Pump light near 974 nm is sent into the core and has high spatial overlap with the signal beam, helping to preserve single mode propagation. A limit in signaltonoise ratio that is due to concurrent amplification of spontaneous emission is observed. 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. Figure 5 amplified spontaneous emission ase spectrum of erbium doped fiber pumped by a 974 nm laser diode 4. Novel splitband erbiumdoped fiber amplifier sciencedirect.
Erbiumdoped fiber amplifiers has been written by early pioneers in the development of fiber amplifier technology and optically amplified systems. 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. Erbium doped fiber amplifiers has been written by early pioneers in the development of fiber amplifier technology and optically amplified systems. Erbiumdoped fiber amplifier fiber transceiver solution.
Characterization of an erbiumdoped fiber amplifier as a. Moreover, as it works in the same optical domain, it avoids the need for several stages of signal conversion with their associated problems. The term doping refers to the process of using chemical elements to facilitate results. Erbium doped fiber laser er doped fiber lasers edfls can be viewed as edfas operating in the particular regime where coherent oscillation of ase occurs due to some feedback means. 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. With product ranges available offering polarization maintaining, bendinsensitive, rareearth doped, claddingpump and photosensitive fibers.
Fundamental design of a distributed erbiumdoped fiber amplifier for longdistance transmission karsten rottwitt, anders bjarklev, jorn hedegaard povlsen, ole lumholt, and thomas p. Erbium doped fiber amplifier edfa for cband optical communication system m. The fundamental principle of this new technology is the production of an amplifying medium through optical pumping. Erbiumdoped fiber amplifier article about erbiumdoped. In addition, the bitrate, the modulation format and the data. Rp photonics encyclopedia erbiumdoped fiber amplifiers. Fundamental design of a distributed erbiumdoped fiber amplifier for. With wellqualified optical and electronic circuits design, anedfa1550 keeps the excellent optical and electrical performance by using high quality devices. Erbium doped fiber amplifiers are an important technology for lightwave voice, video, and data transmission.
The erbium doped fiber amplifier provides a way of amplifying all wavelength simultaneously. The simulation has been done by using optisystem 5. Optimization tool for erbium doped fibre amplifiers electrical and. Review of erbiumdoped fiber amplifier 23 september 2011. Erbium doped fibre amplifier edfa erbium doped fibre amplifier has turned out to be especially well suited.
A single transverse mode is maintained through restricted mode launch. 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. 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. Fundamental design of a distributed erbiumdoped fiber. White paper introduction to edfa technology optical.
Erbiumdoped fiber amplifier edfa is the first successful optical amplifier invented by the uk southampton university and jp tohoku university. 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 transport of information through electrical conductors results from a temporal change in a flow of electrons. The erbiumdoped fiber amplifier edfa has made tremendous progress since its invention in 1986. Purchase erbium doped fiber amplifiers 1st edition. Implementation of three functional devices using erbium. White paper introduction to edfa technology june 2009 1 introduction shortly after their commercialization in the early 1990s, erbium doped fiber amplifiers edfas became a key enabling technology for optical communication networks, and have since comprised the vast majority of all optical amplifiers deployed in the field. For the erbium doped fibre amplifier the population inversion parameters are related to the absorption and.
Applying an inversing method and a genetic algorithm, two radial distributions, i. 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. In the last case, there are two levels in the light generation. Pump light near 974 nm is sent into the core and has high spatial overlap with the signal beam, helping to. The core element of a fiber amplifier is a piece of rareearthdoped fiber, which can provide. Erbiumdoped fiber amplifier are being utilized as a part of scientific and medical applications to satisfy the prerequisite for interchanges. Erbium doped fibre amplifiers edfa, featuring high gain over a large. The user can vary, via windows based input screens, various amplifier characteristics such as fiber length, pump power, signal power, and additional. Figure 5 amplified spontaneous emission ase spectrum of erbiumdoped fiber pumped by a 974 nm laser diode 4.
Trends and opportunities the headway in consumer electronics is anticipated to trigger the interest for erbium doped fiber amplifier in coming years. Erbiumdoped fiber laser erdoped fiber lasers edfls can be viewed as edfas operating in the particular regime where coherent oscillation of ase occurs due to some feedback means. Edfa has large gain bandwidth, which is typically tens of nanometers and thus actually it is enough to amplify data channels with the highest data rates. Fixedpoint realisation of erbium doped fibre amplifier. Single wavelength edfa erbiumdoped fiber amplifier boosteramplifier. 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 optimum fiber length for maximum gain is determined experimentally. An optical fiber amplifier whose fiber core is lightly doped with trivalent erbium ions which absorb light at pump wavelengths of 0. The passage of the 1996 telecommunications act and the growth of the internet have sparked intense demand for expanded bandwidth in all network layers, resulting in significant advances in erbium doped fiber amplifier edfa technology. The edfa module is an optical fiber amplifier product family dedicated to optical fiber communication systems. We present a singlepass lband erbium doped fiber amplifier edfa based on a large mode area lma fiber. Since its introduction in the 1980s, the edfa has contributed significantly to the success of wavelength division multiplexing wdm technology 3. These models solve the dynamics of different energy states of erbium ions and optical wave evolution that propagates in active medium. A novel light source for the nearinfrared region which has the highest intensity and widest spectral bandwidth of all nearir light sources has been developed.
By cooling the fiber to 77 k, the amplifier gain is. The passage of the 1996 telecommunications act and the growth of the internet have sparked intense demand for expanded bandwidth in all network layers, resulting in significant advances in erbiumdoped fiber amplifier edfa technology. Several parameter sets are included, each of which represents a commercially available type of erbium doped fiber used in different kinds of amplifiers e. The insertion loss of all elements in the figure is 0. Erbiumdoped fiber amplifier market size, share, growth. Erbium dopedfiber amplifiers edfas a your wife is right. 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. Erbium fiber amplifiers is a comprehensive introduction to the increasingly important topic of optical amplification. Design and development of erbium doped fiber amplifiers. 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. Anedfa1550 series erbium doped fiber amplifier edfa is important 1550nm relay transmission equipment for tv signals, digital video, telephony and data long haul transmission. All materials applied in anedfa1550 edfa meet rohs.
Shortly after their commercialization in the early 1990s, erbium doped fiber amplifiers edfas became a key enabling technology for optical communication. 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. 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. An erbiumdoped amplifier can amplify light wavelength ranging from app 1500 nm to more than 1600 nm. Osa highgain erbiumdoped travelingwave fiber amplifier. It is one of the greatest invention in optical communication. Apr 15, 20 erbium doped fiber amplifier edfa is the first successful optical amplifier invented by the uk southampton university and jp tohoku university.
Erbiumdoped fiber amplifiers, device and system developments. Jan 14, 2016 este video mostra uma animacao do funcionamento do amplificador otico edfa em portugues. The book guides the reader from the most fundamental aspects of fiber amplifiers all the way to system design and applications. Erbium doped fiber amplifier are being utilized as a part of scientific and medical applications to satisfy the prerequisite for interchanges. 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.
Topology diagram of a novel splitband erbiumdoped fibre amplifier. The doped ion produces amplified spontaneous emission ase in the nearir region from 1500 to 1600 nm when it is excited by a diode laser at 980 nm. One of the more popular optical amplifiers is the erbium doped fibre amplifier, commonly abbreviated as edfa 1, 2. Erbiumdoped fiber amplifiers is exarnined, and furthermore an account of the measurements of. Erbium doped fiber amplifier archives fiber optic cabling. Fundamental design of a distributed erbium doped fiber amplifier for longdistance transmission karsten rottwitt, anders bjarklev, jorn hedegaard povlsen, ole lumholt, and thomas p. Lband erbium doped fiber amplifier based on a large mode. Erbium doped fiber amplifiers is a bonafide work done by mr. Erbium doped fiber amplifier edfa for cband optical. Output signal power analysis in erbiumdoped fiber amplifier. Edfa stands for erbiumdoped fiber amplifiers, which is an optical amplifier that uses a doped optical fiber as a gain medium to amplify an optical signal. In addition, remote control of the pump current is supported by sending serial commands via a usb 2. Single wavelength edfa erbiumdoped fiber amplifier booster. It replaced the rather involved process of the fiber optic.
Therefore a population inversion and optical gain can be achieved in the erdoped. Erbium doped optical fiber is incorporated a small amount of a rare earth element erbium er ion. Optimized of erbiumdopedfiber amplifiers edfa parameters. Characterization of a highpower erbiumdoped fiber laser. Stability of a 500 km erbiumdoped fiber amplifier cascade dtu orbit. In particular, the erbiumdoped fiber amplifier edfa is one example of an optical fiber amplifier that is widely known for use in amplifying optical. Pdf design optimization for efficient erbiumdoped fiber. Device and system developments brings telecommunications professionals up to date. It is used in the telecommunications field and in various types of research fields. This paper provides keys to understand why erbiumdoped fiber amplifiers edfa have. Trends and opportunities the headway in consumer electronics is anticipated to trigger the interest for erbiumdoped fiber amplifier in coming years. Performance analysis of erbium doped fiber amplifiers and.
Sulaiman abstract one distinct feature of an optical fiber is that there is a wide spectral region where signals are transmitted in optical fiber. Gain and noise figure performance of erbiumdoped fiber amplifiers. Erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of longrange optical fiber communications. An erbiumdoped fiber amplifier edfa is a device that amplifies an optical fiber signal. 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. Edfa erbium doped fiber amplifier tutorial exfiber optical technologies co. Rasmussen abstruct comprehensive theoretical analysis on the design of a distributed erbium doped fiber amplifier for longdistance. Therefore a population inversion and optical gain can be achieved in. 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. Erbiumdoped optical fiber is incorporated a small amount of a rare earth element erbium er ion.
Optical amplifiers, edfa, erbium doped fiber, gain, noise figure 1. Broadband light source blsseries gip technology corporation 6f, no. Introduction erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of. An opticalfiber amplifier whose fiber core is lightly doped with trivalent erbium ions which absorb light at pump wavelengths of 0. Gain equalization of erbium doped fibre amplifiers with. Edfls are used as sources for coherent light signal generation, while edfas are used as wavewave amplifiers for. Optimization of an erbiumdoped fiber amplifier with radial. Voltage standard 100 240v ac auto ranging, 5060 hz power. Here, we use a singlestage thulium doped fibre amplifier tdfa 4 to amplify the output power from a modulated 2.
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