Fiber Optic Link Loss & Power Budget Calculator
Calculate total passive optical dB attenuation across Single-Mode (OS1/OS2) and Multi-Mode (OM3/OM4/OM5) fiber optic links. Factor in fiber distance, fusion splices, connector pairs, and TIA-568 safety margins.
Fiber Optic Link Loss Calculator
Calculate passive decibel (dB) attenuation budgets for fiber optic links based on length, splices, connector interfaces, and safety margins (TIA-568 standards).
Link Budget & Loss Breakdown
Total Link Loss Budget
0.00 dB
Calculated passive link loss. Optical receivers must support margins greater than this.
Loss Breakdown
Fiber Core Attenuation-
Connector Interface Loss-
Splice Attenuation-
Safety Margin Protection-
Fiber Optic Attenuation Standards (TIA-568-D)
Optical link loss calculation ensures receiver power levels remain within the dynamic operating range of SFP/QSFP transceivers (between receiver sensitivity and saturation threshold).
Standard Attenuation Constants
- Single-Mode 1310 nm: ~0.35 dB/km core loss.
- Single-Mode 1550 nm: ~0.22 dB/km core loss (optimal for long-haul CWDM/DWDM).
- Multi-Mode 850 nm: ~3.0 dB/km core loss.
- Standard Connector Loss: 0.75 dB max per mated LC/SC pair (TIA-568 standard limit).
- Fusion Splice Loss: 0.1 dB typical per fusion splice.