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Transmission Technology: what’s the big deal? - page 32 / 46

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Regeneration is required in traditional long-haul (LH) systems to extend reach beyond a single system’s capabilities.

On LH systems, regeneration is generally required every 500-600km.

Required due to OSNR limitations in LH system’s optical design:

No or limited FEC

Simple NRZ modulation

Simplistic dispersion compensation

No gain equalization

Operation in C-band or multiple bands

Ultra-Long-Haul (ULH) systems achieve reaches of 2000 to 6000km, thus eliminating the need for most regeneration.

Regeneration

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