Pdf dispersion compensation in optical fiber communication. Fibers dcf, dispersion compensating arrayed waveguides. In addition to these characteristics, dcf should have large chromatic dispersion. To achieve a smaller equipment size, compact design of tributary circuits is the most effective technique, since the number of racks for these circuits makes up a considerable proportion in the total of slte for longdistance dense wdm systems. Even though mmf today corrects for modal dispersion, mmf is used typically for short distances because the modes will still have a tendency to separate over longer lengths regardless of the modal dispersion compensation. Precompensation, postcompensation and symmetric compensation are used in simulation, and. Dispersion management is a critical design criterion that characterizes the performance of an optical network, and has impacted almost every aspect of the physical layer of an optical transmission lin. One issue with the dispersion map based on nzdsf and a positive dispersion fiber pdf is that the slopes of both fibers are positive, making dispersion compensation at other wavelengths impossible unless the wdm signals channels are demultiplexed and compensated individually through different lengths of dcf. Turitsyn dl d technische universifiit berlin fachbereich 12. Optimal schemes for dispersion compensation of standard monomode fiber based links d.
Chromatic dispersion compensation in superpon networks. Chromatic dispersion compensation in superpon networks with. Dispersion compensation is an important issue for fiber optic links, i. Dispersion managed fiber dmf designs were introduced where the dispersion slope was also compensated. Request pdf fiberbased tunable dispersion compensation tunable dispersion has been implemented in various technology platforms, including fiber gratings, planar waveguides, thin film etalons. Tunable dispersion has been implemented in various technology platforms, including fiber gratings, planar waveguides, thin film etalons, and bulk optic technologies. An improved methodology for dispersion compensation and. A dispersion compensated fiber is used before the smf. Effort directed to a suitable dispersion compensation fiber dcf has culminated in a fiber of the needed negative sign of dispersion, and a dispersion of magnitude several e. Allfiber spectral filters based on lp01 lp11 mode coupling and applications in wavelength division multiplexing and dispersion compensation by jyothikumar jagannathan committee chairman. Fiberbased tunable dispersion compensation springerlink. The dcm modules are available with any dispersion values from 20km to 120km compensation distance, and can be used both for single channel and multi channels dwdm optical fiber communication systems. In solitonbased transmission systems the nonlinearity is balanced by dispersion. Simulation setup optical fiber communication is implemented on optisystem11.
Ramachandrans research focuses on fiber and fibergrating devices in specialty, dispersiontailored fibers. If youre looking for a free download links of fiber based dispersion compensation optical and fiber communications reports pdf, epub, docx and torrent then this site is not for you. Allfiber spectral filters based on lp mode coupling. Photonic crystal fiber for dispersion compensation. Optimal schemes for dispersion compensation of standard. A hilberttransformbased broadband chromatic dispersion cd compensation scheme for radiooverfiber links is proposed and experimentally demonstrated.
The dispersion compensating fiber dcf is tested for a single span, single channel. Dcf has become a most useful method of dispersion compensation and has been extensively studied. Applications compensation of dispersionbroadening in longhaul communication in fbg. Low loss chromatic dispersion emulators and compensators available for lab use.
Use of dispersion compensating fiber in optical transmission. In view of optical properties for transmission system, production cost, and module assembly, for a long time slope compensating and dispersion compensating fiber scdcf has been the most advantageous and widely used method as dispersion compensation devices. It starts with an exposition on the fundamental physics underlying dispersion and its effects on optical pulses, followed by at least one chapter devoted to each of the fiber based dispersion compensating devices that have either been deployed or are considered as serious candidates for future networks. In soliton based transmission systems the nonlinearity is balanced by dispersion. Osa angleadjustmentbased tunable chirped mirrors with. Rp photonics encyclopedia dispersion compensation, pulse. Oct 08, 2016 applications compensation of dispersion broadening in longhaul communication in fbg. Dispersion slope compensation module dcm based on dispersion slope compensating fiber in module package, special for g. He was the technicallead as well as team leader for lucent technologies efforts in defining nextgeneration dispersioncompensation solutions for future 40 gbs optical communications systems. Performance analysis of dispersion compensation in long haul.
Chromatic dispersion an overview sciencedirect topics. Fbgbased, multichannel chromatic dispersion compensators 4 key characteristics 10 km 20 km 30 km 40 km cf length m 1 000 1 460 2 000 2 920 3 4 380 4 000 5 840 latency. Pdf symmetrical dispersion compensation for standard. Offers the first detailed reference book on dispersion compensating fibers. We report the feasibility of continuously tunable dispersion control with chirped mirrors cms. Our prototype dispersion tunable cm makes it possible to provide continuous dispersion support, advancing the cm technique to a new level by overcoming the drawback of the discrete dispersion compensation nature of. It depends on the fiber type, and it limits the bit rate or the transmission distance for a good quality of service. Symmetrical dispersion compensation for standard monomode.
A dispersion compensating photonic crystal fiber dcpcf with ultrahigh chromatic dispersion coefficient and extremely low confinement loss based on a hybrid structure of dualconcentric core. A study of dispersion compensation of polarization multiplexingbased ofdmocdma for radiooverfiber transmissions chihta yen and wenbin chen department of electrical engineering, national formosa university, yunlin county 632, taiwan. Fiber based dispersion compensation siddharth ramachandran. Ofs is also a leader in dispersion compensation technology.
Fiber dispersion and optical dispersion an overview. It starts with an exposition on the fundamental physics underlying dispersion and its effects on optical pulses, followed by at least one chapter devoted to each of the fiberbased dispersioncompensating devices that have either been deployed or are considered as serious candidates for future networks. Finally, the influence of the nonlinear effects in pulse propagation of optical fiber systems is presented and analyzed. To reduce fiber dispersion, new types of fiber were invented, including dispersion shifted fibers itu g.
Fiber based dispersion compensation optical and fiber. Performance analysis of dwdm based fiber optic communication with. Optimization of fiber based dispersion compensation in rz and nrz data 653 journal of engineering science and technology december 2011, vol. By simulating a model of communication system and using the most suitable settings of the system which include input power dbm. This paper will focus on fiber grating based tunable dispersion compensation, because fiber gratings are at present one of the best developed tdc technologies available. Pulses experience anomalous dispersion in the entire 1. Performance evaluation of dwdm for radio over fiber system. Broadband dynamic dispersion compensation in nonlinear fiber.
It is based on realistic optical fibermodeling as a. Paper open access simulation study of dispersion compensation. Under special circumstances it is possible the propagation of solitons. Here, the dispersion was managed within the span, by allocating two types of fiber. We have analyzed the dispersion compensation using fiber bragg grating at different fiber lengths, the simulated transmission system have been analyzed on the basic of different parameters. Osa broadband chromaticdispersioninduced powerfading. The idea of using dispersion compensation fiber for dispersion compensation was proposed as early as in 1980 but, until after the invention of optical amplifiers, dcf began to be widespread attention and study. Broadband dynamic dispersion compensation in nonlinear fiberbased device article pdf available in journal of lightwave technology 221. Safaaijazi electrical engineering abstract all fiber spectral filters have the advantages of providing low coupling loss and being readily. Dispersion compensation with a grism based dispersive line for fiber delivery of sub30 fs pulses at 830 nm. For stable soliton transmission, however, specific. The equivalent effective area and fom formalism can also be applied to dispersionmanaged fibers in which the first fiber is a positive dispersion fiber pdf with a large effective area and the second fiber is a dcf.
Fiber dispersion and optical dispersion an overview fosco. The chromatic dispersion of a fiber is expressed in psnmkm, representing the differential delay, or time spreading in ps, for a source with a spectral width of 1 nm traveling on 1 km of the fiber. Fiber based tunable dispersion compensation springerlink. An improved methodology for dispersion compensation is discussed in this work, which offers much better performance compared to fbg compensation in long haul optical fiber networks.
Miniature highsensitivity hightemperature fiber sensor. A study of dispersion compensation of polarization multiplexing based ofdmocdma for radioover fiber transmissions chihta yen and wenbin chen department of electrical engineering, national formosa university, yunlin county 632, taiwan. The rp photonics buyers guide contains 20 suppliers for dispersion compensation modules. Different dispersion compensation techniques in fiber optic. Dispersion compensation using highpositive dispersive. Miniature highsensitivity hightemperature fiber sensor with a dispersion compensation fiber based interferometer bo dong,1, li wei,1,2 and dapeng zhou2 1department of physics and computer science, wilfrid laurier university, waterloo. Safaaijazi electrical engineering abstract allfiber spectral filters have the advantages of providing low coupling loss and being readily. Singlemode optical fiber is good for long runs in data centers, for example, from the data center. This paper will focus on fiber grating based tunable dispersion compensation, because fiber gratings are at present one of the best developed tdc. How does a dispersion compensating fiber reduce chromatic.
Dispersion management is the process to design the fiber and compensating elements in the transmission path to keep the total dispersion to a small number. A study of dispersion compensation of polarization. All fiber spectral filters based on lp01 lp11 mode coupling and applications in wavelength division multiplexing and dispersion compensation by jyothikumar jagannathan committee chairman. Dispersion compensation an overview sciencedirect topics. Applications are in the fields of light wave communications and optical fiber sensors which are based on the existence of photosensitivity in silica. Symmetrical dispersion compensation for standard monomodefiberbased communication systems with large amplifier spacing. We have analyzed the dispersion compensation using fiber bragg grating at. Using ofs commercial dispersion compensation modules, the residual dispersion of truewave rs lwp fiber can be as low as 0. Dispersion management is a critical design criterion that characterizes the performance of an optical network, and has impacted almost every aspect of the physical layer of an optical transmission line. As dispersion compensation fiber is now gone, thanks to the progress of nonlinear mitigation in dsp, the constraint to reduce the footprint is now directly focused on compact design of tributaries. Performance evaluation of dwdm for radio over fiber.
Research on dispersion compensation technology using chirped fiber bragg gratingj. Pdf dispersion compensation with a grismbased dispersive. Jan 19, 2007 tunable dispersion has been implemented in various technology platforms, including fiber gratings, planar waveguides, thin film etalons, and bulk optic technologies. Pdf this paper discussed on a simulation of optical transmission system in optical fiber. Static and tunable dispersion compensation modules for access, dci and legacy communication systems.
The first type spliced to the repeater output is a large effective area fiber with positive dispersion. Our prototype dispersiontunable cm makes it possible to provide continuous dispersion support, advancing the cm technique to a new level by overcoming the drawback of the discrete dispersion. Dispersion compensation techniques for optical fiber. In this paper, optical fiber communication system with dispersion compensation is built based on optisystem simulation software, and fbg is used to improve the transmission performance of the system.
Fiberbased tunable dispersion compensation request pdf. The ape femtocontrol is a compact motorized dispersion. A hilberttransform based broadband chromatic dispersion cd compensation scheme for radioover fiber links is proposed and experimentally demonstrated. A dispersion compensating module or dcm is used to compensate the cumulative dispersion in a single mode fiber and a dispersion coefficient is used to characterize the dispersion value. As a consequence of its optical characteristics, the chromatic dispersion of a fiber can be changed by acting on the physical properties of the material. Pulses in silica fiber experience normal chromatic dispersion below the zerodispersion wavelength, which is around 1. For dispersionshifted fiber, the dispersion zero lies in the 1. Here, strong dispersive broadening of modulated signals can occur in cases with high data rates. In the absence of such a specification, the chromatic dispersion characteristics can, and often do, vary greatly from transceiver to. Symmetrical dispersion compensation for standard monomode fiber based communication systems with large amplifier spacing.
The dispersion compensating fiber uses an all optical technique, fiber based solution to compensate the fiber gvd completely if the. How a dispersion compensating module reduces chromatic dispersion. Performance analysis of dispersion compensation using fiber. By constructing a hilbert transform path, cdinduced phase shifts, which initially lead to periodic power fading of the output rf signals, are transferred to the phases of the rf signals. Return and non return to zero modulation format,q factor. Microwave and millimeter wave frequency application in apf. The concept of tunable secondorder and higherorder dispersion is also proposed. In this paper we report on the design, numerical simulation and experimental testing of a novel dynamic dispersion compensation device based on selfphase modulation spm in nonlinear fiber. Miniature highsensitivity hightemperature fiber sensor with. No matter what your link dispersion looks like there is a solution with our continuous fbg dcms.
Dispersion compensation with a grismbased dispersive line for fiber delivery of sub30 fs pulses at 830 nm. It has been appreciated for some time that the bitrate limiting effect of chromatic dispersion, a linear effect, could be compensated by series connection with fiber of opposite sign of dispersion, see all optical fiberbased 1550 nm dispersion compensating in a 10 gbits, 150 km transmission experiment over 10 nm optimized fiber, j. Performance analysis of photoelectric dispersion compensation technology based on optisystemj. Performance analysis of dispersion compensation in long. Typically, dispersion compensating elements are placed every 100 km or so. Miniature highsensitivity hightemperature fiber sensor with a dispersion compensation fiberbased interferometer bo dong,1, li wei,1,2 and dapeng zhou2 1department of physics and computer science, wilfrid laurier university, waterloo, ontario n2l 3c5, canada.