB/km
• 1625 nm: 0.40 dB/km
• 1650 nm: 0.40 dB/km
ITU-T G.657.A1/A2 Bend-insensitive
• 1310 nm: 0.35 dB/km
• 1490 nm: 0.40 dB/km
• 1550 nm: 0.20 dB/km
• 1625 nm: 0.40 dB/km
• 1650 nm: 0.40 dB/km
Loss Budget Formula:
Total Loss = Fiber Loss + Connector Loss + Splice Loss
This calculator uses ITU-T standard attenuation coefficients from G.651.1, G.652.D, and G.657.A1/A2 specifications. Values represent typical performance parameters. Always verify component specifications and include appropriate system margins.