Fiber Optic Cable & Photonic Interconnects worked example

Splice Loss Budget at 99% target splice-loss pass rate: a worked example

Push target splice-loss pass rate up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when checking fusion splice quality for fiber pigtails, fanouts, ribbon fiber, cable repairs, or photonic assemblies.

The inputs for this scenario

  • Splices within loss limit: 388 splices (unchanged)
  • Total measured splices: 400 splices (unchanged)
  • Target splice-loss pass rate: 99 % (raised for this scenario; the documented default is 98)

Working through the calculation

  • Applying the documented formula (Splice-loss pass rate = splices within loss limit รท total measured splices) to the inputs above produces each figure below.
  • At this operating point the engine returns 97 % for splice-loss pass rate, the number this scenario is built around.
  • At this operating point the engine returns 2 points for gap to splice-loss target.
  • At this operating point the engine returns 388 splices for splices within loss limit.
  • At this operating point the engine returns 400 splices for total measured splices.

How this compares with the baseline

  • Against the tool's baseline example, where target splice-loss pass rate sits at 98% and the headline result is 97 %, this scenario lands almost exactly on the baseline at 97 %.
  • It computes the percentage of measured splices that fall within the loss limit and the points by which that pass rate trails your target. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Splice-loss pass rate: 97 % (headline result)
  • Gap to splice-loss target: 2 points
  • Splices within loss limit: 388 splices
  • Total measured splices: 400 splices

Run it with your numbers

  • Every input above is editable in the live Splice Loss Budget calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.