Journal ArticleDOI
Polarization-Insensitive Phase Conjugation of QPSK Signal Using Bragg-Scattering FWM in SOA
TLDR
In this paper, the authors demonstrate phase conjugate generation of 10 GBd PM-QPSK signal, simultaneously in both input and output ports of the SOA, with a penalty of < 1.5 dB.Abstract:
We experimentally demonstrate polarization-insensitive phase conjugate generation in a semiconductor optical amplifier (SOA) using a counter-propagating and cross-polarized degenerate pump. The polarization-insensitive operation is achieved in both the ports of the SOA through Bragg scattering four-wave mixing. The nature of polarization transformation of the process necessitates the selection of frequency of the signal to be larger than that of the pump for the penalty-free performance of the polarization-insensitive conjugate generation. We demonstrate the phase conjugate generation of 10 GBd PM-QPSK signal, simultaneously in both input and output ports of the SOA, with a penalty of <1.5 dB.read more
Citations
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Journal ArticleDOI
Dispersion and Nonlinearity Distortion Compensation of the QPSK/16QAM Signals Using Optical Phase Conjugation in Nonlinear SOAs
TL;DR: In this paper, the authors 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.
Journal ArticleDOI
Semiconductor optical amplifiers: recent advances and applications
Deepa Venkitesh,Laura Dybyssova +1 more
TL;DR: In this article , the basic functioning of an optical amplifier and distortions of coherent signals when used as amplifiers are discussed, and optical signal processing techniques enabled by SOAs with an emphasis on all-optical wavelength conversion, optical phase conjugation, and phase quantization of coherent optical signals.
Journal ArticleDOI
Optical Phase Conjugation Conversion through a Nonlinear Bidirectional Semiconductor Optical Amplifier Configuration
TL;DR: In this paper , the optical phase conjugation (OPC) process is investigated in a nonlinear bidirectional semiconductor optical amplifier subsystem (SOA), demonstrating the OPC conversion through the two ports of the SOA, simultaneously.
Journal ArticleDOI
Spectral shaped PAM4 signal based on nonlinear differential coding for AOWC system with Self-pumping structure
TL;DR: In this article , the authors proposed a self-pumping scheme for all-optical wavelength conversion (AOWC) systems with laser-driven Mach-Zehnder modulator.
Journal ArticleDOI
Optical Phase Conjugation Using Nonlinear SOA for Nonlinearity and Dispersion Compensation of Coherent Multi-Carrier Lightwave Systems
Lakshmi Narayanan Venkatasubramani,Aneesh Sobhanan,Anirudh Vijay,R. David Koilpillai,Deepa Venkitesh +4 more
TL;DR: 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 is experimentally demonstrated.
References
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Population pulsations and nondegenerate four-wave mixing in semiconductor lasers and amplifiers
TL;DR: In this article, the authors studied the physical processes that lead to population pulsations in nearly degenerate four-wave mixing, and showed that the gain and the index grating contribute to NDFWM.
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Polarization demultiplexing in Stokes space
TL;DR: A technique is demonstrated for polarization demultiplexing of arbitrary complex-modulated signals using data in Stokes space to find the best fit plane and the normal to it which contains the origin.