Effect of dispersion compensation schemes on nonlinear phase noise in optical transmission system

2006 ◽  
Author(s):  
Xi Qin ◽  
Yong Chen ◽  
Jihong Cao ◽  
Feng Zhang ◽  
Shuisheng Jian
Keyword(s):  
Phase Noise ◽  
Optical Transmission ◽  
Dispersion Compensation ◽  
Transmission System ◽  
Nonlinear Phase

Suppressing of Nonlinear Phase Noise in Dispersion Managed Quasi-Linear Transmission Systems

2014 ◽  
Vol 511-512 ◽  
pp. 234-237
Author(s):  
Hai Tao Chen ◽  
You Cheng Liang
Keyword(s):  
Phase Noise ◽  
High Speed ◽  
Optical Transmission ◽  
Optical Amplifiers ◽  
Phase Conjugation ◽  
Transmission System ◽  
First Order ◽  
Nonlinear Phase ◽  
Calculation Results ◽  
Main Factor

Dispersion and nonlinear effect of fiber is the main factor limiting the performance of the long-haul and high speed optical transmission system. This paper focuses on the analysis and modeling of nonlinear phase noise in quasi-linear optical transmission system. The analytical expression for the nonlinear phase noise is obtained basing on the first order perturbation theory. And the numerical calculation of the nonlinear phase noise is deduced. The calculation results show that when the noise source and the end point of the system is equidistant from the optical phase conjugation (OPC), the nonlinear phase noise added by the optical amplifiers can be compensated by the OPC located after the optical amplifiers.

Automatic polarisation mode dispersion compensation in 40 Gbit/s optical transmission system

1998 ◽  
Vol 34 (23) ◽  
pp. 2258 ◽  
Author(s):  
D. Sandel ◽  
M. Yoshida-Dierolf ◽  
R. Noé ◽  
A. Schöpflin ◽  
E. Gottwald ◽  
...  
Keyword(s):  
Optical Transmission ◽  
Dispersion Compensation ◽  
Transmission System ◽  
Mode Dispersion ◽  
Polarisation Mode Dispersion

scholarly journals Performance Analysis of Subcarrier Multiplexed Optical Transmission System for QPSK Data

2020 ◽  
Vol 9 (2) ◽  
pp. 466-476
Keyword(s):  
Optical Transmission ◽  
Dispersion Compensation ◽  
Chromatic Dispersion ◽  
Transmission System ◽  
Laser Source ◽  
Radio Link ◽  
Link Distance ◽  
Performance Results ◽  
The Impact ◽  
Dispersion And Attenuation

This paper focuses on the impact of different parameters on the performance of the Subcarrier Multiplexed Optical Transmission System for the application on radio link via optical fiber. Performance results are evaluated for QPSK data format for ODSB and OSSB modulation of Microwave subcarriers with digital NRZ coded random data patterns. The four subsystems of QPSK modulators are at 400, 500, 600, 700 MHz subcarrier frequencies with frequency spacing of 100 MHz. The power of subcarriers is decreasing with increasing the link distance due to dispersion and attenuation. By using dispersion compensation fiber, the link distance has been enhanced from 100 km to 240 km successfully. The impact of chromatic dispersion has been reduced in OSSB by using dual-electrode MZM. The constellation diagram also confirms that the phase of the signal after traveling through the link is changing due to dispersion. The phase is the same for subcarrier 600 MHz & 700 MHz for ODSB and OSSB in QPSK SCM. The impact of linewidth and responsivity on SNR has also analyzed to evaluate the performance. It is concluded that the maximum SNR is decreasing with increase in the linewidth of laser source and increasing with the increase in responsivity of PIN diode for the same fiber length in SCM transmission.

Nonlinear Phase Noise Reduction by Gain Saturated Parametric Amplifiers in Coherent Optical Transmission

2017 ◽  
Author(s):  
Wataru Imajuku ◽  
Takahiro Nakaishi ◽  
Mikiya Kakoi ◽  
Kunihiko Mori ◽  
Mitsunori Fukuotoku
Keyword(s):  
Noise Reduction ◽  
Phase Noise ◽  
Optical Transmission ◽  
Parametric Amplifiers ◽  
Nonlinear Phase

scholarly journals Chromatic Dispersion Compensation Effect Performance Enhancements Using FBG and EDFA-Wavelength Division Multiplexing Optical Transmission System

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Mounia Chakkour ◽  
Otman Aghzout ◽  
Badiaa Ait Ahmed ◽  
Fahd Chaoui ◽  
Mounir El Yakhloufi
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Transmission ◽  
Noise Figure ◽  
Dispersion Compensation ◽  
Chromatic Dispersion ◽  
Transmission System ◽  
Complex Model ◽  
Design Parameters ◽  
Optimized Design ◽  
Erbium Doped Fiber Amplifier

An optical transmission system using Fiber Bragg Grating (FBG) and Erbium Doped Fiber Amplifier (EDFA) with new proposed model has been analyzed to overcome chromatic dispersion and attenuation phenomena. To evaluate the transmission system performance of the received signals, a simple model of one channel transmission has been developed in the first step. Also, optical fiber length and attenuation coefficient parameters have been investigated in detail to deal with the optimized corresponding parameter values. Results show that the performance of the optimized design parameters is very efficient in terms of output power (dBm), noise figure (dB), gain (dB), and Q-Factor. The model of one channel developed previously has been adapted to a complex model of four optical channels multiplexing with different wavelengths. FBG and EDFA have been also added to WDM technology system to enhance the chromatic dispersion and the signal attenuation. Results show that the new model is more efficient in terms of Q-Factor and eye diagrams.

Dispersion Compensation in 40 Gb/s Non-Return-to-Zero Optical Transmission System Using Coupled-Cavity Photonic Crystals

2005 ◽  
Vol 44 (No. 41) ◽  
pp. L1282-L1284 ◽  
Author(s):  
Toshihiko Fukamachi ◽  
Kazuhiko Hosomi ◽  
Toshiki Sugawara ◽  
Nobuhiko Kikuchi ◽  
Toshio Katsuyama ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Optical Transmission ◽  
Dispersion Compensation ◽  
Transmission System ◽  
Coupled Cavity

scholarly journals Phase Noise Cancellation in Coherent Communication Systems Using a Radio Frequency Pilot Tone

2019 ◽  
Vol 9 (21) ◽  
pp. 4717 ◽  
Author(s):  
Tianhua Xu ◽  
Cenqin Jin ◽  
Shuqing Zhang ◽  
Gunnar Jacobsen ◽  
Sergei Popov ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Phase Noise ◽  
Communication Systems ◽  
Optical Transmission ◽  
Dispersion Compensation ◽  
Optical Fiber Communication ◽  
Noise Cancellation ◽  
Least Mean Square ◽  
Modulation Formats ◽  
The Impact

Long-haul optical fiber communication employing digital signal processing (DSP)-based dispersion compensation can be distorted by the phenomenon of equalization-enhanced phase noise (EEPN), due to the reciprocities between the dispersion compensation unit and the local oscillator (LO) laser phase noise (LPN). The impact of EEPN scales increases with the increase of the fiber dispersion, laser linewidths, symbol rates, signal bandwidths, and the order of modulation formats. In this work, the phase noise cancellation (PNC) employing a radio frequency (RF) pilot tone in coherent optical transmission systems has been investigated. A 28-Gsym/s QPSK optical transmission system with a significant EEPN has been implemented, where the carrier phase recovery (CPR) was realized using the one-tap normalized least-mean-square (NLMS) estimation and the differential phase detection (DPD), respectively. It is shown that the RF pilot tone can entirely eliminate the LPN and efficiently suppress the EEPN when it is applied prior to the CPR.

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