Parametric Amplification, Wavelength Conversion, and Phase Conjugation of a 2.048-Tbit/s WDM PDM 16-QAM Signal

Hao Hu (Invited author), R. M. Jopson (Invited author), A. H. Gnauck (Invited author), M. Dinu (Invited author), S. Chandrasekhar (Invited author), Chongjin Xie (Invited author), Sebastian Randel (Invited author)

    Research output: Contribution to journalJournal articleResearchpeer-review


    We demonstrate polarization-independent parametric amplification of a 2.048-Tbit/s 8-WDM PDM 16-QAM signal and simultaneous wavelength conversion and phase conjugation in a highly nonlinear fiber. Two high-power continuous-wave pumps with orthogonal polarizations and counter-phase modulation are used in the fiber optical parametric amplifier (FOPA) to achieve broadband flat gain, polarization independence, and high-quality idler generation. The polarization-independent FOPA is amplitude and phase preserving and has similar to 10 dB on-off gain for the signal and similar to 9 dB conversion efficiency for the idler with a 1-dB bandwidth of similar to 16 nm. Compared to the back-to-back case, the amplified signals and the wavelength-converted conjugates have mean Q(2) penalties of only 0.6 and 0.4 dB, respectively, with variances of Q(2) factors across all the wavelength-division-multiplexed channels of only 0.3 dB. This demonstration shows the great promise of optical signal processing techniques to simultaneously process large-capacity multiple-channel multilevel signals with almost no latency and potentially low power consumption.
    Original languageEnglish
    JournalJournal of Lightwave Technology
    Issue number7
    Pages (from-to)1286-1291
    Publication statusPublished - 2015


    • 16-state quadrature amplitude modulation (16-QAM)
    • Fiber optical parametric amplification (FOPA)
    • four-wave mixing (FWM)
    • highly non-linear fiber (HNLF)
    • optical phase conjugation (OPC)
    • optical signal processing (OSP)
    • polarization diversity
    • wavelength conversion
    • wavelength-division-multiplexing (WDM)
    • Amplitude modulation
    • Fiber amplifiers
    • Fibers
    • Four wave mixing
    • Modulation
    • Multiplexing
    • Nonlinear optics
    • Optical frequency conversion
    • Optical signal processing
    • Phase modulation
    • Polarization
    • Quadrature amplitude modulation
    • Signal processing
    • Wavelength division multiplexing
    • Fiber optical parametric amplifications
    • Highly nonlinear fiber(HNLF)
    • Optical signal processing (OSP)
    • Polarization diversity
    • Optical parametric amplifiers
    • OPTICS
    • 640 GBIT/S
    • FIBER
    • optical fibre amplifiers
    • optical fibre polarisation
    • optical information processing
    • optical modulation
    • optical parametric amplifiers
    • phase modulation
    • quadrature amplitude modulation
    • wavelength division multiplexing
    • Communication, Networking and Broadcast Technologies
    • Photonics and Electrooptics
    • bit rate 2.048E+12 bit/s
    • gain 1.0E+00 dB
    • gain 3.0E-01 dB
    • gain 4.0E-01 dB
    • gain 6.0E-01 dB
    • 8-WDM PDM 16-QAM signal
    • bit rate 2.048 Tbit/s
    • broadband flat gain
    • Fiber nonlinear optics
    • fiber optical parametric amplifier
    • FOPA
    • Gain
    • gain 0.3 dB
    • gain 0.4 dB
    • gain 0.6 dB
    • gain 1 dB
    • high-power continuous-wave pump
    • high-quality idler generation
    • highly nonlinear fiber
    • large-capacity multiple-channel multilevel signal
    • Optical fiber amplifiers
    • Optical fiber polarization
    • optical signal processing technique
    • Optical wavelength conversion
    • orthogonal polarization-independent parametric amplification
    • phase conjugation
    • polarization-division-multiplexing
    • power consumption
    • wavelength-division-multiplexed channel


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