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Flexible OTDM to WDM converter enabled by a programmable optical processor.

Miguel V Drummond1, António L J Teixeira, Paulo P Monteiro

  • 1Instituto de Telecomunicações, Universidade de Aveiro, Aveiro, Portugal. mvd@av.it.pt

Optics Express
|January 26, 2012
PubMed
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We developed a novel Optical Time Division Multiplexing (OTDM) to Wavelength Division Multiplexing (WDM) converter. This technology offers flexible signal mapping and tunable wavelength conversion for optical networks.

Area of Science:

  • Optical communications
  • Photonics
  • Signal processing

Background:

  • Wavelength Division Multiplexing (WDM) and Optical Time Division Multiplexing (OTDM) are key technologies in high-capacity optical networks.
  • Efficient conversion between OTDM and WDM is crucial for network flexibility and resource utilization.

Purpose of the Study:

  • To propose and demonstrate a novel OTDM to WDM converter.
  • To achieve wavelength tunability and flexible mapping of OTDM tributaries to WDM channels.
  • To ensure modulation format transparency in the conversion process.

Main Methods:

  • Utilizing four-wave mixing (FWM) to convert a 160 Gb/s OTDM signal with a multi-wavelength sampling pulse train (SPT).
  • Generating the multi-wavelength SPT by multicasting an optical clock signal.

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  • Employing a programmable optical processor (POP) for flexible SPT generation, including pulse delay and reshaping.

    • Main Results:

    • Achieved error-free performance for various OTDM tributary to WDM channel mappings.
    • Demonstrated the capability for intermediate rate conversion (e.g., 2x80 Gb/s) through POP reconfiguration.
    • Confirmed wavelength tunability and flexible mapping functionalities.

    Conclusions:

    • The proposed OTDM to WDM converter offers significant flexibility and performance advantages.
    • The use of a POP provides a reconfigurable platform for advanced optical signal processing.
    • This technology contributes to more adaptable and efficient optical communication systems.