Signal Integrity at 1310 nm

AOP measures the optical power across the spectrum as a function of wavelength and also, modulation frequency. Correspondingly, in plasmonic circuits, this frequency dependence becomes negligible because they maintain a flat response up to 145 GHz. As a result, AOP stays consistent across a wide bandwidth.

OMA measures the actual optical power that a system switches on and off. Unlike the extinction ratio, which often misleads without amplitude data, OMA, expressed in dBm, clearly shows how strong the modulation is. Therefore, this value directly boosts system efficiency and improves link performance.

Measured at a specific operating point. It’s generally lower than the static that is more like a theoretical value given by the transmission spectrum. So the dynamic measurement takes the operating point into consideration.

Given a certain OMA, the dynamic ER indicates the difference in dB between the on and the off state, given as a ratio.

As PAM4 signaling replaced NRZ, the industry introduced TDECQ to better assess signal degradation. Subsequently, TDECQ stands for Transmitter Dispersion Eye Closure for Quaternary signals and reflects the penalty, in dB, compared to an ideal transmitter.

Rather than being measured directly, engineers typically derive TDECQ from the sampling scope’s SER analysis. A lower TDECQ value indicates superior performance and better eye opening.

They are the visual way to present signal integrity. Here we present our first-generation 1310 nm Mach-Zehnder Modulators (MZMs) and ring resonator modulators (RRMs) with eye openings across various modulation formats after off-line signal processing.

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