scholarly journals Comparative Analysis of DCF based Dispersion Compensation Techniques in Optical Fiber Communication Link using Different Input Transmitter Conditions at 10 Gbps

2021 ◽  
Vol 12 (3) ◽  
pp. 3210-3226
Author(s):  
Gaurav Sharma Et.al
Keyword(s):  
Laser Power ◽  
Dispersion Compensation ◽  
Input Sequence ◽  
Optical Fiber Communication ◽  
Communication Link ◽  
Q Factor ◽  
Modulation Format ◽  
Transmission Distance ◽  
Cw Laser ◽  
Walsh Code

In this paper, Dispersion Compensating Fiber (DCF) based various dispersion compensating techniques (pre, post and symmetrical) with different modulation format like Non Return to Zero(NRZ), Return to Zero(RZ), Carrier Suppressed Return to Zero(CSRZ) and Duo Binary(DB) along with PN, FCC and Walsh code input sequences are implemented. Simulation and analysis of these implemented techniques were done at 10 Gbps bit rate and input laser power ranging from 1 mW to 10 mW at transmission distance of 240 km using BER Analyzer in Optisystem 17.0 software. Comparison between different techniques was done in terms of Q factor and BER versus input CW laser power for different modulations and input sequences. From the analysis, it is concluded that when Walsh code as user defined input sequence are used for all the implementation, it gives higher value of Q factor and lower value of Bit Error Rate as compared to PN and FCC codes for most of the input CW laser power.

Analysis of hybrid integrated-alternate mark inversion (I-AMI) modulation and symmetrical-symmetrical-post (SSP) dispersion compensation technique in single-tone radio over fiber (RoF) system

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Namita Kathpal ◽  
Amit Kumar Garg
Keyword(s):  
Dispersion Compensation ◽  
Chromatic Dispersion ◽  
High Capacity ◽  
Radio Over Fiber ◽  
Q Factor ◽  
Bit Rate ◽  
Eye Diagram ◽  
Single Tone ◽  
Transmission Distance ◽  
Compensation Technique

AbstractThis paper presents the high capacity single-tone Radio over Fiber (RoF) system utilizing advanced modulation technique in conjunction with optimized dispersion compensation scheme to support the high data rate transmission upto 120 Gbps. The proposed system incorporates the Integrated-Alternate Mark Inversion (I-AMI) modulation and Symmetrical-Symmetrical-Post (SSP) compensation technique to enhance the spectral efficiency as well as to reduce the chromatic dispersion effects in long-haul RoF link. The proposed system i.e., I-AMI with SSP has been examined at 60, 80, 100 and 120 Gbps bit rate for various transmission distance. The simulation results obtained in terms of Q-factor, Bit Error Rate (BER) and eye diagram reveal that the proposed system provides wider eye-opening, low BER and high Q-factor as compared to the existing system. The proposed I-AMI with SSP provides the Q-factor of 30.47 whereas the I-AMI with PSP and AMI with SSP provides the Q-factor of 18.77 and 18.40 respectively at 80 Gbps bit rate over a transmission distance of 800 km.

scholarly journals Turbo-coded Ultra Long Haul System with Probabilistic Shaped 16QAM Modulation

2021 ◽  
Vol 2112 (1) ◽  
pp. 012027
Author(s):  
Ziqi Wang ◽  
Yuzhe Li ◽  
Yuan Gao ◽  
Xishuo Wang ◽  
Qi Zhang
Keyword(s):  
Communication Technology ◽  
Mobile Communication ◽  
High Speed ◽  
Turbo Code ◽  
Optical Fiber Communication ◽  
Modulation Scheme ◽  
Modulation Format ◽  
Transmission Distance ◽  
Bit Error Ratio ◽  
Mobile Communication Technology

Abstract With the rapid growth and development of 5G (5th Generation Mobile Communication Technology) and the incoming of 6G (6th Generation Mobile Communication Technology), the demand for high-speed and flexible communication solutions is becoming far more urgent. Within this paper, a novel code modulation scheme based on PS (probabilistic shaping) and Turbo code is proposed with its effectiveness is confirmed by the results of simulation. The results inform that in an optical fiber communication system with 56 Gb/s rate and 3000 km transmission distance, when the SNR (signal-noise ratio) is greater than 3.5 dB, the Turbo-coded PS-16QAM modulation format can achieve reliable transmission. The proposed scheme performs the best in BER (bit error ratio) and average launch power in the four cases of uniform 16QAM, PS-16QAM, Turbo-coded 16QAM with and itself. The proposed scheme is a potential solution in the future 5G communication.

COMBATTING NONLINEAR DISTORTION IN OPTICAL FIBRE TRANSMISSION SYSTEMS BY OPTIMUM DISPERSION COMPENSATION AND MODULATION FORMAT

2000 ◽  
Vol 09 (02) ◽  
pp. 227-234
Author(s):  
ARNE RØYSET ◽  
DAG ROAR HJELME
Keyword(s):  
Optical Fibre ◽  
Communication Systems ◽  
Dispersion Compensation ◽  
Design Guidelines ◽  
Optical Nonlinearities ◽  
Power Budget ◽  
Transmission Systems ◽  
Modulation Format ◽  
Transmission Distance ◽  
Optical Fibre Transmission

The use of optical amplifiers in optical fibre communication systems has led to a situation where optical nonlinearities has become a major system limitation in long repeaterless high bitrate transmission systems. In this paper we present results from numerical studies of the interaction between dispersion and self phase modulation in 10–40 Gbit/s systems and presents design guidelines for such systems. We have found that optimised dispersion compensation can reduce the distortion caused by optical nonlinearities, hence allowing higher power levels in the fibre and thereby increasing the power budget and transmission distance.

Performance Evaluation of Passive Optical Network Using Different Modulation Formats

2016 ◽  
Vol 37 (4) ◽  
Author(s):  
Ravneet Kaur ◽  
Sanjeev Dewra
Keyword(s):  
Performance Evaluation ◽  
Optical Network ◽  
Passive Optical Network ◽  
Q Factor ◽  
Bit Rate ◽  
Modulation Formats ◽  
Modulation Format ◽  
Transmission Distance ◽  
Received Power ◽  
Maximum Transmission

AbstractIn this paper, the performance of passive optical network is analyzed and compared for different modulation formats such as non-return to zero (NRZ), return to zero (RZ) at 2.5 Gb/s bit rate with 16 optical network units. This system is investigated in terms of quality (Q)-factor, optical received power and eye height at different transmission distances. NRZ achieves maximum transmission distance up to 48 km having Q-factor of 6.18 and RZ achieves the maximum transmission distance up to 41 km having Q-factor of 6.21. Furthermore, it is found that NRZ modulation format is more superior and covers more distance as compared to RZ modulation format.

Analysis three dispersion compensation techniques using DCF

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Saliha Kheris ◽  
Badra Bouabdallah
Keyword(s):  
Optical Fiber ◽  
Communication Systems ◽  
Dispersion Compensation ◽  
Optical Fiber Communication ◽  
Laser Frequency ◽  
Fiber Communication ◽  
Low Bit Rate ◽  
Transmission Distance ◽  
Pulse Broadening ◽  
Better Than

Abstract Dispersion is one of the very important parameters that effect on the performance of optical fiber communication systems. It causes pulse broadening, limiting of transmission distance and low bit rate. Dispersion compensation fiber (DCF) is widespread used in the dispersion compensation scheme. In this paper, the suggested DCF included (pre–post-symmetrical) schemes with various bit rates (10–60 Gbit/s), and the positive dispersion accumulated over the length of the fiber at 100 km of optical fiber with 21.25 km of DCF. Optisystem software version 7 is used to design simulation model. The performances have been compared on the basis of parameters such as Q factor, bit error rate (BER) and eye height which used to evaluate the performance analysis of the system. We concluded that the symmetrical compensation techniques are better than the other compensation schemes when the Q factor is 14.9536 and BER is 1.759842.10−0.22, these at 60 Gbit/s and the input cw laser frequency equal 193.1 THz.

scholarly journals Investigation on Maximum Available Reach for Different Modulation Formats in WDM-PON Systems

2016 ◽  
Vol 53 (4) ◽  
pp. 66-75 ◽  
Author(s):  
I. Kurbatska ◽  
V. Bobrovs ◽  
S. Spolitis ◽  
P. Gavars ◽  
G. Ivanovs ◽  
...  
Keyword(s):  
Dispersion Compensation ◽  
Software Tool ◽  
Transmission Systems ◽  
Modulation Formats ◽  
Differential Phase Shift ◽  
Modulation Format ◽  
Differential Phase Shift Keying ◽  
Transmission Distance ◽  
Shift Keying ◽  
Optical Transmission Systems

Abstract Considering the growing demand for broadband of access networks, in the present paper we investigate various modulation formats as a way of increasing the performance of optical transmission systems. Non-return-to-zero (NRZ) on-off keying, return-to-zero (RZ) OOK, carrier suppressed RZ (CSRZ) OOK, duobinary (DB), NRZ differential phase shift keying (NRZDPSK), RZ-DPSK and CSRZ-DPSK formats are compared using the maximal achievable reach with bit error rate less than 10−9 as a criterion. Simulations are performed by using OptSim software tool. It is shown that using the transmission system without dispersion compensation the best results are shown by duobinary and CSRZ-OOK modulation formats, but with the system using dispersion compensating fiber (DCF) the longest transmission distance is achieved by RZ-DPSK modulation format. By investigating the influence of channel spacing for best-performed modulation formats, network reach decrease for transmission systems with DCF fiber has been observed due to channel crosstalk.

40 Gb/s High-speed mode-division multiplexing transmission employing NRZ modulation format

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Rabiu Imam Sabitu ◽  
Nafizah Goriman Khan ◽  
Amin Malekmohammadi
Keyword(s):  
System Performance ◽  
High Speed ◽  
Direct Detection ◽  
Signal To Noise Ratio ◽  
Optical Signal ◽  
Threshold Power ◽  
Modulation Format ◽  
Transmission Distance ◽  
Mode Division Multiplexing ◽  
Speed Mode

AbstractThis report examines the performance of a high-speed MDM transmission system supporting four nondegenerate spatial modes at 10 Gb/s. The analysis adopts the NRZ modulation format to evaluate the system performance in terms of a minimum power required (PN) and the nonlinear threshold power (PTH) at a BER of 10−9. The receiver sensitivity, optical signal-to-noise ratio, and the maximum transmission distance were investigated using the direct detection by employing a multimode erbium-doped amplifier (MM-EDFA). It was found that by properly optimizing the MM-EDFA, the system performance can significantly be improved.

Optical Networks Performance Optimization Based on Hybrid Configurations of Optical Fiber Amplifiers and Optical Receivers

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
I. S. Amiri ◽  
Fatma Mohammed Aref Mahmoud Houssien ◽  
Ahmed Nabih Zaki Rashed ◽  
Abd El-Naser A. Mohammed
Keyword(s):  
Optical Fiber ◽  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Performance Optimization ◽  
Input Power ◽  
Fiber Amplifiers ◽  
Q Factor ◽  
Wavelength Division ◽  
Transmission Distance ◽  
Optical Fiber Amplifiers

AbstractThe 16-channels dense wavelength division multiplexing (DWDM) systems have been optimized by utilizing hybrid configurations of conventional optical fiber amplifiers (EDFA, RAMAN and SOA) and optical photodetectors (PIN, APD(Si) and APD(InGaAs)). The DWDM systems were implemented for 5 Gb/s channel speed using one of these configurations with 100 GHz channel spacing and 25 km amplifying section. The hybrid configurations are the combinations of (PIN + EDFA), (PIN + RAMAN), (PIN + SOA), (APD(Si) + EDFA), (APD(Si) + RAMAN), (APD(Si) + SOA), (APD(InGaAs) + EDFA), (APD(InGaAs) + RAMAN) and (APD(InGaAs) + SOA). Based on BER, Q-factor and eye diagrams, the performance was compared for these configurations under influences of various thermal noise levels of photodetectors over different fiber lengths ranging from 25 km up to 150 km. The results revealed that both APD structures give optimum performance at input power Pin = 5 dBm due to high internal avalanche gain. EDFA outperforms RAMAN and SOA amplifiers. SOA amplifier shows degraded performance because of nonlinearity effects induced. RAMAN amplifier seems to be the best alternative for long reach DWDM systems because it minimizes the effects of fiber nonlinearities. The configuration (APD(Si) + EDFA) is the most efficient and recommended to be used for transmission distance beyond 100 km due to its larger Q-factor.

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