Demonstration of all-optical phase noise suppression scheme using optical nonlinearity and conversion/dispersion delay

Chitgarha, Mohammad Reza; Khaleghi, Salman; Ziyadi, Morteza; Mohajerin-Ariaei, Amirhossein; Almaiman, Ahmed; Daab, Wajih; Rogawski, D.; Tur, Moshe; Touch, Joseph D.; Langrock, Carsten; Fejer, M. M.; Willner, Alan E.

doi:10.1364/ol.39.002928

Cited by 9 publications

(5 citation statements)

References 12 publications

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“…The signal containing phase noise is passed through the proposed scheme to suppress its phase noise. The transfer function of the phase noise suppression can be obtained by calculating the ratio of the input signal phase noise to the phase noise of the output signal [16]. Here, the reduction factor is defined as the ratio of the input phase noise standard deviation to the output phase noise standard deviation in a linear phase differentiator when the original signal is 20-Gbaud QPSK signal.…”

Section: Resultsmentioning

confidence: 99%

“…Phase noise power reduction factor versus frequency of a phase differentiator. The signal is modulated with sinusoidal waveform with variable frequencies and the output phase noise reduction factor is measured [16].…”

Section: Conceptmentioning

confidence: 99%

“…where φ N X (t) and φ N E (t) are the phase noises of X and E, respectively [16]. Assuming the source of phase noises for both P 1 (t) and S In (t) are from laser linewidth, the fluctuation of φ N In (t) and φ P 1 (t) are significantly slower than the symbol rate and we can assume…”

Section: Conceptmentioning

confidence: 99%

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Tunable Homodyne Detection of an Incoming QPSK Data Signal Using Two Fixed Pump Lasers

Chitgarha

Mohajerin-Ariaei

Cao

et al. 2015

J. Lightwave Technol.

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Homodyne detection is of significant interest in optical communications because it detects both the amplitude and phase information of the incoming data channel. One of the challenges in implementing a homodyne receiver is to recover the phase and frequency of the incoming data and to lock these to the local oscillator. We proposed and demonstrated a tunable homodyne detection scheme using two continuous wave pumps to automatically lock a "local" pump laser to an incoming 20-to-40-Gbaud QPSK data signal. Open eyes are obtained for both in-phase and quadrature components of the signal after ∼200-km transmission over single mode fiber (SMF-28) and dispersion compensation fiber without any carrier recovery. The BER performance of the proposed homodyne detection scheme is also performed with and without transmission.Index Terms-Homodyne detection, nonlinear wave mixing, optical coherent communication, phase noise, quadrature phase shift keying (QPSK).

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Section: Resultsmentioning

confidence: 99%

Section: Conceptmentioning

confidence: 99%

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Tunable Homodyne Detection of an Incoming QPSK Data Signal Using Two Fixed Pump Lasers

Chitgarha

Mohajerin-Ariaei

Cao

et al. 2015

J. Lightwave Technol.

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“…In [7,8] an approach relying on the χ effects sum-and difference frequency generation in cascaded periodically poled lithium niobate (PPLN) devices is demonstrated for QPSK regeneration. Introducing an additional HNLF-based equalizer unit, the amplitude is also regenerated.…”

Section: Introductionmentioning

confidence: 99%

A Novel Phase-Locking-Free Phase Sensitive Amplifier-Based Regenerator

Kjoller

Roge

Guan

et al. 2016

J. Lightwave Technol.

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“…1. A QPSK signal contaminated with phase noise is coupled with a CW pump, and injected into a nonlinear wave mixer to generate a phase conjugate copy of the signal [12]. The signal and the conjugate copy are then sent into a χ 3 medium to generate the third-order harmonics of the signal and the conjugate copy.…”

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confidence: 99%

Phase noise mitigation of QPSK signal utilizing phase-locked multiplexing of signal harmonics and amplitude saturation

et al. 2015

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We demonstrate an all-optical phase noise mitigation scheme based on the generation, delay, and coherent summation of higher order signal harmonics. The signal, its third-order harmonic, and their corresponding delayed variant conjugates create a staircase phase-transfer function that quantizes the phase of quadrature-phase-shift-keying (QPSK) signal to mitigate phase noise. The signal and the harmonics are automatically phase-locked multiplexed, avoiding the need for phase-based feedback loop and injection locking to maintain coherency. The residual phase noise converts to amplitude noise in the quantizer stage, which is suppressed by parametric amplification in the saturation regime. Phase noise reduction of ∼40% and OSNR-gain of ∼3 dB at BER 10(-3) are experimentally demonstrated for 20- and 30-Gbaud QPSK input signals.

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Demonstration of all-optical phase noise suppression scheme using optical nonlinearity and conversion/dispersion delay

Cited by 9 publications

References 12 publications

Tunable Homodyne Detection of an Incoming QPSK Data Signal Using Two Fixed Pump Lasers

Tunable Homodyne Detection of an Incoming QPSK Data Signal Using Two Fixed Pump Lasers

A Novel Phase-Locking-Free Phase Sensitive Amplifier-Based Regenerator

Phase noise mitigation of QPSK signal utilizing phase-locked multiplexing of signal harmonics and amplitude saturation

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