scholarly journals Michelson interferometer system with acoustic optic filter and fiber Bragg grating for reduction of four-wave mixing

2019 ◽  
Vol 15 (7) ◽  
Author(s):  
Fabio Barros De Sousa ◽  
Jorge Everaldo De Oliveira ◽  
Fiterlinge Martins De Sousa ◽  
Marcio Benedito Caldas Costa ◽  
Osmar Tharlles Borges De Oliveira ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Performance Metrics ◽  
Michelson Interferometer ◽  
Single Mode ◽  
Four Wave Mixing ◽  
Optical Signal ◽  
Input Power ◽  
Bragg Grating ◽  
Wave Mixing ◽  
Q Factor

In this paper a simplified design and efficient of a Michelson Interferometer (MI) system is presented, capable of reducing the Four-Wave Mixing (FWM) effects, using fiber Bragg grating and acoustic optic filter (FBG and AOF) with the aid of a highly non-linear photonic crystal fiber (HNL-PCF). The analysis of the MI system based in FBG and AOF was performed according to the effect of fiber length and input power by performance metrics: Optical Spectrum, maximum Quality factor (max. Q-factor), minimum bit error rate (min. BER), eye height, optical signal-to-noise ratio (OSNR) and timing jitter. The numerical simulation results showed that the MI system with FBG and AOF maintained a good signal performance, with Q-factor equal to 33.3 even after 100 km of single mode fiber (SMF) and with downstream signal power by up to 10 dBm.

scholarly journals Four-Wave Mixing Crosstalk Suppression Based on the Pairing Combinations of Differently Linear-Polarized Optical Signals

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Haider Abd ◽  
Norashidah Md. Din ◽  
M. H. Al-Mansoori ◽  
F. Abdullah ◽  
H. A. Fadhil
Keyword(s):  
Single Mode ◽  
Four Wave Mixing ◽  
Input Power ◽  
Single Mode Fiber ◽  
Error Rates ◽  
Wave Mixing ◽  
Channel System ◽  
New Approach ◽  
Optical Signals ◽  
Total Data

A new approach to suppressing the four-wave mixing (FWM) crosstalk by using the pairing combinations of differently linear-polarized optical signals was investigated. The simulation was conducted using a four-channel system, and the total data rate was 40 Gb/s. A comparative study on the suppression of FWM for existing and suggested techniques was conducted by varying the input power from 2 dBm to 14 dBm. The robustness of the proposed technique was examined with two types of optical fiber, namely, single-mode fiber (SMF) and dispersion-shifted fiber (DSF). The FWM power drastically reduced to less than −68 and −25 dBm at an input power of 14 dBm, when the polarization technique was conducted for SMF and DSF, respectively. With the conventional method, the FWM powers were, respectively, −56 and −20 dBm. The system performance greatly improved with the proposed polarization approach, where the bit error rates (BERs) at the first channel were2.57×10-40and3.47×10-29at received powers of −4.90 and −13.84 dBm for SMF and DSF, respectively.

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 Performance Analysis of an Optical System Using Dispersion Compensation Fiber & Linearly Chirped Apodized Fiber Bragg Grating

2016 ◽  
Vol 3 (1) ◽  
pp. 114-121 ◽  
Author(s):  
Vibha Joshi ◽  
Rekha Mehra
Keyword(s):  
Fiber Bragg Grating ◽  
Optical System ◽  
Dispersion Compensation ◽  
Power Distance ◽  
Input Power ◽  
Bragg Grating ◽  
Q Factor ◽  
Rate Performance ◽  
Eye Diagram ◽  
Dispersion Compensation Fiber

In this paper, a proposal for analyzing the performance of an optical system by using dispersion compensation fiber (DCF) and linear chirped apodized fiber Bragg grating (FBG) has been put forth. Both systems have three different schemes pre, post and symmetrical. Various parameters used for this analysis are input power, distance & input bit rate. Performance is analyzed in terms of Q factor, Bit Error Rate (BER) and Eye Diagram. It is found that use of FBG as a dispersion compensating element gives better system performance as compared to DCF.

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