Optical Fiber Simulator

Explore total internal reflection, numerical aperture, and simplified LP mode profiles in an interactive step-index fiber model.

Everything you need to visualize fiber optics

Ray tracing

Watch guided and leaky rays bounce through a step-index core with live acceptance-cone overlay.

Numerical aperture

Adjust core and cladding indices and see critical angle, NA, and acceptance half-angle update instantly.

Mode profiles

Compare illustrative LP₀₁ and LP₁₁ transverse intensity shapes for intuition — not a full eigenmode solver.

Hands-on controls

Sliders for refractive indices, fiber length, and launch angle with one-click inside/outside cone presets.

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Create a free account and launch this app from your personal workspace.

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Create a space

Run the simulator with your team inside a branded VTC space.

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