Influence of Polarization Transformation in Phase Conjugation of PM-QPSK in Nonlinear SOAs
05 May 2019-
TL;DR: Polarization insensitive phase conjugation generation is experimentally demonstrated using a single pump in a nonlinear SOA for 10 GBaud PM-QPSK data in this article, where the influence of polarization transformation properties specific to signal-pump detuning conditions are established.
Abstract: Polarization insensitive phase conjugation generation is experimentally demonstrated using a single pump in a nonlinear SOA for 10 GBaud PM-QPSK data. The influence of polarization transformation properties specific to signal-pump detuning conditions are established. © 2019 The Author(s)
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TL;DR: In this article, a new method was proposed to compensate exactly for both chromatic dispersion and self-phase modulation in a transmission fiber, where the light intensity changes due to fiber loss and amplifier gain.
Abstract: We propose a new method to compensate exactly for both chromatic dispersion and self-phase modulation in a transmission fiber, where the light intensity changes due to fiber loss and amplifier gain. This method utilizes optical phase conjugation (OPC). The pulse shape is precompensated before OPC by transmission through a fiber with large dispersion. A computer simulation demonstrates effective compensation for waveform distortion in a 40 Gb/s NRZ intensity-modulated light transmission.
258 citations
TL;DR: The performance limit of CMA-based polarization demultiplexing through computer simulations is discussed and the method of improving its performance is demonstrated.
Abstract: In the digital coherent optical receiver, we can achieve polarization demultiplexing in the digital domain, using a two-by-two matrix controlled by the constant-modulus algorithm (CMA). In this paper, after elucidating the physics behind CMA for polarization demultiplexing, we discuss the performance limit of CMA-based polarization demultiplexing through computer simulations. The method of improving its performance is also demonstrated.
83 citations
TL;DR: A counter-propagating cross-polarized degenerate pumping scheme is proposed for the polarization-insensitive conjugate generation, simultaneously in both input and output ports of the SOA for the first time.
Abstract: We explain the generation of four wave mixing (FWM) components at the front and back facets of semiconductor optical amplifiers (SOAs) based on the Bragg-scattering from the propagating gratings in the SOAs. We propose a counter-propagating cross-polarized degenerate pumping scheme for the polarization-insensitive conjugate generation, simultaneously in both input and output ports of the SOA for the first time. The corresponding Bragg scattering processes along with the phase matching conditions are described and the detuning performance of the generated conjugate in either port are experimentally validated. Polarization-insensitive phase conjugate generation at both input and output ports of the SOA through Bragg scattering FWM is further demonstrated.
13 citations
29 Jul 2018
TL;DR: In this article, the authors demonstrate the generation of polarization insensitive phase conjugate of PM-QPSK signal in both input and output ports of SOA using partially degenerate four wave mixing with pump power of only 4 dBm.
Abstract: We experimentally demonstrate the generation of polarization insensitive phase conjugate of PM-QPSK signal in both input and output ports of SOA using partially degenerate four wave mixing with pump power of only 4 dBm.
1 citations