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Updated: Jun 11, 2026
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
640 Gbit/s and 1.28 Tbit/s polarisation insensitive all optical wavelength conversion
Hao Hu1, Evarist Palushani, Michael Galili
1DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, DK-2800 Kgs. Lyngby, Denmark. huhao@fotonik.dtu.dk
Optics Express
|July 1, 2010
Summary
This study demonstrates polarization-insensitive all-optical wavelength conversion for high-speed RZ-DPSK signals using specialized fiber. This breakthrough achieves error-free performance with minimal polarization sensitivity.
Area of Science:
- Optical Communications
- Nonlinear Optics
- Photonics
Background:
- All-optical wavelength conversion (AOWC) is crucial for flexible optical networks.
- Polarization sensitivity remains a significant challenge in optical signal processing.
Purpose of the Study:
- To demonstrate polarization-insensitive all-optical wavelength conversion (AOWC).
- To achieve high-speed wavelength conversion for RZ-DPSK signals.
Main Methods:
- Utilized a 100-m polarization-maintaining highly nonlinear fiber (PM-HNLF).
- Employed a polarization diversity loop configuration.
- Leveraged four-wave mixing (FWM) in PM-HNLF for AOWC.
Main Results:
- Achieved polarization-insensitive AOWC for 640 Gbit/s single-channel and 1.28 Tbit/s polarization-multiplexed RZ-DPSK signals.
- Demonstrated error-free performance for wavelength-converted signals.
- Obtained less than 0.5 dB polarization sensitivity.
Conclusions:
- The developed AOWC technique effectively overcomes polarization sensitivity issues.
- This method enables robust and high-speed optical signal processing for advanced communication systems.
