Bridging Electrical and Optical Worlds: Enabling Accurate End-to-End EOE Simulation for Ethernet Systems

As data rates continue to surge across AI clusters, cloud infrastructure, and next-generation networks, the industry is rapidly shifting from electrical interconnects to optical communication. Optical links offer unmatched bandwidth, lower loss, and improved signal integrity over long distances, making them essential for modern high-speed systems.

But designing these systems isn’t straightforward.

At the heart of every optical link lies a critical transformation: Electrical → Optical → Electrical (EOE). And understanding this transformation holistically is the key to building reliable, high-performance systems.

The Challenge: Designing Across Two Worlds

In a real system, electrical and optical domains are tightly coupled:

Traditionally, engineers simulate these domains separately. But this approach breaks down when:

The result? Inaccurate predictions, late-stage surprises, and costly redesigns.

To truly understand system behavior, engineers need end-to-end co-simulation of the complete EOE link.

The Need for True End-to-End EOE Simulation

An EOE system is more than just a chain of components, it’s a multi-physics, multi-domain system involving:

Capturing these interactions requires:

This is exactly where Keysight’s solution comes in.

Introducing a Unified EOE Solution

By combining Keysight Photonic Designer with System Designer for Ethernet within ADS, engineers can now simulate the complete EOE chain in a single environment.

This unified workflow enables:

Instead of stitching together multiple tools, engineers can now model:

all within one cohesive framework.

Why This Matters: Capturing Real-World Effects

One of the biggest advantages of end-to-end EOE simulation is the ability to capture real-world impairments that are often missed in isolated simulations.

1. Modulator Nonlinearity – A Hidden Performance Killer

Optical modulators, such as Mach-Zehnder Modulators (MZMs), are inherently nonlinear devices.

Our simulations demonstrate that:

For example:

These distortions directly impact BER, but are only visible in a full EOE simulation environment.

2. Laser RIN – Noise That Scales with Power

Relative Intensity Noise (RIN) from the laser doesn’t just add noise—it behaves differently across signal levels:

In a linear system, this effect may appear manageable—but when combined with nonlinearity, it becomes significantly more complex and impactful.

3. Fiber Effects – Dispersion and ISI

As link distances increase, fiber impairments such as chromatic dispersion introduce:

Unlike nonlinearity (which compresses levels), dispersion distorts timing—making it a fundamentally different challenge that must be analyzed together with other effects.

The Power of Co-Simulation

What makes these results particularly valuable is not just the individual effects—but their interaction.

Only a true EOE simulation can answer questions like:

With Keysight ADS, engineers can:

Scaling to Real Systems: From Single Channel to WDM

The solution is not limited to simple links.

Engineers can extend simulations to:

This enables realistic evaluation of modern data center and telecom links—before any hardware is built.

Accelerating Innovation in Optical System Design

As systems become more complex, the gap between electrical and optical design must disappear.

End-to-end EOE simulation provides:

Explore the Solution

If you’re designing next-generation optical links, it’s time to move beyond fragmented workflows.

Discover how you can simulate and optimize complete EOE systems with Keysight:

Start exploring the solution and unlock accurate, end-to-end optical system design.

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