Erbiumdoped fiber an overview sciencedirect topics. Along with these gratings, a stg filter with a specified intracavity, loss is included close to the output end to control the intracavity loss. Customized sdh erbiumdoped fiber amplifier datasheet fs. Rp photonics encyclopedia rareearthdoped fibers, erbium. The optimum fiber length for maximum gain is determined experimentally. Erbium doped fiber amplifiers is a bonafide work done by mr.
We introduce each of these amplifiers in the following subsections. In the current amplifier design we chose 34mlong gain fiber. Here, we report only the most relevant results and deduce implications to the fiber design and the high peak power operation of such fibers. Design and development of erbium doped fiber amplifiers. The term doping refers to the process of using chemical elements to facilitate results. Modeling of gain in erbiumdoped fiber amplifiers ieee journals.
Sm erbiumytterbium doped fiber newport corporation. Edfa gain block module is an ideal building block for oem systems integration where there is a requirement to amplify a 1550 nm signal for a broad range of applications including catv systems, rfmicrowave fiber optic links, sensing and control systems, and more. Pdf erbium doped glasses for optical fiber amplifiers. Rareearthdoped fiber lasers and amplifiers, revised and.
Thuliumdoped fiber amplifier for optical communications at 2 m. For example, rp photonics has sophisticated modeling software for simulating the performance of rareearth doped fiber lasers and amplifiers. Fibercores sm erbiumytterbium doped fiber df1500y is a singlemode sm erbium er and ytterbium yb doped fiber, providing extremely high levels of pump absorption and emission around the telecoms c and l band windows. Implementation of three functional devices using erbium doped fibers. When the link consists of a number of concatenated amplifiers, then these statistics may lead to changes in received power level and even system failure. Both input and output signals are sampled and monitored with a. Importance of erbium doped fiber uniformity perhaps the most critical parameter for erbium doped fiber in high performance amplifiers is the uniformity of the gain spectrum from one coil to the next. Experiment on erbiumdoped fiber amplifiers li qian advanced labs for special topics in photonics ece 1640h university of toronto april 28,1998 1. The 9000edfa series are high quality, erbium doped fiber amplifiers used to extend signals in longhaul optical communications applications. Boosting of an optical signal without any conversion of the. The fiber has an elliptical core design with high erbium concentration making it attractive for very short fiber use in the laser cavity.
Multistages or booster ytterbium doped fiber amplifier, keopsys ensure long life duration and high reliability of the devices, from the laboratory to onboard applications. With product ranges available offering polarization maintaining, bendinsensitive, rareearth doped, claddingpump and photosensitive fibers. We experimentally validate a numerical model to study multimode erbium doped fiber amplifiers mmedfas. Osa highgain erbiumdoped travelingwave fiber amplifier. It has a builtin web server and has back reflection function, also it has control mode. There are three most important types of optical amplifiers. Modeling of gain and noise in erbiumdoped fiber amplifiers. Pdf modeling erbiumdoped fiber amplifiers semantic.
Device and system developments, a new volume designed to expands the reader s conceptual understanding of edfas and cover the. Thorlabs corepumped erbium doped fiber amplifiers edfas offer 20 dbm 100 mw output power with a low noise figure of erbium doped fiber amplifiers represent a bottleneck in broadband alloptical light wave systems. Edfa erbium doped fiber amplifier tutorial exfiber optical technologies co. This invention relates to an erbium doped fiber amplifier having improved operating characteristics. The the discovery of the light amplification pr ocess in rareearth doped optical. Thorlabs praseodymium doped fiber amplifier pdfa offers high gain 20 db small signal gain, high output power 16 dbm, and a low noise figure amplifier or preamplifier. Simple, experimentallyverified expressions are presented for the signal gain, pump absorption and output noise spectrum of erbiumdoped fiber amplifiers having arbitrary numbers of signals and pumps of arbitrary power levels and propagation directions. 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.
Fundamental design of a distributed erbiumdoped fiber amplifier for. Thorlabs offers two lines of erbiumdoped active optical fibers. Erbium fiber amplifiers is a comprehensive introduction to the increasingly important topic of optical amplification. These are just a handful of the essential questions answered in erbiumdoped fiber amplifiers. Pl2000h erbium doped fiber amplifier is the first unit to embed touchscreen lcd in catv industry. Buyers guide products erbiumdoped fiber amplifiers. Implementation of three functional devices using erbium. Parameters which determine the operating characteristics of an erbium doped fiber amplifier are the concentration of erbium in the core of a fiber. Because the electrons are shielded from external perturbations by the outer orbital, the optical transitions are mainly host independent. This 19 rack edfa is designed for catv long distance transmission, amplifying low signal power into high signal power, extending transmission distance. The erbium ion is a crucial factor for the generation of the stimulated and spontaneous emission. We propose a new pumping method for optical fiber amplifiers at 1480nm and 980nm that is able to provide high gain and low noisefigure.
Multicore erbium doped fiber amplifiers for space division multiplexing systems conference paper pdf available in journal of lightwave technology 3216. Perhaps the most important version is erbium doped fiber amplifiers edfas due to their ability to amplify signals at the low loss 1. Gain and noise figure performance of erbium doped fiber amplifiers edfa. The erbium fiber has a limit on the coil diameter of about 2 inches to obtain high reliability. Pdf erbiumdoped glasses for fiber amplifiers at 1500 nm. 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. An erbium doped fiber amplifier is illustrated in figure 2. In the last case, there are two levels in the light generation. Where to buy erbiumdoped fiber amplifiers, edfa, telecom. Doped fiber amplifiers edfas are designed to increase signal transmission distance making them ideal optical amplification solutions for.
The first case can be described by a threelevel laser model whereas the second case is a quasithreelevel system. A limit in signaltonoise ratio that is due to concurrent amplification of spontaneous emission is observed. Erbiumdoped glasses for fiber amplifiers at 1500 nm article pdf available in journal of lightwave technology 92. Liekki erdoped fibers are single mode sm and largemodearea lma fibers for use with pump wavelengths of 980 nm or 1480 nm and emissions in the c and l telecommunications bands 1530 1565 nm or 1565 1625 nm, respectively. Design optimization for efficient erbium doped fiber amplifiers. Modeling erbiumdoped fiber amplifiers ieee journals. The gain and noise figure obtained was 38 db and 6 db with an improvement of 4 db and 1. It is interesting to see that optical fiber amplifiers ofas are penetrating all lightwave communication markets and applications.
Optostar 64667c 1550 nm erbium doped fiber amplifier the optostar 64667c 1550 nm erbium doped fiber amplifier edfa is designed for multiplex distribution configuration and long distance relay transmission network configuration in conjunction with the 1550 nm optical transmitter. A 7core erbium doped doubleclad fiber amplifier with. Optical amplifiers, edfa, erbium doped fiber, gain, noise figure 1. Optostar 64667c 1550 nm erbium doped fiber amplifier. In particular, the possibility of obtaining very small or very largemode area with this new kind of optical fibers has been exploited to realize new fiber lasers 6. Erbiumdoped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous twolevel laser medium. Erbium doped fiber amplifier is a optical amplifier, it amplifies weak input optical signals directly without any conversions pumped with a laser diode. The fiber can be used for lower power fiber lasers, preamplifiers and amplified spontaneous emission ase light sources. In optical communication network, signals travel through fibers for very large distances. An amplifier design optimized for use in the systemslab or for optical test for map series. The amplifcation and noise properties in each core of the 7core amplifier were studied one at a time by coupling signal into and out of the gain fiber using two antireflectioncoated lensed fibers attached to precision stages. Various types of optical amplifiers have been developed in ofcs to amplify optical signals.
Edfa is an optical device that amplifies the optical signals without optoelectronic and electro optical conversion. Doped fiber amplifier an overview sciencedirect topics. Fiber lasers, pm amplifiers edf50 pm 27281 a pm fiber with absorption of 50 dbm at 1530 nm. The stability pump optical laser and unique apc automatic power control circuit are employed in it as the key component. Pdf erbiumdoped fiber amplifier edfa is an optical amplifier used in the c band and lband, where the loss of telecom optical fibers. Development of eryb codoped fiber for highpower optical. Pdf erbiumdoped fiber amplifier edfa is an optical amplifier used in the cband and lband, where the loss of telecom optical fibers. Principles and applications these are just a handful of the essential questions answered in erbium doped fiber amplifiers the first book to integrate the most influential current papers on this breakthrough in fiber optics technology. An analytic method is described for fully characterizing the gain of an erbiumdoped fiber amplifier edfa that is based on easily measured monochromatic. Aug 05, 2002 this twovolume set combines erbium doped fiber amplifiers. The major glass types potentially useful in this application are considered and compared to silica.
Doped fiber amplifiers dfas are optical amplifiers that use a doped optical fiber as a gain medium to amplify an optical signal. The amplifier cavity contains a length of erbium doped fiber with two narrowband braggmatched fiber grating reflectors. Erbium doped fiber amplifier, catv 1550nm edfa, catv edfa. 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. 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 amplifiers are the by far most important fiber amplifiers in the context of longrange optical fiber communications. Erbiumdoped fiber amplifier market size, share, growth. 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.
The emcore mafa 5000 series micro erbium doped fiber amplifier. Written by one of the pioneers in the field, this unique reference provides. Purpose of the experiment understand the principle of operation of the erbiumdoped fiber amplifier edfa. Erbium doped glasses for fiber amplifiers at 1500 nm article pdf available in journal of lightwave technology 92. 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. Erbiumdoped fiber amplifiers, device and system developments.
Erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of longrange optical fiber communications. Rp photonics encyclopedia erbiumdoped fiber amplifiers. Pdf multicore erbium doped fiber amplifiers for space. Device and system developments brings telecommunications professionals up to date. The choice of the active and passive components is the key to highperformance ytterbium fiber amplifiers. Review of erbiumdoped fiber amplifier article pdf available in international journal of physical sciences 620 september 2011 with 1,862 reads how we measure reads. Helmy department of electrical and computer engineering, university of toronto, 10 kings college road, toronto, on m5s 3g4, canada. In section 5 we report the results of our tests on a series of ytterbium doped double cladding fiber amplifiers where the effective modal area was progressively increased. Edfa erbium doped fiber amplifier physics and radio. The most common example is the erbium doped fiber amplifier. Edfa erbium doped fiber amplifier is an optical device used to compensate optical signal attenuation caused by fibers and components, to increase optical transmission distance. The objective of this lesson is to demonstrate the amplification of a sequence of gaussian pulses by an ytterbiumdoped fiber amplifier using the dynamic model.
Using a pure lp01 pump beam, which greatly simplifies amplifier. Using this model, we demonstrate the improved performance achievable in a step index mmedfa incorporating a localized erbium doped ring and its potential for space division multiplexed sdm transmission. To analyze the dynamic characteristics of the highpower ytterbiumdoped doubleclad fiber amplifier considering pulses in repetition rates of khz, a dynamic ytterbiumdoped fiber model is necessary. Such highperformance amplifiers may enhance lightwave systems and have already. At least the loss limitation can be partially canceled out by the introduction of optical.
Fiber lasers, pm amplifiers rightwave highly doped erbium edf, ytterbium and thulium doped edf. The highgain phosphate optical glass fiber amplifiers are integrated onto substrates to form an integrated. At higher pump powers, the pump drops very rapidly, due to depletion of the pump by the backward ase. Numerical methods are used to analyze the effects of optical modes and erbium confinement on amplifier performance, and to calculate both the gain and amplified spontaneous emission ase spectra. Its core is the erbium doped optical fiber, which is typically a singlemode fiber. The most common example is the erbium doped fiber amplifier edfa, where the. An erbiumdoped fiber amplifier edfa is a device that amplifies an optical fiber signal. The topics addressed include quenching processes and the solubility of rareearth ions, transition strengths and bandwidths. Further improvements of optical clocks and the search for systematic effects demand for intercomparisons between the best optical clocks, which are often located in different labs or. This is due to the fact that it is difficult to build optical amplifiers with pdgs. 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.
In the shown case, the active fiber is pumped with light from two laser diodes bidirectional pumping, although unidirectional pumping in the forward or backward direction codirectional and counterdirectional pumping. Introduction erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of. Development of eryb codoped fiber for highpower optical amplifiers by keiichi aiso, yoshio tashiro 2, tsuneo suzuki 3 and takeshi yagi the increasing capacity of wavelengthdivision multiplexing wdm transmission systems requires higher optical output power of erbium doped fiber amplifiers edfas. Pdf design optimization for efficient erbiumdoped fiber. Ask rp photonics for any advice concerning the use of rareearth doped fibers e. 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. One of the most important factors limiting the transmission. Accurate modal gain control in a multimode erbium doped. Thorlabs corepumped erbiumdoped fiber amplifiers edfas offer 20 dbm 100 mw output power with a low noise figure of fiber for a 14 m length of erbium doped fiber fiber a, for injected pump powers at z 0 of 4, 10, 20, and 40 mw at 980 nm, and with an injected signal of power 40 dbm at 1550 nm. Rareearth doped glasses are ve ry attractive materials for their applications in fiber amplifiers as gain medium. An optical fiber amplifier utilizing a phosphate glass optical fiber highly doped with rareearth ions such as erbium to exhibit high gain per unit length, enabling the use of short fiber strands to achieve the needed gain in practical fiber optical communication networks.
The topics addressed include quenching processes and the solubility of rareearth ions, transition strengths and bandwidths at the 1500nm gain. Erbium doped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous twolevel laser medium. Emcore erbium doped fiber amplifiers edfa are ideal building blocks for system integrators to extend the fiber links for longhaul signal transport, highperformance supertrunking, high power distribution networks, and sensing and control systems. Viavi erbium doped fiber amplifier medfac1 viavi solutions. Erbium doped fiber amplifier are being utilized as a part of scientific and medical applications to satisfy the prerequisite for interchanges.
The optical signal is injected into this fiber, along with the light from a special pump laser that is designed to excite the erbium ions. Pdf modeling erbiumdoped fiber amplifiers semantic scholar. Erbiumdoped glasses for fiber amplifiers at 1500 nm. It is used in the telecommunications field and in various types of research fields. Rareearthdoped fiber lasers and amplifiers, revised and expanded crc press book a discussion of the theories, operating characteristics, and current technology of main fiber laser and amplifier devices based on rareearthdoped silica and fluorozirconate fibers. Rare earth doped fiber amplifiers are finding increasing importance in optical communications systems. Principles and applications, an important exploration of the theninfant technology of erbium doped fiber amplifiers, and erbium doped fiber amplifiers. Pdf gain and noise figure performance of erbium doped.
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