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. Perhaps the most important version is erbium doped fiber amplifiers edfas due to their ability to amplify signals at the low loss 1. Optik one of the most comprehensive and detailed accounts. At least the loss limitation can be partially canceled out by the introduction of optical. Principles and applications, emmanuel desurvire offered an important exploration of the theninfant technology of erbiumdoped fiber amplifiers. Erbiumdoped glasses for fiber amplifiers at 1500 nm. Erbium doped fiber laser obtain the power spectrum of the constructed fiber laser. These are just a handful of the essential questions answered in erbiumdoped fiber amplifiersthe first book to integrate the most influential current papers on. The headway in consumer electronics is anticipated to trigger the interest for erbium doped fiber amplifier in coming years. Erbiumdoped fiber amplifier article about erbiumdoped. The most common example is the erbium doped fiber amplifier edfa, where the.
The system used in the simulation is shown in figure 1. All discbased content for this title is now available on the web. Digiovanni ofs laboratories, 19 schoolhouse road, somerset, new jersey 08873. Construction of a fiber laser in order to construct a fiber laser, connect the output port of the edfa to its input port by way of a star coupler as shown in fig. The book discusses the fundamentals of rare earth ions for. Erbium doped fiber amplifier 30mw400mw edfa booster amplifier advanced lcd type. Erbiumdoped fiber amplifier edfa is the first successful optical amplifier invented by the uk southampton university and jp tohoku university. Erbiumdoped fiber amplifiers are an important technology for lightwave voice, video, and data transmission.
It is used in the telecommunications field and in various types of research fields. The book provides basic tools for amplifier design as. Erbium doped fiber amplifier edfa used in wdm system. It is interesting to see that optical fiber amplifiers. Thorlabs corepumped erbium doped fiber amplifiers edfas offer 20 dbm 100 mw output power with a low noise figure of doped fiber amplifier is adjustable through the instruments front panel, allowing the user to vary the gain and output power of the amplifier. A 7core erbium doped doubleclad fiber amplifier with. Erbium fiber amplifiers is a comprehensive introduction to the. Erbiumdoped fiber laser obtain the power spectrum of the constructed fiber laser. All supported by our gainmaster simulation software to help you design even the most complex edfas. The first stage preamplifier is an erbium doped fiber amplifier edfa based on 110 cm long highly erbiumdoped fiber liekki er80 pumped by two 700 mw 980 nm singlemode laser diodes. 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. 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. An opticalfiber amplifier whose fiber core is lightly doped with trivalent erbium ions which absorb light at pump wavelengths of 0. Erbiumytterbium codoped fiber amplifier operating at.
Edfa erbium doped fiber amplifier tutorial exfiber optical technologies co. Erbium doped fiber amplifier are being utilized as a part of scientific and medical applications to satisfy the prerequisite for interchanges. A 7core erbium doped doubleclad fiber amplifier with sidecoupled pumping kazi s. The first part of the book explores all the fundamental issues related to edfas. It amplifies the seed signal to about 270 mw with 4. The most common example is the erbium doped fiber amplifier edfa, where the core of a silica fiber is doped with trivalent erbium ions and can be efficiently pumped with a laser at or near a wavelength of 980 nm or 1480 nm, and exhibits gain in the 1550 nm region. The erbiumdoped fiber amplifier reinvigorated the study of optical solitons for fiber optic transmission.
Sm erbiumytterbium doped fiber newport corporation. 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. Introduction erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of. This article aims to give a brief introduction to the most deployed fiber amplifier erbium doped fiber amplifier edfa. This article aims to give a brief introduction to the most deployed fiber amplifiererbium doped fiber amplifier 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. Sep 03, 2015 edfa stands for erbium doped fiber amplifiers, which is an optical amplifier that uses a doped optical fiber as a gain medium to amplify an optical signal. Jun 04, 2016 in this case, an optical fiber amplifier is required to achieve signal amplification in long distance optical communication. Schematic setup of a simple erbiumdoped fiber amplifier. The choice of the active and passive components is the key to highperformance ytterbium fiber amplifiers. Complete analysis of erbiumdoped fiber amplifiers technical paper christian hentschel, edgar leckel. The advance of the nonlinear communication soliton communication open up a bright future for edfa. Rp photonics encyclopedia tutorial fiber amplifiers. By using such amplifiers at both ends of an optical link, it is possible to greatly increase the maximum distance between transmitter and receiver, with distances up to 300km being predicted for links that. 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. Doped fiber amplifier an overview sciencedirect topics. Erbiumdoped fiber amplifiers, 2 volume set desurvire, emmanuel on. Because the electrons are shielded from external perturbations by the outer orbital, the.
The edfa amplification region varies from application to application and can be. Erbiumdoped fiber amplifier fiber transceiver solution. Erbiumdoped fiber amplifier are being utilized as a part of scientific and medical applications to satisfy the prerequisite for interchanges. The book discusses the fundamentals of rare earth ions for the. The internal use of stability high power semiconductor laser, the high stability of. Erbiumdoped fiber amplifiers fundamentals and technology optics and. What are the current types and architectures of amplifierbased systems. The term doping refers to the process of using chemical elements to facilitate results. We investigate the operation of holmiumdoped fibre amplifiers hdfas in the 2. 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. This fiber amplifier has operated for 2 months without any degradation or observed optical damage.
Erbium doped fiber amplifier 30mw400mw edfa booster. In addition, remote control of the pump current is supported by sending serial commands via a usb 2. The objective of this lesson is to demonstrate the performance of ytterbiumdoped fiber amplifiers. High peak power ytterbium doped fiber amplifiers w. Parameters which determine the operating characteristics of an erbium doped fiber amplifier are the concentration of erbium in the core of a fiber. Written by one of the pioneers in the field, this unique reference provides researchers, engineers, and system designers with detailed, interdisciplinary coverage of the theoretical underpinnings, main characteristics, and. Aug 05, 2002 praise for erbium doped fiber amplifiers.
Erbium doped fiber amplifiers, 2 volume set desurvire, emmanuel on. For the first time we demonstrate a diodepumped hdfa. First of all, the gain spectra are analyzed for the pump wavelength at 910 nm and with different input pump powers. The book is an indispensable reference for researchers, development engineers, and system designers in fiberoptic communications. Purchase erbium doped fiber amplifiers 1st edition. Thuliumdoped fiber amplifier for optical communications. Boosting of an optical signal without any conversion of the. Jun 03, 2016 this article aims to give a brief introduction to the most deployed fiber amplifier erbium doped fiber amplifier edfa. At higher pump powers, the pump drops very rapidly, due to depletion of the pump by the backward ase. Part of the nato asi series book series nsse, volume 214. In this paper we design a 120nm bandwidth erbiumdoped fiber amplifier using a seed light injection method for the first time.
The software allows the reader to explore on his or her own the concepts of amplifier performance discussed in the book, and gain a more intuitive and interactive educational experience leading to a richer understanding of erbium doped fiber amplifiers and their applications. Author of hps fiber optics handbook, he has been active in the. An erbium doped fiber amplifier is an optical or ir repeater that amplifies a modulated laser beam directly, without optoelectronic and electrooptical conversion. 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. Rare earth doped fiber amplifiers are finding increasing importance in optical communications systems. 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.
Rareearthdoped fiber lasers and amplifiers, revised and. 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. Doped fiber amplifiers dfas are optical amplifiers that use a doped optical fiber as a gain medium to amplify an optical signal. The distributed erbiumdoped fiber amplifier with gradually. As a consequence, optical amplifiers need to be most. An optical fiber amplifier whose fiber core is lightly doped with trivalent erbium ions which absorb light at pump wavelengths of 0. Principles and applications offered an important exploration of the theninfant technology of erbiumdoped fiber.
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. It has not been generally appreciated that the erbiumdoped fibre amplifier edfa has both a saturation output power which increases with. Erbium fiber amplifiers is a comprehensive introduction to the increasingly important topic of optical amplification. Boosting of an optical signal without any conversion of. Erbium doped fibre amplifier technology has made great strides in the last three years. 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. 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. Principles and applications the book is an indispensable reference for researchers, development engineers, and system designers in fiber optic communications it will excel as an introductory text in upperlevel undergraduate and graduate courses on system applications of fiber optics.
Erbiumdoped fiber amplifier market size, share, growth. When it works, the pump laser with 980 nm or 1480 nm and the input signal around 1550 nm can be combined by the wdm combiner, then transmitted and. These are just a handful of the essential questions answered in erbiumdoped fiber amplifiersthe first book to integrate the most influential current papers on this breakthrough in fiberoptics technology. The inside story of the collapse of lehman brothers. Fibercore offers a number of different doped fibers including erbium doped fiber for various c and l amplifier configurations and ase applications. 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. Erbium doped fiber amplifiers are an important technology for lightwave voice, video, and data transmission. Mark matthews, in telecommunications engineers reference book, 1993. How to suppress the noise of an amplifier is a crucial issue in the application of the edfa in the soliton transmission system. Principles and applications offered an important exploration of the theninfant technology of erbium doped fiber. Because the electrons are shielded from external perturbations by the outer orbital, the optical transitions are mainly host independent.
Introduction to optical amplifiers 417 a raman amplifier is distributed over a long span of optical fiber. A colossal failure of common sense an unabridged production. Sm erbiumytterbium doped fiber 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. This invention relates to an erbium doped fiber amplifier having improved operating characteristics. The headway in consumer electronics is anticipated to trigger the interest for erbiumdoped fiber amplifier in coming years. An erbiumdoped fiber amplifier edfa is a device that amplifies an optical fiber signal. Basic physics of erbiumdoped fiber amplifiers springerlink. In his previous book, erbiumdoped fiber amplifiers. In this way, a raman amplifier can be combinedfa booster or inlineed with a n. Novel splitband erbiumdoped fiber amplifier sciencedirect. Thuliumdoped fiber amplifier for optical communications at 2 m. Rp photonics encyclopedia tutorial fiber amplifiers, part. These are just a handful of the essential questions answered in erbiumdoped fiber amplifiers.
Principles and applications the book is an indispensable reference for researchers, development engineers, and system designers in fiberoptic communications it will excel as an introductory text in upperlevel undergraduate and graduate courses on system applications of fiber optics. It is one of the greatest invention in optical communication. Written by one of the pioneers in the field, this unique reference provides researchers, engineers, and system designers with detailed, interdisciplinary coverage of the theoretical underpinnings, main characteristics, and primary applications of edfas. Pdf erbiumdoped glasses for fiber amplifiers at 1500 nm. Principles and applications the book is an indispensable reference for researchers. Erbiumdoped fiber amplifiers has been written by early pioneers in the development of fiber amplifier technology and optically amplified systems. Multistages or booster ytterbium doped fiber amplifier, keopsys ensure long life duration and high reliability of the devices, from the laboratory to onboard applications. Erbiumdoped optical fiber is incorporated a small amount of a rare earth element erbium er ion. It has not been generally appreciated that the erbium doped fibre amplifier edfa has both a saturation output power which increases with. Starting in 1989, erbiumdoped fiber amplifiers were the catalyst for an entirely new generation of highcapacity undersea and terrestrial fiberoptic links and networks. Edfa has large gain bandwidth, which is typically tens of nanometers and thus actually it is enough to. Cdata 1550nm erbiumdoped fiber amplifier hf3003815 series adopts imported optical module, pump laser and erbium doped amplifier.
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