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Search: WFRF:(Lundberg Lars 1989) > (2018)

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1.
  • Lundberg, Lars, 1989, et al. (author)
  • Frequency Comb-Based WDM Transmission Systems Enabling Joint Signal Processing
  • 2018
  • In: Applied Sciences (Switzerland). - : MDPI AG. - 2076-3417. ; 8:5
  • Journal article (peer-reviewed)abstract
    • We review the use of optical frequency combs in wavelength-division multiplexed (WDM) fiber optic communication systems. In particular, we focus on the unique possibilities that are opened up by the stability of the comb-line spacing and the phase coherence between the lines. We give an overview of different techniques for the generation of optical frequency combs and review their use in WDM systems. We discuss the benefits of the stable line spacing of frequency combs for creating densely-packed optical superchannels with high spectral efficiency. Additionally, we discuss practical considerations when implementing frequency-comb-based transmitters. Furthermore, we describe several techniques for comb-based superchannel receivers that enables the phase coherence between the lines to be used to simplify or increase the performance of the digital carrier recovery. The first set of receiver techniques is based on comb-regeneration from optical pilot tones, enabling low-overhead self-homodyne detection. The second set of techniques takes advantage of the phase coherence by sharing phase information between the channels through joint digital signal processing (DSP) schemes. This enables a lower DSP complexity or a higher phase-noise tolerance.
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2.
  • Lundberg, Lars, 1989, et al. (author)
  • Phase Correlation Between Lines of Electro-Optical Frequency Combs
  • 2018
  • In: Optics InfoBase Conference Papers. - 2162-2701. ; Part F92-CLEO_AT 2018
  • Conference paper (peer-reviewed)abstract
    • Simultaneous measurement of the phase noise from 49 electro-optical frequency comb lines show a correlation of over 99.99% between lines. Additionally, the phase noise difference between line pairs is correlated, verifying theoretical predictions.
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  • Result 1-3 of 3

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