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Calcimator

Splice Loss Calculator

Calculate expected fiber splice loss from alignment parameters, fiber type, and splice method. Compare fusion vs mechanical splice losses.

Inputs

μm
°
μm

Results

Calculated Loss per Splice

0.181 dB

Total (All Splices)

1.81 dB

Lateral Offset Loss0.04 dB
Angular Offset Loss0.111 dB
End Separation Loss0.03 dB
Typical for Method0.05 dB
Worst Case0.1 dB
Typical Total0.5 dB
Worst-Case Total1 dB
Na0.12
How to Use This Calculator
  1. Select Splice Method (Fusion or Mechanical) — fusion splices are typically lower loss (0.02–0.1 dB) than mechanical (0.1–0.5 dB).
  2. Choose Fiber Type (single-mode or multimode) to set the baseline splice loss model.
  3. Enter Lateral Core Offset (μm), Angular Offset (°), and End Separation (μm) from your splice alignment unit display.
  4. Enter Number of Splices to calculate total link splice loss.
  5. Review Calculated Loss per Splice, Worst Case, Total (All Splices), and Typical Total — verify all values are within your loss budget.

How the result changes with Angular Offset

Angular OffsetCalculated Loss per SpliceTotal (All Splices)
0.50.181 dB1.81 dB
1.751.428 dB14.28 dB
3.254.753 dB47.53 dB
4.59.048 dB90.48 dB

What each input means

Splice Method
1=Fusion Splice, 2=Mechanical Splice
Fiber Type
1=Single-Mode (9μm), 2=Multi-Mode 50μm, 3=Multi-Mode 62.5μm
Lateral Core Offset
Lateral misalignment between fiber cores (fusion splicer typically <0.5 μm)
Angular Offset
Angular misalignment between fibers in degrees
End Separation
Gap between fiber end faces (fusion splice: ~0, mechanical: 1-5 μm)
Number of Splices
Total number of splices in the link for cumulative loss

How this is calculated

Formula

Loss ≈ 4.343 × (offset/MFD)² + angular + Fresnel losses

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Splice Method = 1, Fiber Type = 1, Lateral Core Offset = 0.5, Angular Offset = 0.5 = 6 input(s) provided
  2. Calculate Calculated Loss per Splice
    Calculated Loss per Splice
    0.181 = 0.181
  3. Calculate Total
    Total
    1.81 = 1.81
  4. Calculate Lateral Offset Loss
    Lateral Offset Loss
    0.04 = 0.04
  5. Calculate Angular Offset Loss
    Angular Offset Loss
    0.111 = 0.111

Engine last updated . Checked against 4 independently-derived tests — how we verify calculators.

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