Direct Observation of Cross-Phase-Modulation-Induced Nonlinear Phase Noise

2013 ◽  
Vol 6 (6) ◽  
pp. 062203
Author(s):  
Hidemi Tsuchida
Keyword(s):  
Phase Noise ◽  
Direct Observation ◽  
Phase Modulation ◽  
Cross Phase Modulation ◽  
Nonlinear Phase

scholarly journals Mitigation of Nonlinear Phase Noise in Single-channel Coherent 16-QAM Systems Employing Logistic Regression

2021 ◽  
Author(s):  
Romulo de Paula ◽  
Lucas Marim ◽  
Rafael Penchel ◽  
Yessica Rumaldo Bustamante ◽  
Marcelo Francisco Luis Abbade ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Phase Noise ◽  
Phase Modulation ◽  
Performance Enhancement ◽  
Single Channel ◽  
Nonlinear Phase ◽  
Error Ratio ◽  
Bit Error Ratio ◽  
The Impact ◽  
System Operating

Abstract We propose and analyze a classier based on logistic regression (LR) to mitigate the impact of nonlinear phase noise (NPN) caused by Kerr induced self-phase-modulation in digital coherent systems with single-channel unrepeated links. Simulation results reveal that the proposed approach reduces the bit error ratio (BER) in a 100-km-long 16 quadrature amplitude modulation (16-QAM) system operating at 56-Gbps. Thus, the BER is reduced from 6.88·10 -4 when using maximum likelihood to 4.27·10 -4 after applying the LR-based classification, representing an increase of 0.36 dB in the effective Q-factor. This performance enhancement is achieved with only 624 operations per symbol, which can be easily parallelized into 16 lines of 39 operations.

scholarly journals Cross-phase modulation spectral shifting: nonlinear phase contrast in a pump-probe microscope

2012 ◽  
Vol 3 (5) ◽  
pp. 854 ◽  
Author(s):  
Jesse W. Wilson ◽  
Prathyush Samineni ◽  
Warren S. Warren ◽  
Martin C. Fischer
Keyword(s):  
Phase Modulation ◽  
Phase Contrast ◽  
Cross Phase Modulation ◽  
Pump Probe ◽  
Nonlinear Phase ◽  
Spectral Shifting ◽  
Probe Microscope
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