Polarization-Insensitive Phase Conjugation of QPSK Signal Using Bragg-Scattering FWM in SOA

Sobhanan, Aneesh; Venkatasubramani, Lakshmi Narayanan; Koilpillai, R. David; Venkitesh, Deepa

doi:10.1109/lpt.2019.2913257

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…However, by launching larger power, overall increase in reach can be obtained, and that too without any digital signal processing for dispersion and nonlinearity compensation. This scheme can be further extended to polarization multiplexed configuration based on the polarization insensitive implementation reported in [19]. We also demonstrate conjugate generation in the entire C-band with the SOA, and hence the results presented in this paper provides a pathway for all-optical dispersion compensation and nonlinearity compensation for a practical link, using compact and energy efficient nonlinear SOA.…”

Section: Resultsmentioning

confidence: 62%

Dispersion and Nonlinearity Distortion Compensation of the QPSK/16QAM Signals Using Optical Phase Conjugation in Nonlinear SOAs

et al. 2020

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We experimentally demonstrate the simultaneous compensation of both dispersion and nonlinear effects in a 100 km optical fiber link using optical phase conjugation of a 21 GB aud QPSK and 16QAM signal with nonlinear SOAs. Error-free performance is recorded for a launched power of up to 12 dBm, without any digital signal processing to compensate for distortions due to chromatic dispersion and nonlinear effects in fiber. The performance is verified for operation across the C-band.

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Section: Resultsmentioning

confidence: 62%

Dispersion and Nonlinearity Distortion Compensation of the QPSK/16QAM Signals Using Optical Phase Conjugation in Nonlinear SOAs

et al. 2020

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“…A detailed analysis on the distortion tolerance on the length asymmetry when SOA based OPC is employed is a future topic to study. Also, this scheme can be further extended to polarization multiplexed configuration based on the polarization-insensitive phase conjugate generation as reported in [35].…”

Section: Resultsmentioning

confidence: 99%

Optical Phase Conjugation Using Nonlinear SOA for Nonlinearity and Dispersion Compensation of Coherent Multi-Carrier Lightwave Systems

et al. 2021

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We study the use of nonlinear semiconductor optical amplifier (SOA) for generating optical phase conjugate towards compensation of distortions in short distance optical fiber transmission due to Kerr nonlinearity and chromatic dispersion in coherent multi-carrier lightwave signals. We experimentally demonstrate the effectiveness of the SOA-based phase conjugator to improve the link budget with a 100 km standard single mode fiber link for 20 GHz coherent OFDM signals, with QPSK and 16QAM modulations and a corresponding net bit-rate of 40 Gbps and 80 Gbps respectively. Mid-span spectral inversion scheme is employed where the optical phase conjugate is generated through a partially degenerate four-wave mixing process in a nonlinear SOA. We demonstrate a bit error rate performance within 2 × 10 −2 for an average launched power of up to 12 dBm (9 dBm) for QPSK (16QAM) coherent OFDM signals, in a 100 km fiber link. We also investigate the possible improvement in link budget using numerical simulation for 16QAM and 64QAM CO-OFDM signals with the proposed scheme.INDEX TERMS Orthogonal frequency division multiplexing, semiconductor optical amplifier, optical phase conjugation.

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“…The SOA considered in our OPC subsystem is an active optical device, which supports the nonlinear response in the bidirectional operation, depicted in Figure 1. In such nonlinear unit, the bidirectionally injected pump P could perform the nonlinear mixing behavior through FWM with the single-launched signal S, obtaining the OPC products from the two ports of SOA at the same time [25]. This process is also related to the polarization of the input pump and signal.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…The signal processing in such systems performed amplitude regeneration for OOK [22] or quadrature phase-shift keying (QPSK) signals [23,24] through the conventional optical parametric processes. A novel scheme by using a bidirectional SOA configuration was proposed, in which the four-wave mixing (FWM) process between pump and signal not only happened at the co-propagating directions, but also at the opposite direction where there was no signal launched [25]. In this paper, we focus on the pump selection and the consequent OPC behaviors in the nonlinear bidirectional SOA configuration by simulation and experiment.…”

Section: Introductionmentioning

confidence: 99%

Optical Phase Conjugation Conversion through a Nonlinear Bidirectional Semiconductor Optical Amplifier Configuration

Sun

Wen

et al. 2022

Photonics

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The optical phase conjugation (OPC) process is thoughtfully investigated in a nonlinear bidirectional semiconductor optical amplifier subsystem (SOA), demonstrating the conjugation conversion through the two ports of the SOA, simultaneously. The spectral responses, the nonlinear power curves and the quality optimization of the conjugated are discussed through the simulation in nonlinear bidirectional configuration. The experimental investigation of the polarization-insensitive SOA further confirms the OPC behavior in the bidirectional operation, achieving the error-free conjugation conversion with an output optical signal-to-noise ratio (OSNR) of up to 16 dB. The nonlinear bidirectional SOA configuration tested in the system relaxes the requirement of the conventional four-wave mixing (FWM), enabling the OPC conversion with the signal regeneration in only one unit.

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Polarization-Insensitive Phase Conjugation of QPSK Signal Using Bragg-Scattering FWM in SOA

Cited by 9 publications

References 15 publications

Dispersion and Nonlinearity Distortion Compensation of the QPSK/16QAM Signals Using Optical Phase Conjugation in Nonlinear SOAs

Dispersion and Nonlinearity Distortion Compensation of the QPSK/16QAM Signals Using Optical Phase Conjugation in Nonlinear SOAs

Optical Phase Conjugation Using Nonlinear SOA for Nonlinearity and Dispersion Compensation of Coherent Multi-Carrier Lightwave Systems

Optical Phase Conjugation Conversion through a Nonlinear Bidirectional Semiconductor Optical Amplifier Configuration

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