What is the difference between RWP (Reduced Water Peak) and ZWP (Zero Water Peak Fiber?

February 12, 2020

Zero Water Peak is a marketing term for a fiber that is slightly (0.01dB/km) better at the 1383nm wavelength. There is no industry standard for ZWP fiber and both RWP and ZWP meet the requirements of ITU G.652.D full spectrum fiber.

Technically there is little reason to use ZWP over RWP.

  • There are no compatibility issues
  • There is no measurable impact to loss budget
  • There is no significant performance difference

The only difference in performance is at the 1383nm wavelength.

  • ZWP Attenuation 0.34/0.31/0.21 dB/km @ 1310/1383/1550 nm
  • RWP Attenuation 0.32/0.32/0.18 dB/km @ 1310/1383/1550 nm

Superior Essex offers ZWP fiber upon customer request

Contact us directly.

We know that not every project is the same and that not every application is an easy spec to meet. We want to talk with you to meet the need of any challenge that you have.

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