Time Lens based Optical Fourier Transformation for All-Optical Signal Processing of Spectrally-Efficient Data

Pengyu Guan, Kasper Meldgaard Røge, Mads Lillieholm, Michael Galili, Hao Hu, Toshio Morioka, Leif Katsuo Oxenløwe

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We review recent progress in the use of time lens based optical Fourier transformation for advanced all-optical signal processing. A novel time lens based complete optical Fourier transformation (OFT) technique is introduced. This complete OFT is based on two quadratic phase-modulation stages using four-wave mixing (FWM), separated by a dispersive medium, which enables time-to-frequency and frequency-to-time conversions simultaneously, thus performing an exchange between the temporal and spectral profiles of the input signal. Using the proposed complete OFT, several advanced all-optical signal processing schemes for spectrally-efficient systems and networks have been achieved, including all-optical generation, detection and format conversion of spectrally-efficient signals. The spectrally-efficient signals in this paper mainly refer to efficiently multiplexed signals with a high symbol rate per Hz, such as orthogonal frequency division multiplexing (OFDM), Nyquist wavelength-division multiplexing (Nyquist-WDM) and Nyquist optical time division multiplexing (Nyquist-OTDM) signals.
Original languageEnglish
Article number7579624
JournalJournal of Lightwave Technology
Issue number4
Pages (from-to)799 - 806
Publication statusPublished - 2017

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  • Atomic and Molecular Physics, and Optics
  • All-optical OFDM
  • Nyquist-WDM
  • optical Fourier transformation
  • optical signal processing
  • OTDM
  • Four wave mixing
  • Fourier transforms
  • Frequency division multiplexing
  • Lenses
  • Metadata
  • Multiplexing
  • Optical fiber communication
  • Optical signal processing
  • Phase modulation
  • Signal processing
  • Time division multiplexing
  • Wavelength division multiplexing
  • All-optical signal processing
  • Fourier transformations
  • Multiplexed signals
  • Nyquist
  • Nyquist wavelength division multiplexing (nyquist WDM)
  • Optical time division multiplexing
  • Orthogonal frequency division multiplexing


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