Broadband light source blsseries gip technology corporation 6f, no. 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. Fiber lasers, pm amplifiers edf50 pm 27281 a pm fiber with absorption of 50 dbm at 1530 nm. Erbiumdoped fiber amplifier edfa is an optical repeater device that is used to boost the intensity of optical signals being carried through a fiber optic communications system how it works. This device features high output power, high gain, low power consumption and low noise figure. Thorlabs optical amplifiers are available as complete benchtop systems or as pigtailed butterfly packages. The fiber has an elliptical core design with high erbium concentration making it attractive for very short fiber use in the laser cavity. Pdf gain and noise figure performance of erbium doped. This erbium doped fiber act as a gain medium that amplifies an optical signal. The internal use of stability high power semiconductor laser, the high stability of wdm, isolator, and high gain erbium doped fiber. Numerical methods are used to analyze the effects of optical.
Fiber optic sensing description gip technology bls series are the broadband light source. Erbium doped fiber and polarization maintaining pm fiber. It is a lowcost optical gain module in a very robust and compact package providing amplification of optical signal for a variety of applications. 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.
Performance analysis of erbium doped fiber amplifier s. An edfa consists of a wavelength division multiplexer wdm coupler to combine the pump with the input signal light. 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. With product ranges available offering polarization maintaining, bendinsensitive, rareearth doped, claddingpump and photosensitive fibers. Characterization of a highpower erbiumdoped fiber laser. Doped fiber amplifiers dfas are optical amplifiers that use a doped optical fiber as a gain medium to amplify an optical signal. Here, we study multimode erbium doped fiber amplifiers mmedfas for signals spatially multiplexed in 12 modes six spatial modes in two polarizations. Osa highgain erbiumdoped travelingwave fiber amplifier. Pm erbium doped fiber fdhb1500 combines fibercores greatest areas of expertise. It is one of the greatest invention in optical communication. The need to mitigate complex and costly timesharing. High gain pulsed erbiumdoped fiber amplifier for the nonlinear.
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. Pdf multichannel soliton amplification in erbiumdoped. At the heart of edfa technology is the erbium doped fiber edf, which is a. The analytic expressions presented, which involve the solution of one transcendental equation, can predict signal gains and pump absorptions in an amplifier containing an arbitrary number of pumps and signals from. Our line of benchtop optical amplifiers includes ytterbium doped fiber amplifiers ydfas, a praseodymium doped fluoride fiber amplifier pdfa, and erbium doped fiber amplifiers edfas. In fiber amplifiers, low modedependent gain mdg minimizes the loss of capacity and the potential for outage 7.
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. When a normal optical fiber core is doped with trivalent erbium ions, erbium doped fiber is formed. Edfa erbium doped fiber amplifier is a kind of fiber optic amplifier which used to reamplify an attenuated signal without converting the signal into electrical form. By adopting it in conventional optical digital communication system applications, we can save a certain amount of optical repeaters. The user can vary, via windows based input screens, various amplifier characteristics such as fiber length, pump power, signal power, and additional. These high power edfa instruments are 1550nm range cband erbium 1w doped and erbium ytterbium 10w doped fiber amplifiers which offer up to 10 watts of output power. Its core is the erbium doped optical fiber, which is typically a singlemode fiber. Edfa erbium doped fiber amplifier physics and radio.
Article pdf available in international journal of physical sciences 620. 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. In particular, the erbiumdoped fiber amplifier edfa is one example of an optical fiber amplifier that is widely known for use in amplifying optical signals. Erbium doped fiber amplifier 30mw400mw edfa booster amplifier advanced lcd type. Azooz department of electrical engineering, faculty of engineering, university of malaya. 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. 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. Hence, it is named as edfa erbium doped fiber amplifier.
Performance analysis of erbium doped fiber amplifiers and fwm characteristics in a passive optical network. Influence of fiber parameters to the erbiumdoped fiber amplifier. The most common example is the erbium doped fiber amplifier edfa, where the. Erbium fiber amplifiers is a comprehensive introduction to the increasingly important topic of optical amplification. It can be used as pre, inline or power amplifier over a wide temperature range. Erbium doped fiber amplifier, polarization maintaining oem module model no edfacpm20 23 description this polarizationmaintaining erbium doped fiber amplifier is designed as a booster to provide amplification solutions for a broad range of applications, including high speed optical transmission polarization multiplexing, pm transmitter. Our edfa products feature the compact size, low consumption and easy to use.
Figure 1 shows the stark level manifolds of these ions and some important transitions between them. Introduction to erbium doped fiber amplifiers similar to electrical signaling over a wire, optical signals attenuate as they travel through an optical fiber. Edfa erbium doped fiber amplifier tutorial exfiber optical technologies co. A passively modelocked fiber laser is then built up. The first case can be described by a threelevel laser model whereas the second case is a quasithreelevel system. A typical setup of a simple erbium doped fiber amplifier edfa is shown in figure 1. Basic physics of erbiumdoped fiber amplifiers springerlink. Erbium doped fiber amplifier, polarization maintaining oem.
They are simple to operate, affordable benchtop instruments for laboratory research or manufacturing test applications. Bibliography includes bibliographical references p. Introduction erbium doped fiber amplifiers are the by far most important fiber amplifiers in the context of longrange optical fiber communications. The 1480 nm pump beam generates cband amplified spontaneous emission ase in the first part of the edf. It is used in the telecommunications field and in various types of research fields. Erbium doped optical fiber is incorporated a small amount of a rare earth element erbium er ion. The erbium doped optical fiber is usually tens of meters long. It unites the wellestablished core composition of isogain erbium doped fiber edf, with the highly effective bowtie geometry used for polarization maintaining fiber. A description is made of the basic physics and characteristics of erbiumdoped fibers amplifiers edfas. Fundamental design of a distributed erbiumdoped fiber amplifier for. There are three most important types of optical amplifiers. We introduce each of these amplifiers in the following subsections. Device and system developments brings telecommunications professionals up to date. Jan 14, 2016 este video mostra uma animacao do funcionamento do amplificador otico edfa em portugues.
Several parameter sets are included, each of which represents a commercially available type of erbium doped fiber used in different kinds of amplifiers e. Erbium doped fiber amplifier edfa is a high performance, small size of the fiber amplifier products. Miniscalco abstract we have experimentally and theoretically investi gated the effects of detuning the pump wavelength on the gain and noise properties of smallsignal, erbium doped fiber ampli. The emcore mafa 5000 series micro erbium doped fiber amplifier. The erbium doped fiber amplifier provides a way of amplifying all wavelength simultaneously. The metro erbium doped fiber amplifier medfa series edfa is designed for singlechannel or narrow band amplification. Rp photonics encyclopedia tutorial fiber amplifiers, part. The optimum fiber length for maximum gain is determined experimentally.
The erbium fiber has a limit on the coil diameter of about 2 inches to obtain high reliability. Modeling erbiumdoped fiber amplifiers ieee journals. Pdf erbium doped fiber laser and amplifier researchgate. Apr 15, 20 erbium doped fiber amplifier edfa is the first successful optical amplifier invented by the uk southampton university and jp tohoku university. Flatgain wideband erbium doped fiber amplifier by combining two difference doped fibers b. It is first studied an allfibered continuous laser. 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.
Thus we can use erbium doped fiber and pump laser to construct an optical amplifier, which called erbium doped fiber amplifier edfa. Erbium doped fiber amplifiers is a bonafide work done by mr. Voltage standard 100 240v ac auto ranging, 5060 hz power. Erbiumdoped fiber amplifiers are the by far most important fiber amplifiers in the context of longrange optical fiber communications. Gain and noise properties of smallsignal erbiumdoped. When energy in the 1550 nm band travels through the fiber it. Jun 03, 2016 the erbium doped fiber amplifier was the first successful optical amplifier and a significant factor in the rapid deployment of fiber optic networks during the 1990s.
A new method for the simple determination of crosssections 21 2. The born of edfa was the breakthrough in fiber optic communications, it is the erbium doped fiber amplifier that makes long distance and high speed fiber communication possible, edfa is important components used in dwdm and all fiber networks. Fiber amplifiers are developed to support dense wavelength division multiplexing dwdm and to expand to the other wavelength bands supported by fiber optics. Boosting of an optical signal without any conversion of the. 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. Wavelength division multiplexing is a technology for combine number of. This amplified cband ase is then reabsorbed to amplify the lband signal within the remaining of edf. Rp photonics encyclopedia erbiumdoped fiber amplifiers. To compensate for this attenuation, erbium doped fiber amplifiers edfas are commonly used to amplify the optical signal in the 1550 nm range. Erbium yterbium doped fiber amplifier cdata eydfa series are mainly used in am catv, digital catv, fttx pon,which is a high power multiport output optical fiber amplifier. An analytic method is described for fully characterizing the gain of an erbiumdoped fiber amplifier edfa that is based on easily measured monochromatic absorption data. Boosting of an optical signal without any conversion of. Erbium yterbium doped fiber amplifier 2u eydfa cdata.
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. Erbiumdoped fiber amplifiers, device and system developments. Strongly coupled fewmode erbiumdoped fiber amplifiers. Flatgain wideband erbium doped fiber amplifier by combining. The spectroscopic features and laser properties of erbiumdoped silica glass are outlined first,followed by a description of the gain and saturation characteristics of infraredpumped edpa devices. Erbium doped fibers designs are available for conventional cband, lband and reduced clad 80. The 980 nm energy pumps the erbium atom into a slowly decaying, excited state. 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. Soliton amplification in fiber amplifiers has been analyzed using either a parabolicgain profile as in the complex ginzburglandau equation or a lorentzian profile as in the set of maxwellbloch equations. 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. Because the electrons are shielded from external perturbations by the outer orbital, the optical transitions are mainly host independent. Particularly, in this region the erbiumdoped fiber amplifiers edfa are widely used as.
Exciting erbiumdoped planar optical amplifier materials. Erbiumdoped fiber an overview sciencedirect topics. Erbium doped fiber amplifiers pumped in the 980nm band b. White paper introduction to edfa technology optical. Randy giles, member, ieee, and emmanuel desurvire, member, ieee invited paper abstract erbium doped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous, twolevel laser me dium. Gain and noise figure performance of erbium doped fiber amplifiers edfa. Fundamentals of erbium doped fiber amplifiers, 7 2. Pdf gain and noise figure performance of erbium doped fiber. Index terms erbium, erbium doped fiber amplifier, energy level, optical amplifier. High power 1550nm edfa, erbium doped fiber amplifier. Pdf on jan 1, 2014, belloui bouzid and others published erbium doped fiber.
Erbiumdoped fiber amplifier fiber transceiver solution. Polman fominstitute for atomic and molecular physics kruislaan 407, 1098 sj amsterdam, the netherlands abstract erbium doped planar optical amplifiers can find numerous applications in photonic integrated circuits operating at 1. Energy level structure of the trivalent erbium ion, and some common optical transitions. In the last case, there are two levels in the light generation. The effect of the seed light on the gain in the long wavelength region of the erbium doped fiber amplifier may be explained as follows. Fiber lasers, pm amplifiers rightwave highly doped erbium edf, ytterbium and thulium doped edf. Design and development of erbium doped fiber amplifiers. 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 particular, the erbiumdoped fiber amplifier edfa is one example of an optical fiber. Design of multimode erbiumdoped fiber amplifiers for low. The core element of a fiber amplifier is a piece of rareearthdoped fiber, which can provide. 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. Thorlabs also offers a benchtop erbium doped fiber link amplifier developed by our strategic partner. 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.
Its spectral bandwidth is in 1540 1563nm,whichis mainly designed for catv or 1 8 itu wavelength. The erbium doped fiber is pumped with a laser, at a wavelength of 980 nm or 1480 nm and produce. Li, strongly coupled fewmode erbium doped fiber amplifiers with ultralow differential modal gain, in optical fiber communication conference ofc 2020, osa technical digest optical society of america, 2020, paper w4b. Performance analysis of erbium doped fiber amplifiers and.
By cooling the fiber to 77 k, the amplifier gain is. Erbiumdoped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous twolevel laser medium. Available in boost, inline, and preamp configurations, the different models cover various transmission scenarios at points all along the optical communications path. A laser efficiency of 20 % is obtained with an output power of about 8 w for 40 w pumping power. Exciting erbiumdoped planar optical amplifier materials a.
The authors report the measured gain of a highly efficient erbium doped fiber amplifier pumped at wavelengths between 1. Novel splitband erbiumdoped fiber amplifier sciencedirect. Erbium doped fiber amplifier 30mw400mw edfa booster. At least the loss limitation can be partially canceled out by the introduction of optical. Implementation of three functional devices using erbium. An optical fiber is doped with the rare earth element erbium so that the glass fiber can absorb light at one frequency and emit light at another frequency. Optostar 64667c 1550 nm erbium doped fiber amplifier. An erbiumdoped fiber amplifier edfa is a device that amplifies an optical fiber signal. Therefore a population inversion and optical gain can be achieved in the erdoped. The external light is launched with a characterization of a highpower erbiumdoped fiber laser francois sanchez 1, foued amrani, alioune niang, mohamed salhi1, andrey komarov1,2. Validation of the applicability of mccumbers theory to the study of silicabased erbium doped fibers. In addition, remote control of the pump current is supported by sending serial commands via a usb 2. The 9000edfa series are high quality, erbium doped fiber amplifiers used to extend signals in longhaul optical communications applications.
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