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Wavelength-maintaining polarization-insensitive all-optical 3R regenerator.

Shelby Savage, Bryan Robinson, Scott Hamilton

    Optics Express
    |June 9, 2009
    PubMed
    Summary

    A novel all-optical regenerator enables high-speed fiber communications by maintaining signal quality regardless of input polarization. This wavelength-maintaining 3R regenerator achieves a 21 dB extinction ratio with no performance penalty.

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    Area of Science:

    • Optical communications
    • Nonlinear optics
    • Semiconductor optoelectronics

    Background:

    • High-speed long-haul fiber optic systems demand efficient signal regeneration.
    • Current regeneration methods face challenges with speed and polarization sensitivity.

    Purpose of the Study:

    • To demonstrate a polarization-insensitive, wavelength-maintaining 3R all-optical regenerator.
    • To improve signal regeneration efficiency for high-rate fiber communications.

    Main Methods:

    • Integration of a semiconductor optical amplifier wavelength converter into a folded ultrafast nonlinear interferometer.
    • Characterization of extinction ratio, bit-error rate (BER), and polarization dependence.

    Main Results:

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  • Achieved a polarization-insensitive wavelength-maintaining 3R all-optical regenerator.
  • Demonstrated a high extinction ratio of 21 dB.
  • Showed no error floor in BER measurements and a power penalty of <0.3 dB, independent of input polarization.

    • Conclusions:

    • The developed all-optical regenerator offers robust performance for high-rate fiber communications.
    • The design maintains constant polarization and output power, unaffected by input polarization variations.
    • This technology addresses key requirements for future high-speed optical networks.