Fiber Optic Training Lab v1.4 Field Optics Release

Single-mode: ~9 µm core. Long distance, lower loss, common at 1310/1550 nm.
Multimode: 50/62.5 µm core. Shorter reach, common at 850 nm.
dB: ratio measurement. Every 3 dB is roughly half/double power. 10 dB is 10×.
dBm: absolute optical power referenced to 1 mW.

Learn fiber like a field engineer

This standalone lab teaches what light does inside fiber, how to plan link budgets, how splices fail, how to read OTDR traces, how SFPs behave, and how distance, wavelength, connectors, reflections, and dispersion change a circuit.

Interactive calculatorsOTDR canvas simulatorSplice coachSFP DOM diagnosisQuiz mode