Rare earth doped optical fibers with multisection core. Rare earth doped fibers are doped with ions of rare earth elements to achieve high absorption and low loss in the visible and ir regions. Osa nanoparticle doping for high power fiber lasers at. Jan 17, 2012 semiconductor optical waveguide amplifiers have high gain per unit length dbcm, but suffer from spatial and temporal gain pattering effects. It is more difficult to write bragg gratings in these fibers than in standard fibers. It has applications as preamplifiers, postamplifiers, and repeater amplifiers in evolving optical networks.
Rare earth doped fibre lasers and amplifiers have been demonstrated at several wavelengths in the visible and near infrared regions. Several technical revolutions over the last ten years have led to the increasing use of rare earthdoped fiber lasers and amplifiers as a key component of optical communication systems. It describes the erbiumdoped fiber amplifier and its role as foundational in optical communication systems. Dutta presents students, academics, researchers, and professionals working in a variety of contexts with a comprehensive examination of the design and applications of rare earth doped fiber amplifiers and fiber lasers. It has now been a significant number of years since the first edition of rare earth doped fiber lasers and amplifiers was published in 1993 under the editorship of michel j.
Pyfiberamp is a rate equation simulation library for rareearthdoped fiber amplifiers and fiber lasers partly based on the giles model. Rareearthdoped fiber lasers and amplifiers second edition, revised and expandededited bymichel j. A nanoparticle np doping technique was developed for fabricating erbium er and holmium ho doped silicabased optical fibers for high energy lasers. The following table shows the most common laseractive ions and host glasses and also typical emission wavelength ranges of rare earth doped fibers. It has applications as pre amplifiers, post amplifiers, and repeater amplifiers in evolving optical networks. The rareearthdoped fiber lasers and amplifiers can be modeled as three and fourlevel atomic systems. For example, rp photonics has sophisticated modeling software for simulating the performance of rare earth doped fiber lasers and amplifiers. Fiber lasers and fiber amplifiers are nearly always based on glass fibers which are doped with laser active rare earth ions normally only in the fiber core. Silicon rich nitride ring resonators for rare earth doped. Rp photonics encyclopedia rareearthdoped fibers, erbium. Rare earthdoped fibers an overview sciencedirect topics. However, bi doped fiber lasers and amplifiers are still far from their optimum performance owing to the unclear nature of the nearinfrared emitting bi active centers.
When grouped with rareearths, glass optical fibres provide the ideal amplifier and laser medium. 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. Rare earth doped fibers are doped with ions of rareearth elements to achieve high absorption and low loss in the visible and ir regions. We describe recent advances in the field with particular attention to applications in telecommunications. Rareearthdoped fiber lasers and amplifiers request pdf. Rareearthdoped fiber an overview sciencedirect topics. Payne in fiber laser sources and amplifiers 1990 522 erbiumdoped fibre amplifiers with an extremely high gain coefficient of 11. When doped with rare earth elements, the fiber is given optical gain that enables light amplification. To find the maximum desired area of the core, it is more convenient to use the power threshold estimate equation for a laser. Rareearth doped fibre lasers and amplifiers for optical. Rareearthdoped fiber lasers and amplifiers, revised. Highpower fiber lasers and amplifiers highpower fiber lasers and amplifiers tuennermann, andreas. Spie 7721, solid state lasers and amplifiers iv, and highpower lasers, 772106 17 may 2010. Er and yb single mode sm and large mode area lma fiber is available as well as polarizationmaintaining pm yb doped fiber.
The rareearthdoped fiber lasers and amplifiers can be modeled as three and. Aug 22, 2017 the discovery of rare earth doped fiber amplifiers two decades ago resulted in the proliferation of the 10 nm and 1550 nm wavelengths in telecommunications 1, 2. This invaluable book provides a comprehensive treatment of design and applications of rare earth doped fiber amplifiers and fiber lasers. Thermal stress anomaly in rareearthdoped fiber materials. Rareearthdoped fiber amplifier article about rareearth. Gain saturation in optical fiber laser amplifiers intechopen. Conventional fiber lasers made with silica fiber, require meters of fiber length to generate powers up to 10 watts. Radiation effects expected for fiber laseramplifier rare earth doped optical fiber melanie ott sigma research and engineering nasa gsfc, parts, packaging and assembly technologies office march 26, 2004 1. Rare earth doped fibers for use in fiber lasers and amplifiers.
However, bidoped fiber lasers and amplifiers are still far from their optimum performance owing to the unclear nature of the nearinfrared emitting bi active centers. Buy rare earth doped fiber lasers and amplifiers, revised and expanded optical science and engineering on free shipping on qualified orders. Rareearthdoped glass fibre lasers and amplifiers eprints. It describes the principles, designs, and properties of the erbiumdoped fiber amplifier and its role as the cornerstone component in optical communication systems.
Rareearth doped fiber is frequently used in fiber lasers, optical amplifiers, and ase sources. Depending on the fiber laser architecture, preamplifiers are often used to reduce the gain level required from the power amplifier in a mopa system. All of this is made possible by the unique performance attributes of rare earth doped silica fibers which is at the heart of each of. The important distinction between the two arises from the terminating level of the amplifying transition.
Rareearth doped optical fibers have captivated the interest of many researchers around the world. Such optical fibers and rods may be employed in fiber lasers and amplifiers. Telecommunicationsgrade erbium doped fiber amplifiers edfas are a mature technology and several very good books have been written on the subject. Osa nanoparticle doping for high power fiber lasers at eye. Introduction to pyfiberamp pyfiberamp is a rate equation simulation library for rareearthdoped fiber amplifiers and fiber lasers partly based on the giles model. A comprehensive analysis has been implemented using the set of coupled propagation rate equations based on the atomic energy structure of dopant as well as the. Rare earthdoped fiber lasers and amplifiers springerlink. The conclusion is that hydrogen loading improves the photosensitivity of germaniumfree rareearthdoped fibers. A brief introduction of rareearth doped fibers rareearth doped fiber is an.
Based on ytterbium doped largemodearea doubleclad fibers, in the continuous regime, output powers approaching the kwrange with diffraction limited beam quality have been shown. Dutta presents students, academics, researchers, and professionals working in a variety of contexts with a comprehensive examination of the design and applications of rare. Rareearthdoped fiber lasers and amplifiers, second edition, revised and expanded download here. A discussion of the theories, operating characteristics, and current technology of main fiber laser and amplifier devices based on rareearthdoped silica and. This application relates to optical fibers including, for example, rare earth doped optical fibers and fibers with large effective area, which can be used for example in fiber lasers and amplifiers, as well as methods of making such fibers. Slope efficiencies in excess of 74% were realized for er np doping in a single mode fiber based master oscillator power amplifier mopa and 53% with multiwattlevel output in a resonantly claddingpumped power oscillator laser. 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. This invaluable book provides a comprehensive treatment of design and applications of rareearthdoped fiber amplifiers and fiber lasers. Several technical revolutions over the last ten years have led to the increasing use of rare earth doped fiber lasers and amplifiers as a key component of optical communication systems.
Digonnet and others published rareearthdoped fiber lasers and amplifiers find, read and cite all the research you. Rareearth doped optical fibers, selected topics on optical fiber technology, moh. Digonnet, rareearthdoped fiber lasers and amplifiers. Highpower fiber lasers and amplifiers, proceedings of spie. The discovery of rare earth doped fiber amplifiers two decades ago resulted in the proliferation of the 10 nm and 1550 nm wavelengths in telecommunications 1, 2. Rareearth doped fibers are doped with ions of rareearth elements to achieve high absorption and low loss in the visible and ir regions. This new edition is fully revised including new material on visible fluoride fiber lasers, singlefrequency fiber lasers, broadband fiber sources, qswitch fiber lasers, and rare earth doped infraredtransmitting glass fibers. The index of refraction of the glass may be substantially uniform and may be close to that of silica in some embodiments. Chapter 9 rare earth doped infraredtransmitting glass fibers 449 j. Rare earth doped fibers can be used as amplified sources when they are pumped with a laser having a high powered, continuous output at an optical frequency slightly higher than that of the desired fiber output. The theory is applicable to dopants such as erbium, neodymium, thulium. Worse, germanium is replaced by aluminum al 2 o 3 to reduce the effect of quenching and lifetime shortening 79. Rare earth doped fiber lasers and amplifiers issuu. Ask rp photonics for any advice concerning the use of rare earth doped fibers e.
Ask rp photonics for any advice concerning the use of rareearthdoped fibers e. The vast majority of rare earth doped fibers employ a uniform gain area overlapping with the circular core completely figure 1b. The vast majority of rareearthdoped fibers employ a uniform gain area overlapping with the circular core completely figure 1b. Jan 17, 2006 what is important for 3level devices, such as these rare earth doped fiber lasers, is the level of pump power density that can be created in the core, which defines the achievable inversion. Rareearthdoped fibre lasers typically supply a single wavelength in the range. Active rare earth doped optical fiber rare earth doped fiber is frequently used in fiber lasers, optical amplifiers, and ase sources. In addition, fibre lasers have been demonstrated using various rareearths which give emission wavelengths spanning the region 400nm to 3. Rareearth doped photonic crystal fibre lasers and amplifiers. A nanoparticle np doping technique was developed for fabricating erbium er and holmium hodoped silicabased optical fibers for high energy lasers. Based on ytterbiumdoped largemodearea doubleclad fibers, in. These ions absorb pump light, typically at a shorter wavelength than the laser or amplifier wavelength except in upconversion lasers, which excites them into some metastable levels. Fiber amplifiers and fiber lasers by niloy k dutta nook. Rp photonics encyclopedia rareearthdoped gain media. Rareearthdoped linbo3 waveguide amplifiers and lasers.
Proceedings paper thermal stress anomaly in rareearthdoped fiber materials for highpower fiber lasers codoped with aluminum and phosphorus. Selected papers on rareearthdoped fiber laser sources. Semiconductor optical waveguide amplifiers have high gain per unit length dbcm, but suffer from spatial and temporal gain pattering effects. This new edition is fully revised including new material on visible fluoride fiber lasers, singlefrequency fiber lasers, broadband fiber sources, qswitch fiber lasers, and rareearth doped infraredtransmitting glass fibers.
Various embodiments described herein include rare earth doped glass compositions that may be used in optical fiber and rods having large core sizes. Selected papers on rareearthdoped fiber laser sources and. New high power rareearthdoped fiber laser materials and. It describes the erbium doped fiber amplifier and its role as foundational in optical communication systems. Optical fiber amplifier is an important component for optical communication systems. Fiber amplifiers and fiber lasers world scientific. A consequence of this is that the upperstate lifetimes can be long, i. This chapter describes the determination of amplifying parameters in rareearthdoped optical fiber laser amplifiers. 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. A discussion of the theories, operating characteristics, and current technology of main fiber laser and amplifier devices based on rareearthdoped silica and fluorozirconate fibers. Payne in fiber laser sources and amplifiers 1990 522 erbium doped fibre amplifiers with an extremely high gain coefficient of 11.
Buy rareearthdoped fiber lasers and amplifiers, revised and expanded optical science and engineering on free shipping on qualified orders. They are typically used for amplification in fiber lasers or optical amplifiers. Simple continuouswave, gainswitched and qswitched fiber lasers. Us9151889b2 rare earth doped and large effective area. An analytical model for two, three, and fourlevel system rare earth doped fiber amplifiers and lasers is presented. Nov 11, 2008 this application relates to optical fibers including, for example, rare earth doped optical fibers and fibers with large effective area, which can be used for example in fiber lasers and amplifiers, as well as methods of making such fibers. Rareearthdoped fibre lasers and amplifiers eprints soton. A fiber laser or fibre laser is a laser in which the active gain. The technologically most important rare earth doped fibers are erbium doped fibers for erbium doped fiber amplifiers edfa and ytterbium doped fibers for highpower fiber lasers and amplifiers.
For example, rp photonics has sophisticated modeling software for simulating the performance of rareearthdoped fiber lasers and amplifiers. All rare earth doped gain media have in common that the pump and laser transitions are socalled weakly allowed transitions with fairly small oscillator strength. New rareearthdoped glass fiber lasers and amplifiers for 1. Analytical model for rareearthdoped fiber amplifiers and. Us82758b2 rare earth doped and large effective area. A discussion of the theories, operating characteristics, and current technology of main fiber laser and amplifier devices based on rare earth doped silica and fluorozirconate fibers. We offer fiber doped with erbium, ytteerbium, and neodymium to meet many photonics applications. An optical fiber typically comprises a central core surrounded by a cladding with lower refractive index. What is important for 3level devices, such as these rareearthdoped fiber lasers, is the level of pump power density that can be created in the core, which defines the achievable inversion. Silicon rich nitride ring resonators for rare earth.
Threelevel airclad rareearth doped fiber laseramplifier. Challenges to further power scaling of eryb fiber amplifiers and lasers. Users may download and print one copy of any publication from the public portal for the purpose of. All rareearthdoped gain media have in common that the pump and laser transitions are socalled weakly allowed transitions with fairly small oscillator strength. Rare earth doped and large effective area optical fibers.
Rare earth doped and large effective area optical fibers for. Brezinski md, phd, in optical coherence tomography, 2006. Design of rare earth doped multicore fiber lasers and amplifiers. Buy rareearthdoped fiber lasers and amplifiers, revised and expanded optical science and engineering on. Dec 23, 2004 experimental results based on rare earth doped fibers have impressively shown that fiber lasers and amplifiers are an attractive and power scalable solidstate laser concept. They all use rare earth doped fibers as the gain medium for the device splice between two fibers. It was volume 37 of this series of books on optical engineering.
Rareearthdoped fibre lasers and amplifiers have been demonstrated at several wavelengths in the visible and near infrared regions. With product ranges available offering polarization maintaining, bendinsensitive, rareearth doped, claddingpump and photosensitive fibers. For a vast number of applications, such as fiber lasers and amplifiers, it is necessary to fabricate gratings in rareearthdoped fibers. Rareearthdoped fiber lasers and amplifiers michel j. It describes the principles, designs, and properties of the erbium doped fiber amplifier and its role as the cornerstone component in optical communication systems. Highpower fiber lasers and amplifiers, proceedings of. Radiation effects expected for fiber laseramplifier rare. Besides rare earth doped bulk crystals, also initially undoped substrates have been used for device fabrication. Fibercore offers a ytterbium doped, core pump fiber, df1100 for a 1060nm preamplifier and a full range of erbium doped fibers in the isogain range, but specifically i15980125hc offers a. The large mode area decreases the therm al stress and nonlinearity dra wbacks arising. Amplifiers exhibiting gains in excess of 50db can be made with a noise figure close to the quantum limit. Get your kindle here, or download a free kindle reading app. Fiber amplifier gain is expressed in terms of attenuation coefficients, intrinsic saturation powers, and crosssaturation powers at the pump and signal wavelengths. Rareearthdoped fiber lasers and amplifiers, revised and.
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