Rp photonics encyclopedia tutorial fiber amplifiers. It has a builtin web server and has back reflection function, also it has control mode. The edfa can change the total erbiumdoped fiber length by selecting many combinations of five edfs with optical switches sws and wdm technology. Doped fiber amplifier an overview sciencedirect topics. The ytterbiumdoped fiber amplifier offers a number of attractive features, including a broadgain bandwidth and a high efficiency, due in large part to its freedom from various competing. The development of erbiumdoped fiber amplifier edfa. It is used in the telecommunications field and in various types of research fields. High gain erbiumdoped fiber amplifier for the investigation of. Fiber lasers, pm amplifiers edf50 pm 27281 a pm fiber with absorption of 50 dbm at 1530 nm. Ytterbiumdoped optical amplifiers have become common tools for industrial applications due to their high efficiency, relatively low cost and potentially very high output power level. Fiber lasers, pm amplifiers rightwave highly doped erbium edf, ytterbium and thulium doped edf.
Numerical modeling of the thermally induced core laser leakage in high power copumped ytterbium doped fiber amplifier volume 6 lingchao kong, jinyong leng, pu zhou, zongfu jiang. 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. Er 1550c3 lc fiber offers customers a highly uniform ovd processed fiber alternative to established low cutoff designs, resulting in greater manufacturing control and procurement flexibility. Eindhoven university of technology master an optical amplifier. Edfas and co doped erbiumytterbium doped fiber amplifiers are available commercially with gains of 3040 db and 25 dbm of output saturation power. Valerii vartan termikirtychev fundamentals of fiber lasers and fiber ampli. Analysis of ase noise in erbium doped fiber amplifier. Tutorial selecting the optimal eryb doped optical fiber. Currently, the edfa is one of the most important elements widely used. We also compare the operation of hdfas when pumped at 1950 nm.
Ask rp photonics for any advice concerning the use of rareearthdoped fibers e. A 23db bismuthdoped optical fiber amplifier for a 1700. Numerical modeling of the thermally induced core laser. Fiber amplifiers are optical amplifiers based on optical fibers as gain media. The emcore mafa 5000 series micro erbium doped fiber amplifier. Various types of optical amplifiers have been developed in ofcs to amplify optical signals. These are just a handful of the essential questions answered in erbiumdoped fiber amplifiers. The first implementation of active fiber optic amplifier was demonstrated in 1994 with erbiumdoped fiber amplifier edfa. Today, they are widely used in all kinds of fiber communication systems, especially wavelength division multiplexed wdm systems 2 3. In the amplifier, peak power of the amplified pulse reaches 1. What are the current types and architectures of amplifierbased systems. Thorlabs optical amplifiers are available as complete benchtop systems or as pigtailed butterfly packages.
Here we discuss the main features that influence design and possible applications of ytterbiumdoped fiber amplifiers. An erbiumdoped fiber amplifier edfa is a device that amplifies an optical fiber signal. At erdoped fiberlaser pumping, the maximum peak power of the gainswitched seed pulse is 227. Additionally, the transmission mode of the optical fiber at the pump wavelength has a radius which is substantially equal to or greater than the radius of the distribution profile. It is now almost twentyfive years since the first erbiumdoped fiber amplifier edfa was demonstrated. Tmdoped fiber amplifier with supercontinuum output. Fiber lasers tmdf200 40910 a thulium doped fiber with an absorption of 200 dbm at 790 nm. The ytterbium doped fiber amplifier offers a number of attractive features, including a broadgain bandwidth and a high efficiency, due in large part to its freedom from various competing. Design considerations and system performances tutorial singlestage eryb amplifier using singlemode eydf xp products to reach a few watts of output power, the amplifier must be designed with an eryb fiber optimized for high extractable gain and high efficiencies. Valerii vartan termikirtychev fundamentals of fiber lasers and fiber amplifiers. Perhaps the most important version is erbium doped fiber amplifiers edfas due to their ability to amplify signals at the low loss 1.
Although optical gain can overcome the limitations of receiver noise, the noise contributed by the amplifier must be considered 28. Fiber amplifier,erbiumdoped fiber amplifier,ytterbium. The dwdm edfa is a lownoise, gainflattened cband optical erbium doped fiber amplifier edfa designed to extend the distance in dense wavelengthdivision multiplexing dwdm optical infrastructure. This host presents several key benefits over silica, particularly much higher yb2 o3 concentrations up to 26 wt%, a 50%.
It provides customers with the capability to extend their 100ghz, up to 40 channels, 2. Techwin china offer you various type of fiber amplifiers like 1. The corning advantage all erbiumdoped fibers are not equal. For the first time we demonstrate a diodepumped hdfa. When the pulse is turned off, damped oscillations are observed too with the same period as in. 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. This amplifier provides a peak gain of 25 db at 2040 nm with a 15 db gain window spanning the wavelength range 2030 2100 nm with an external noise figure nf of 46 db. Doped fiber amplifiers dfas are optical amplifiers that use a doped optical fiber as a gain medium to amplify an optical signal. Fiber lasers quality products, customer part codes, flexible capacity production, consistency and service agility are just some attributes that make ofs the norisk choice for amplifier manufacturers. At least the loss limitation can be partially canceled out by the introduction of optical. Erbium doped fiber amplifier, catv 1550nm edfa, catv edfa. Pl2000h erbium doped fiber amplifier is the first unit to embed touchscreen lcd in catv industry.
A diode pumped all fiber bi doped amplifier with a flat gain of 25 1 db from 2060 nm 40 nm has been demonstrated for. In optical communication network, signals travel through fibers for very large distances. Advanced photonics journal of applied remote sensing. This invention is a rare earth doped optical amplifier with increased gain and lowered pump thresholds. Pdf modeling erbiumdoped fiber amplifiers semantic scholar. Multistage 2m polarizationmaintaining single clad tm. We build a tmdoped fiber amplifier based on a gainswitched seed laser. Unfortunately or fortunately, we have discovered that at the lasing time there is no amplification or the signal travels the erbium doped fiber core without any amplification or absorption. Performance analysis of erbium doped fiber amplifiers and fwm characteristics in a passive optical network. 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. 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. We demonstrate a bidoped fiber amplifier operating in the range of 14251500 nm with the maximum gain of 27.
Because the electrons are shielded from external perturbations by the outer orbital, the. In the limit of high gain, the optical noise power per optical mode standard singlemode fiber supports two. We investigate the operation of holmiumdoped fibre amplifiers hdfas in the 2. After the pioneering work on fiber lasers 11, 2, research on rareearth dopedfibers remained nearly dormant until the demonstration of highgain erbium doped fiber amplifiers 3, 4, and their use in lightwave trans. Our line of benchtop optical amplifiers includes ytterbiumdoped fiber amplifiers ydfas, a praseodymiumdoped fluoride fiber amplifier pdfa, and erbiumdoped fiber amplifiers edfas. Laser diode module, dpss laser,fiber coupled laser for sale. The most common example is the erbium doped fiber amplifier edfa, where the. Implementation of three functional devices using erbium. Introduction to optical amplifiers 417 a raman amplifier is distributed over a long span of optical fiber. 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. Edfa amplifier repeater replaced the expensive and unreliable electronic regenerator in optical fiber system, the use of edfa amplifier. Valerii vartan termikirtychev mountain view, ca usa. Modeling erbiumdoped fiber amplifiers ieee journals. Demand on higher bandwidth bring about to use the other rare earth doped fiber such as thuliumdoped fiber amplifiers tdfas.
Conference proceedings papers presentations journals. The fibers used here were fabricated by modified chemical vapor depositionsolution doping technique and characterized for their unsaturable loss. Please see the pdf emission tab for more information on light emission in prdoped fluoride fibers pdf. Typically, the optical pump is introduced at the end of a length of fiber in order to provide optical gain that increases towards the end of the fiber. Additional short length fiber and waveguide amplifier performance data is also presented. Introduction erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of. 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. Design and development of erbium doped fiber amplifiers. Bidoped fiber amplifiers and lasers invited request pdf.
Erbium doped fiber amplifier cgbefapm series, polarization. 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. The erbium doped fiber amplifier edfa has gone the tremendous changes since its invention in 1986. The maximum achievable optical output power of the fiber amplifier is limited by the available pump power, typical erdoped fiber amplifiers permit. Erbiumdoped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous twolevel laser medium. Valerii vartan termikirtychev fundamentals of fiber. Department electrical engineering, the federal polytechnic, ilaro, nigeria. 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. Erbium doped fiber amplifiers are the by far most important fiber amplifiers in the context of longrange optical fiber communications. Pdf erbiumdoped fiber amplifier edfa is an optical amplifier used in the c band and lband, where the loss of telecom optical fibers. Corning understands the each customers amplifier design varies and their need for custom. The pdfa incorporates a relatively short length of pdf, which results in a signal latency erbium doped fiber amplifier tutorial exfiber optical technologies co. Erbium doped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous twolevel laser medium.
Boosting of an optical signal without any conversion of. For example, rp photonics has sophisticated modeling software for simulating the performance of rareearthdoped fiber lasers and amplifiers definition. Moreover, we present the influence of pump wavelengths on the gain, noise figure and laser efficiency of these bi doped fiber amplifiers and lasers. The ytterbiumdoped fiber amplifier offers a number of attractive features, including a broadgain bandwidth and a high efficiency, due in large part to its freedom from various competing processes seen in other rareearth dopants.
The amplifying scheme is based on a 3 level lasing system rather than the more prevalent 4 level lasing system. Gain, noise figure and forward ase spectrum of a forwardpumped erbiumdoped fiber amplifier. As an example, we consider an erbiumdoped fiber amplifier, as it could be used in optical fiber communications, e. The fiber has an elliptical core design with high erbium concentration making it attractive for very short fiber use in the laser cavity. The term doping refers to the process of using chemical elements to facilitate results. Performance analysis of erbium doped fiber amplifiers and. Rare earth doped fiber amplifiers are finding increasing importance in optical communications systems. Supercontinuum generation is observed when this amplified pulsed laser source. Doped fiber amplifier and fiber laser file exchange. Thorlabs also offers a benchtop erbiumdoped fiber link amplifier developed by our strategic partner. Bambha prepared by sandia national laboratories albuquerque, new mexico 87185 and livermore, california 94550 sandia national laboratories is a multiprogram laboratory managed and operated by sandia corporation. High gain ultrashort length phosphate glass erbiumdoped.
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