The amplifier is based on erbium doped fiber, and can be incorporated directly into an optical network, avoiding the need to convert optical signals to electrical signals for amplification and re. Pdf a new erbiumdoped fibre amplifier edfa is demonstrated using a combination of newly developed erbium. Erbiumdoped fiber amplifier article about erbiumdoped. Bibliography includes bibliographical references p. What is the abbreviation for erbiumdoped fiber amplifier. The most common example is the erbium doped fiber amplifier edfa, where the.
Design and development of erbium doped fiber amplifiers. Several parameter sets are included, each of which represents a commercially available type of erbium doped fiber used in different kinds of amplifiers e. Written by one of the pioneers in the field, this unique reference provides researchers, engineers, and system designers with detailed. Purchase erbium doped fiber amplifiers 1st edition. By cooling the fiber to 77 k, the amplifier gain is. The user can vary, via windows based input screens, various amplifier characteristics such as fiber length, pump power, signal power, and additional. Performance analysis of erbium doped fiber amplifiers and. Pp ap here are some typical numbers for the raman amp. Eindhoven university of technology master an optical amplifier.
Brief introduction to edfa erbium doped fiber amplifier. Moreover, as it works in the same optical domain, it avoids the need for several stages of signal conversion with their associated problems. Erbiumdoped fiber amplifier are being utilized as a part of scientific and medical applications to satisfy the prerequisite for interchanges. Being a renowned and the highly trusted enterprises in this industry, we are offering an optimum quality assortment of erbium doped fiber amplifier.
Fixedpoint realisation of erbium doped fibre amplifier. Since its introduction in the 1980s, the edfa has contributed significantly to the success of wavelength division multiplexing wdm technology 3. A description is made of the basic physics and characteristics of erbiumdoped fibers amplifiers edfas. Erbiumdoped fiber amplifiers, device and system developments. Pdf analysis of erbium doped fibre amplifiers haldun. Erbiumdoped fiber amplifiers are fiber amplifiers based on erbiumdoped optical.
In the last case, there are two levels in the light generation. The ddfa 1550xlr series of erbium doped fiber amplifiers are one of the most advanced catv edfas in the world. All discbased content for this title is now available on the web. Erbiumdoped fiber amplifiers are traditionally pumped with either 980 nm or 1480 nm laser diodes, which correspond to exciting 11 2 4i and 2 4i levels respectively. Edfa abbreviation stands for erbium doped fiber amplifier. Erbium doped fiber amplifier, 160265, rs 65000 piece aktel. The influence of the amplified spontaneous emission on the optimum cutoff wavelength for the lp11mode of. Fiber lasers, pm amplifiers edf50 pm 27281 a pm fiber with absorption of 50 dbm at 1530 nm. Rp photonics encyclopedia erbiumdoped fiber amplifiers. Arrays of such lasers are also attractive for beam combining to achieve even. Jan 14, 2016 este video mostra uma animacao do funcionamento do amplificador otico edfa em portugues. An edfa, also called optical amplifier or an erbiumdoped fiber amplifier or erbium amplifier, is an optical or ir infrared radiation repeater that amplifies a modulated laser beam directly, without optoelectronic and electrooptical conversion.
The scope of this paper is to analyze the output signal power with pump power and length variation in cascaded edfa simulation model performance. For the erbium doped fibre amplifier the population inversion parameters are related to the absorption and. The term doping refers to the process of using chemical elements to facilitate results. Flatgain wideband erbium doped fiber amplifier by combining. Edfa abbreviation stands for erbiumdoped fiber amplifier. It is shown that when the wavelength of the seed light varies from 1520 to 1570 nm, the gain at 1610 nm reaches maximum near 1553 nm and increases as the seed light power. Azooz department of electrical engineering, faculty of engineering, university of malaya. Erbium doped fibre amplifier edfa is an optical amplifier that amplifies optical signals sufficiently enough to cover several tens of kilometers without any need for conventional repeaters. An amplifier is used to boost optical signals to higher power, often used both at launch and within a signal network to maintain a high signal power.
Erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of longrange optical fiber communications. Characterization of a highpower erbiumdoped fiber laser. Osa highgain erbiumdoped travelingwave fiber amplifier. Figure 5 amplified spontaneous emission ase spectrum of erbiumdoped fiber pumped by a 974 nm laser diode 4. Erbium doped fibre amplifier edfa erbium doped fibre amplifier has turned out to be especially well suited. An optical fiber amplifier whose fiber core is lightly doped with trivalent erbium ions which absorb light at pump wavelengths of 0. Edfa erbium doped fiber amplifier tutorial exfiber optical technologies co. Erbium fiber amplifiers is a comprehensive introduction to the increasingly important topic of optical amplification.
Its core is the erbiumdoped optical fiber, which is typically a singlemode fiber. Erbium doped fiber amplifier cgbefapm series, polarization. Optimization tool for erbium doped fibre amplifiers electrical and. Two bands have developed in the third transmission window the conventional, or cband, from approximately 1525 nm 1565 nm, and the long, or lband, from. The spectroscopic features and laser properties of erbiumdoped silica glass are outlined first,followed by a description of the gain and saturation characteristics of. Gain equalization of erbium doped fibre amplifiers with. Output signal power analysis in erbiumdoped fiber amplifier. This amplifier consists simply of a piece of dualcore fibre with one core doped with erbium and the other undoped. A compromise can be made by combining the co and counterpropagating. Raman amplifier gain equations gr is called the raman gain coefficient units of mw. The pump current of the erbiumdoped fiber amplifier is adjustable through the instruments front panel, allowing the user to vary the gain and output power of the amplifier.
Doped fiber amplifiers dfas are optical amplifiers that use a doped optical fiber as a gain medium to amplify an optical signal. Erbium doped fiber amplifiers is a bonafide work done by mr. One is the cband conventional band which occupies the spectrum from 1530 nm to 1560 nm and the second is lband long wavelength band which occupies the spectrum ranging from 1560 nm to 1610 nm. Lecture erbium doped fiber amplifiers edfa notes edurev.
Wavelength division multiplexing is a technology for combine number of. Pdf flatgain wideband erbium doped fiber amplifier by. An erbium doped fiber is an optical fiber of which the core is doped with rareearth element erbium ions er3 that is rare earth material 3. The pump current of the erbium doped fiber amplifier is adjustable through the instruments front panel, allowing the user to vary the gain and output power of the amplifier. Erbiumdoped fiber amplifiers have revolutionized undersea transmission systems owing to. Therefore a population inversion and optical gain can be achieved in the er doped. The external light is launched with a characterization of a highpower erbiumdoped fiber laser francois sanchez 1, foued amrani, alioune niang, mohamed salhi1, andrey komarov1,2. Erbium doped fiber amplifiers are traditionally pumped with either 980 nm or 1480 nm laser diodes, which correspond to exciting 11 2 4i and 2 4i levels respectively.
Standard erbiumdoped fiber amplifier the optilab redfa series of erbiumdoped fiber amplifiers edfa are reliable and costeffective fiber amplifiers for use in hfc, rfog, pon and deep fiber applications. Edfa amplifier archives tutorials of fiber optic products. Novel splitband erbiumdoped fiber amplifier sciencedirect. Apr 07, 2020 lecture erbium doped fiber amplifiers edfa notes edurev is made by best teachers of. An erbium doped amplifier can amplify light wavelength ranging from app 1500 nm to more than 1600 nm. Thorlabs optical amplifiers are available as complete benchtop systems or as pigtailed butterfly packages.
An erbiumdoped fiber is an optical fiber of which the core is doped with rareearth element erbium ions er3 that is rare earth material 3. These are just a handful of the essential questions answered in erbiumdoped fiber amplifiers. The transport of information through electrical conductors results from a temporal change in a flow of electrons. One of the more popular optical amplifiers is the erbium doped fibre amplifier, commonly abbreviated as edfa 1, 2. Review of erbiumdoped fiber amplifier 23 september 2011. The spectroscopic features and laser properties of erbiumdoped silica glass are outlined first,followed by a description of the gain and saturation characteristics of infraredpumped edpa devices. The core element of a fiber amplifier is a piece of rareearthdoped fiber, which can provide. Two sections of erbium doped fibre with different modedependent gain characteristics are concatenated to equalize gain between modes. Thorlabs also offers a benchtop erbium doped fiber link amplifier developed by our strategic partner. Implementation of three functional devices using erbium. Figure 5 amplified spontaneous emission ase spectrum of erbium doped fiber pumped by a 974 nm laser diode 4. Viavi erbium doped fiber amplifier medfac1 viavi solutions. We report and characterize an amplifier which provides gain to a record six spatial modes simultaneously.
In this paper we design a 120 nm bandwidth erbiumdoped fiber amplifier using a seed light injection method for the first time. Fiber lasers, pm amplifiers rightwave highly doped erbium edf, ytterbium and thulium doped edf. Therefore a population inversion and optical gain can be achieved in the erdoped. Basic physics of erbiumdoped fiber amplifiers springerlink. Erbium doped fibers provide the basic building blocks for fiber optic amplifiers more specifically erbium doped fiber amplifiers edfas used in broadband optical networks and catv applications. The model is used in a detailed analysis of the waveguide design of 980nm pumped edfas operated in the smallsignal gain region. Topology diagram of a novel splitband erbiumdoped fibre amplifier. Voltage standard 100 240v ac auto ranging, 5060 hz power. A gainflattened lband dualcore erbiumdoped fibre amplifier.
The influence of the amplified spontaneous emission on the optimum cutoff wavelength for the lp11. The amplifier is based on erbium doped fiber, and can be incorporated directly into an optical network, avoiding the need to convert optical signals to electrical signals for amplification and relaunch. Performance analysis of erbiumdoped fiber amplifier in fiber. With over 30 years experience of the specialty optical fiber industry, fibercore ltd, the world leader in its field, is exclusively dedicated to the design, manufacture and commercialization of specialty fibers. The included the optical components and excluded the control circuit board. Erbium doped fiber amplifier edfa an amplifier is used to boost optical signals to higher power, often used both at launch and within a signal network to maintain a high signal power. Optical ampsraman and erbiumdoped fiber amplifiers pp.
Combining the contributions from four international experts in edfas, this new volume expands the readers conceptual understanding of edfas and covers the developmental issues of edfas that are relevant to modern telecom applications. Flatgain wideband erbium doped fiber amplifier by combining two difference doped fibers b. In addition, remote control of the pump current is supported by sending serial commands via a usb 2. Erbium doped fiber amplifier is the major type of the fiber amplifier used to boost the signal in the wdm fiber optic system, as we know it is wdm that increase the capacity of the fiber. It is used in the telecommunications field and in various types of research fields. A typical setup of a simple erbiumdoped fiber amplifier edfa is shown in figure 1. Introduction erbium doped fiber amplifiers are the by far most important fiber amplifiers in the context of longrange optical fiber communications. The insertion loss of all elements in the figure is 0. The device uses a short length of optical fiber doped with the rareearth element erbium. The core of the fiber is doped with erbium and is typically pumped with 980 or 1480 nm to produce gain around 1550 nm cband or 1590 nm lband. Smallsignal erbiumdoped fibre amplifiers pumped at 980 nm. Introduction erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of.
A model for the erbium doped fibre amplifier edfa is presented and discussed. A model for the erbiumdoped fibre amplifier edfa is presented and discussed. The overall gain excursion does not exceed 4db across all modes. This circuit permits implementation of the various control modes not. The first case can be described by a threelevel laser model whereas the second case is a quasithreelevel system. Article pdf available in international journal of physical sciences 620. Our line of benchtop optical amplifiers includes ytterbium doped fiber amplifiers ydfas, a praseodymium doped fluoride fiber amplifier pdfa, and erbium doped fiber amplifiers edfas. Exp 14 erbium doped fibre amplifier edfa seite 4 dr. Trends and opportunities the headway in consumer electronics is anticipated to trigger the interest for erbium doped fiber amplifier in coming years. Erbium doped fiber amplifier, 160265, rs 65000 piece. Amplification of 1550 nm optical signals in hfc networks. Erbiumdoped fiber amplifier market size, share, growth. An erbiumdoped fiber amplifier is illustrated in figure 2. Erbium doped fibre amplifiers edfa, featuring high gain over a large.
The signal to be amplified and a pump laser are multiplexed into the doped fiber, and the signal is amplified through interaction with the doping ions. Erbiumdoped fiber amplifier edfa is an optical repeater device that is used to boost the intensity of optical signals being carried through a. The headway in consumer electronics is anticipated to trigger the interest for erbiumdoped fiber amplifier in coming years. Smallsignal erbiumdoped fibre amplifiers pumped at 980.
A comparison of results for signals at wavelengths 1532 and 1552 nm is given. Jun 29, 2017 an edfa, also called optical amplifier or an erbium doped fiber amplifier or erbium amplifier, is an optical or ir infrared radiation repeater that amplifies a modulated laser beam directly, without optoelectronic and electrooptical conversion. This amplifier reflects the backward ase to the edf as a secondary pumping source. The purpose of the present paper is to report a simple lband erbiumdoped fibre amplifier which provides a large bandwidth of 50 nm from 1565 to 1615 nm, and a flat gain ripple less than 0. Erbiumdoped fiber amplifiers are the by far most important fiber amplifier in the context of long range optical fiber. The erbiumdoped fiber amplifier edfa is the most deployed fiber amplifier as its amplification window coincides with the third transmission window of silicabased optical fiber. A novel reflection lband erbium doped fiber amplifier, based on a fiber loop mirror, is constructed. Common fiber optical amplifiers include erbiumdoped fiber amplifier or edfa optical amplifier, raman fiber amplifier, and silicon optical amplifier soa. At the heart of edfa technology is the erbium doped fiber edf, which is a. Erbium doped fiber amplifier cgbefapm series, polarization maintaining edfa gip technology corporation 6f, no. Erbiumdoped optical fiber amplifier article pdf available in the alexandria medical journal 355. Index terms erbium, erbium doped fiber amplifier, energy level, optical amplifier. With product ranges available offering polarization maintaining, bendinsensitive, rareearth doped, claddingpump and photosensitive fibers. Written by three bell labs pioneers, the book stresses the importance of the interrelation of materials properties, optical properties, and systems aspects of optical fiber amplifiers.
The optimum fiber length for maximum gain is determined experimentally. The cgbs provide standard compact onboard mountable package, which can be easily driven by 30pin female or specified electric interface. The fundamental principle of this new technology is the production of an amplifying medium through optical pumping. In particular, the erbiumdoped fiber amplifier edfa is one example of an optical fiber. The fiber has an elliptical core design with high erbium concentration making it attractive for very short fiber use in the laser cavity. A limit in signaltonoise ratio that is due to concurrent amplification of spontaneous emission is observed. Erbium doped fiber amplifier are being utilized as a part of scientific and medical applications to satisfy the prerequisite for interchanges. The erbium doped fiber amplifier provides a way of amplifying all wavelength simultaneously. Erbium doped fiber amplifier edfa linkedin slideshare. This document is highly rated by students and has been viewed 320 times. An erbiumdoped fiber amplifier edfa is a device that amplifies an optical fiber signal. Luhs meos gmbh 79427 eschbach august 1998 july 2003 2 basics 2. White paper introduction to edfa technology optical.
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