Conduction system

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The Performance Analysis Fiber Optic Dispersion on OFDM-QAM System

Abstract : In this paper, We investigate post, pre and symmetrical/mix dispersion compensation methods for 40 Gb/s non-return to zero link using standard and dispersion compensated fiber through FBG compensator to optimize high data rate optical transmission. The influence of dispersion of FBG compensator and increases in the power of CW laser has been studied to evaluate the performance of optical communication systems. The simulation model of the WDM based on the Optisystem 11.0 is presented according to the above principle. The simulation results are validated by analysing the Q-factor and Bit error rate (BER) in the numerical simulator. It is found that post compensation performance is best and the input fiber power is taken as 5-10dB, the corresponding BER performance is better. Keywords - BER, Dispersion compensation, Q-factor, WDM.

Performance Analysis of Dispersion Compensation in Long Haul Optical Fiber wi...

IOSR Journals

IOSR Journal of Electronics and Communication Engineering(IOSR-JECE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of electronics and communication engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in electronics and communication engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.

Gain Analysis of EDF Amplifier Based WDM System Using Different Pumping Wavel...

iosrjce

Analog and digital modulation formats of optical fiber communication within a...

IAEME Publication

The need for larger capacities in long haul optical digital transmission lead to greater channel density which can be achieved by wavelength division multiplexing and increasing the bit rate of each channel. As data rates increases, certain phenomena such as dispersion began to show up as obstacles. At higher bit rates beyond 2.5Gbps polarization mode dispersion (PMD) becomes a main factor in the degradation of the transmission characteristics. PMD occurs when slightly different planes of light inside a fiber travel at slightly different speeds and make it impossible to transmit data reliably at high speed in single mode fibers. PMD is caused due to optical birefringence in the fiber due to which the two modes within a single mode fiber travel with different group velocities and the random change of this birefringence along the fiber length results in random coupling between the modes. This effect of PMD results in broadening of transmitted pulses that limit the transmission capacity of the fiber. In high-speed optical communication systems working at data rates of 10Gbps and beyond, signal distortion caused by PMD is also a major limitation of the transmission distance. This paper intends to analyze the performance of PMD compensation by optical compensation technique and using DCF in a two channel WDM system. The analysis is done through eye diagrams from which the Q value and bit error rate can be determined by simulating with OptSim5.3, which includes the latest simulation algorithms to guarantee the highest possible accuracy and real world results

Comparison of PMD Compensation in WDM Systems

IOSR Journals

In this paper we have designed and implemented an all optical tunable delay element using the combination of wavelength conversion and fiber dispersion. We present wavelength conversion method that show with FWM. The characteristics of the proposed all optical based techniques for tunable delay element are discussed theoretically and demonstrated experimentally. This element operates near 1550nm and generates delay time range is 2430ps. Pyae Phyo Swe | Tin Tin Ohn "Design and Implementation of All-Optical Tunable Delay by the Combination of Wavelength Conversion and Fiber Dispersion" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd27874.pdfPaper URL: https://www.ijtsrd.com/engineering/electrical-engineering/27874/design-and-implementation-of-all-optical-tunable-delay-by-the-combination-of-wavelength-conversion-and-fiber-dispersion/pyae-phyo-swe

Design and Implementation of All Optical Tunable Delay by the Combination of ...

ijtsrd

International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.

I41035057

IJERA Editor

Abstract This article covers optical power measurement of light signal in DWDM network and debugging of optical power as per the specifications of DWDM system with fix gain amplifier. The measurement and calculations of each component of DWDM system is discussed individually. Optical power of individual optical channel, aggregate optical power of multiplexed signals, relation with amplifier gain, insertion loss and attenuation on signal are the key factors involved in design and operation of DWDM system. From transmitter to receiver, the working performance of the DWDM system depends on the optical strength of input light signal should be as per specifications of its components. A description of input and output optical power of light signal of each DWDM component and its relationship is discussed. If there is any deviation as per specifications is observed, process to calculate deviation and debug is given with working example in this article. Keywords: Dense wavelength division multiplexing (DWDM), Optical MUX/DEMUX, Optical transmitters/receivers, Optical amplifiers, Optical Fiber, Optical power, Attenuation, Optical Power Debugging

Optical power debugging in dwdm system having fixed gain amplifiers

eSAT Journals

Extinction ratio and its effect on the nonlinearity in optical fiber networks...

Dr. Ved Nath Jha

One major drawback associated with an OFDM system is that the transmitter’s output signal may have a high peak-to-average ratio (PAPR). High levels of PAR may be a limiting factor for power line communication (PLC) where regulatory bodies have fixed the maximum amount of transmit power. To overcome this problem, many approaches have been presented in the literature. One potential solution for reducing the peak-to-average power ratio (PAPR) in an OFDM system is to utilize a constant envelope OFDM (CE-OFDM) system. This paper describes a CE-OFDM based modem for Power Line Communications (PLC) over the low voltage distribution network. The impact of the electrical appliances on the signal transmission is investigated. The good performances of the BER have been checked by the simulation platform of real PLC channel using Matlab. Finally, CE-OFDM-CPM is compared with conventional OFDM under HomePlug AV.

Performance Evaluation of CE-OFDM in PLC Channel

CSCJournals

P01062114120

IOSR Journals

Explosive growth of broadband multimedia applications, such as high-definition television (HDTV), video on demand (VOD) and interactive games imposed a huge demand for bandwidth on the access network. The potential bandwidth of optical communication system is driving force behind the worldwide development and deployment of light wave system but dispersion limits the system performance in terms of high speed optical communication. In this paper different dispersion compensation methods are discussed, which are based on Chirped Fiber Grating (CFG), Dispersion Compensation Fibers (DCF), Self Phase Modulation (SPM ) resulting from Kerr nonlinearity to overcome pulse broadening effect of Group Velocity Dispersion (GVD), which eventually have direct implication on the data transmission capability on optical fiber communication link.

Enhancing the Data Transmission Capability on Optical Fiber Communication Lin...

IOSRJECE

Disclosed is an optical fiber comprising a center core which forms a passageway for transmitting optical signals and has a refractive index N1, and a cladding which encloses the center core and has a refractive index N0. The optical fiber further comprises an upper core, which has a distribution of refractive indices increased starting from a refractive index N2 (>N0) at its outer circumference to the refractive index N1 at its internal circumference, and a minutely depressed refractive index region, which is interposed between said upper core and cladding and has a refractive index N3. The refractive index N3 is lower than the refractive index N0.

Dispersion Modified Optical Fiber

hassaanashraf1

In the distributed transmit antenna MIMO OFDM system, each transmitting antenna has different frequency offset between each transmitting antenna and receiver due to the use of independent crystal oscillator. This paper proposes Polynomial-time algorithm for correcting the frequency offset in a received signal by maximizing the conditional average signal. The algorithm focus on reducing to interference and noise ratio of each subcarrier on the receiving antenna by frequency offset. The simulation result shows the performance of the proposed algorithm is slightly improved compared with the existing frequency offset correction algorithm, and the complexity is reduced by 50% or more.

Minimize MIMO OFDM interference and noise ratio using polynomial-time algorit...

IJECEIAES

What's hot (14)

The Performance Analysis Fiber Optic Dispersion on OFDM-QAM System

Performance Analysis of Dispersion Compensation in Long Haul Optical Fiber wi...

Gain Analysis of EDF Amplifier Based WDM System Using Different Pumping Wavel...

Analog and digital modulation formats of optical fiber communication within a...

Comparison of PMD Compensation in WDM Systems

Design and Implementation of All Optical Tunable Delay by the Combination of ...

I41035057

Optical power debugging in dwdm system having fixed gain amplifiers

Extinction ratio and its effect on the nonlinearity in optical fiber networks...

Performance Evaluation of CE-OFDM in PLC Channel

P01062114120

Enhancing the Data Transmission Capability on Optical Fiber Communication Lin...

Dispersion Modified Optical Fiber

Minimize MIMO OFDM interference and noise ratio using polynomial-time algorit...

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