Compensation of chromatic dispersion in a single-mode fiber by optical phase conjugation

1993 ◽  
Vol 5 (1) ◽  
pp. 92-95 ◽  
Author(s):  
S. Watanabe ◽  
T. Naito ◽  
T. Chikama
Keyword(s):  
Phase Conjugation ◽  
Chromatic Dispersion ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Optical Phase Conjugation ◽  
Optical Phase

40  Gb/s DWDM Structure with Optical Phase Configuration for Long-Haul Transmission System

2017 ◽  
Vol 38 (1) ◽  
Author(s):  
Hsiu-Sheng Lin ◽  
Po-Chou Lai
Keyword(s):  
Wavelength Division Multiplexing ◽  
Phase Conjugation ◽  
Dispersion Compensation ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Single Mode Fiber ◽  
Erbium Doped Fiber Amplifier ◽  
Differential Phase Shift ◽  
Optical Phase ◽  
Dwdm System

AbstractWe propose the experimental transport of 48 channels with 40 Gbit/s dense wavelength-division multiplexing (DWDM) system that uses single-mode fiber (SMF) in combination with dispersion compensation fiber (DCF) which is a dispersion compensation device, in C and L band wavelength range to solve the dispersion program. The DWDM system scheme employing single Mach–Zehnder modulation (MZM) return-to-zero differential phase-shift keying (RZ-DPSK) modulation format with hybrid Raman/EDFA (Erbium-doped fiber amplifier) configuration to improve transmission signal, and employing an optical phase conjugation (OPC) configuration in the middle line. That can compensate for dispersion impairment and improve nonlinear effects to investigate transmission distance performances.

scholarly journals Symmetric-type dispersion maps in dispersion-managed optical link with mid-span spectral inversion

2020 ◽  
Vol 20 (1) ◽  
pp. 222
Author(s):  
Jea-Pil Chung ◽  
Seong-Real Lee
Keyword(s):  
Communication Systems ◽  
Group Velocity Dispersion ◽  
Phase Conjugation ◽  
Single Mode ◽  
Fiber Amplifier ◽  
Single Mode Fiber ◽  
Erbium Doped Fiber Amplifier ◽  
Optical Link ◽  
Optical Phase ◽  
Wavelength Division

In long-haul optical communication systems consisting of single-mode fiber spans and fiber amplifiers, such as an erbium-doped fiber amplifier, signal distortion causes performance to deteriorate because of group velocity dispersion and fiber nonlinearity. A combination of dispersion management and optical phase conjugation is an effective technique of compensating for the distortion. In an optical link configured with this combination, the dispersion map mainly affects the compensation for the distorted optical signals. Improvements in system performance have been reported for various types of dispersion maps. In this study, a symmetric type of dispersion map with respect to the midway optical phase conjugator is proposed. The effect of the proposed dispersion maps on the compensation for the distorted 24 channel × 40 Gbps wavelength-division-multiplexed signals was assessed through numerical simulation. It was confirmed that antipodal-type dispersion maps are most appropriate for the compensation, as well as for the flexibility of the link configuration.

scholarly journals Impact of Frequency Shift on Nonlinear Compensation Using Optical Phase Conjugation for M-QAM Signals

2019 ◽  
Author(s):  
Binh Nguyen ◽  
Hung Tan Nguyen ◽  
Dien Van Nguyen ◽  
Tuan Van Nguyen ◽  
Quang The Nguyen
Keyword(s):  
Frequency Shift ◽  
High Speed ◽  
Second Harmonic ◽  
Phase Conjugation ◽  
Chromatic Dispersion ◽  
Optical Phase Conjugation ◽  
Actual System ◽  
Optical Phase ◽  
Nonlinear Compensation ◽  
The Impact

Nonlinear compensation using optical phase conjugation (OPC) have been considered a promising technique to increase the reach of high-speed fiber-optic transmission systems. OPC-based nonlinear compensation employs an optical phase conjugation located at a middle of the fiber link to generate a complexed conjugated signal with respect the signal in the first half of the link for propagation in the second half. OPC technique assumes a symmetry for signal propagating in the first and second half to obtain a perfect nonlinear and chromatic dispersion. However, as most of practical OPC schemes are realized by nonlinear effects such as four-wave mixing or a combination of second-harmonic generation and difference frequency generation, the frequency shift induced by OPC affects the signal symmetrical requirement for nonlinear compensation because the chromatic dispersion is different for the first and second half transmissions. In this paper, we investigate the impact of frequency shift on the nonlinear compensation using OPC for high symbol rate, high level modulation format signals. This will be important to understand the tolerance of the OPC techniques against such a practical condition for actual system implementations.

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