Noise Characteristics and Optimum Fiber Length of Spectral Inversion Using Four-Wave Mixing in a Dispersion-Shifted Fiber

1997 ◽  
Vol 3 (1) ◽  
pp. 28-43 ◽  
Author(s):  
Xiupu Zhang ◽  
Bo.F. Jørgensen
Keyword(s):  
Fiber Length ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Spectral Inversion ◽  
Noise Characteristics

Orthogonal Signals 100 km Transmission over Standard Fiber Using Mid-Span Spectral Inversion by Four-Wave Mixing in a Semiconductor Optical Amplifier

2009 ◽  
Vol 29 (3) ◽  
pp. 608-610
Author(s):  
王葵如 Wang Kuiru ◽  
刘博 Liu Bo ◽  
忻向军 Xin Xiangjun ◽  
张琦 Zhang Qi ◽  
马健新 Ma Jianxin ◽  
...  
Keyword(s):  
Semiconductor Optical Amplifier ◽  
Optical Amplifier ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Spectral Inversion

Physical Layer Impairment Model for CO-OFDM System Considering Amplified Spontaneous Emission and Four-wave Mixing

2015 ◽  
Vol 36 (3) ◽  
Author(s):  
Minglei Fu ◽  
Ke Meng ◽  
Zhicheng Chai ◽  
Yuling Liu ◽  
Zichun Le
Keyword(s):  
Spontaneous Emission ◽  
Fiber Length ◽  
Factor Versus ◽  
Four Wave Mixing ◽  
Physical Layer ◽  
Input Power ◽  
Wave Mixing ◽  
Q Factor ◽  
Ofdm System ◽  
Ofdm Signal

AbstractIt’s known that different physical impairments can occur in coherent optical orthogonal frequency division multiplexing (CO-OFDM) system. Not only linear impairments but also nonlinear impairments can cause significant signal degradations. It is important to analyze the physical layer impairment (PLI) model which should consider these impairments. In this paper, a new PLI model is developed, where amplified spontaneous emission (ASE) categorized to linear impairments and four-wave mixing (FWM) categorized to nonlinear impairments are regarded as the main noise sources. The performance of developed PLI model in terms of Q factor versus number of subcarriers and Q factor versus fiber length are extensively simulated. Numerical results show that when the OFDM signal passes through fiber link, the noise power expansion occurs. This expansion which is related to the fiber length, number of subcarriers as well as input power, can cause higher degradation in OFDM signal. Through precise analysis, optimum parameters of the transmission system can be chosen. Simulations prove that Q factor of CO-OFDM, whose number of subcarriers is 128, fiber length is 90 km and input power is −2 dBm, is up to abound 10 dB. In addition, in order to verify the developed PLI model, comparisons of the situation with and without considering FWM effects have also been made respectively. Results show that the performance of the model conforms to the actual conditions.

scholarly journals Investigation Of Dual-Pump Fiber Optical Parametric Amplifier Performance Driven by Energy Transfer Between Four-Wave Mixing Process

2021 ◽  
Vol 90 (1) ◽  
pp. 52-63
Author(s):  
K. G. Tay ◽  
Noran Azizan Cholan ◽  
Nurul Anati Othman
Keyword(s):  
Fiber Length ◽  
Four Wave Mixing ◽  
Parametric Amplifier ◽  
Optical Parametric Amplifier ◽  
Wave Mixing ◽  
Amplitude Equations ◽  
Central Wavelength ◽  
Optical Parametric ◽  
Fiber Optical ◽  
Fiber Optical Parametric Amplifier

Fiber optical parametric amplifier (FOPA) is operated based on energy transfer from pump waves to signal wave and at the end of the fiber, an idler wave is generated. This process is called four-wave mixing (FWM). Even though effects of higher-order dispersion coefficients, fiber length, fiber nonlinearity, fiber attenuation, pump powers, pump wavelength separation and distance of central pump wavelength with ZDW on gain profiles have been examined by previous researchers, but on different fiber or numerically studied using the Optisys system, analytical model or different amplitude equations. Thus, in this study, the above-mentioned parameters on the gain performance of dual pump fiber optical parametric amplifier (FOPA) using highly nonlinear shifted fiber (HNL-DSF) as a medium will be numerically investigated using ode45 function in Matlab. The gain at a certain wavelength can be obtained by solving 4 coupled amplitude equations with fiber loss and pump depletion that govern the four-wave mixing (FWM) process of pumps, signal and idler waves. Simulations results indicate positive gives poor or no gain, meanwhile, an addition of to negative widens the bandwidth, but there is no significant effect with the addition of . Besides, an increase of fiber length, nonlinearity and pump powers improve gain performance, but an increase of fiber loss decays the gain amplitude. Increment of pump separation will enhance flatness of gain at wavelength far from central wavelength but results in an increase of gain reduction at the central wavelength. Lastly, must be positive, not too small and not bigger than 1.125nm to get a high, broader and lesser ripples gain.

Impact of spectral inverter fiber length on four-wave mixing efficiency and signal distortion

1995 ◽  
Vol 13 (9) ◽  
pp. 1815-1819 ◽  
Author(s):  
P.O. Hedekvist ◽  
P.A. Andrekson ◽  
K. Bertilsson
Keyword(s):  
Fiber Length ◽  
Four Wave Mixing ◽  
Mixing Efficiency ◽  
Wave Mixing ◽  
Signal Distortion
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