Fiber Coupling Efficiency Calculator

Calculate fiber coupling efficiency with mode mismatch, lateral offset, and angular misalignment losses. Computes optimal focal length for beam-to-fiber coupling.

Beam Parameters
Fiber Parameters
Misalignment
Coupling Efficiency
Total efficiency (\u03b7)
85.8%
Total loss
0.66dB
Loss Breakdown
Mode mismatch loss
0.66dB
Lateral offset loss
0.00dB
Angular misalignment loss
0.00dB
Optimal Coupling
Optimal focal length (f)
0.04mm
Abridged Optics — Fiber Coupling Efficiency Calculator v1.0\u03b7 = (2w\u2080w\u1da0/(w\u2080\u00b2+w\u1da0\u00b2))\u00b2 \u00d7 exp(\u22122\u03b4\u00b2/(w\u2080\u00b2+w\u1da0\u00b2)) \u00d7 angular term. Loss = \u221210log\u2081\u2080(\u03b7).

All information, equations, and calculations have been compiled and verified to the best of our ability. For mission-critical applications, we recommend independent verification of all values. If you find an error, please let us know.