The edfa module is compact and light weight, compact structure, easy installation and debugging, high. Lumentum offers the most comprehensive portfolio of highperformance amplifiers raman, high power edfas, wide dynamic gain range edfas, edfa arrays in the industry. Today, we are going to study and compare different types of optical amplifiers in this paper. An erbiumdoped waveguide amplifier or edwa is a type of an optical amplifier. Ha5400e optical amplifier adopts the worlds top class pump laser and active optical fiber. Optical amplifier archives tutorials of fiber optic products. Introduction to optical amplifiers 517 an edfa with a counter propagating pump is pictured in figure 6. 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. Optical amplification has been already successfully tested in various laboratories and field trials in europe, north america and japan.
Edfa erbiumdoped fiber amplifier is an optical device used to compensate optical signal attenuation caused by fibers and components, to increase optical transmission distance. Semiconductor optical amplifier working principle in a raman amplifier, the signal is intensified by raman amplification. Optical fiber transmission has revolutionized networking and communication systems. White paper introduction to edfa technology june 2009 1 introduction shortly after their commercialization in the early 1990s, erbium doped fiber amplifiers edfa s became a key enabling technology for optical communication networks, and have since comprised the vast majority of all optical amplifiers deployed in the field.
Edfa works to directly amplify any input optical signal, eliminating the need. Optical amplifiers are important in optical communication and laser physics. Our line of benchtop optical amplifiers includes ytterbiumdoped fiber amplifiers ydfas, a praseodymiumdoped fluoride fiber amplifier pdfa, and erbiumdoped fiber amplifiers edfas. 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. It is used in the telecommunications field and in various types of research fields. The structure of the erbiumdoped fiber amplifier is shown in the figure below. Worldwide standards authority is still working on the standardization of edfa optical amplifier. Perfect apc, acc and atc control, excellent design in the ventilation and heatdissipation ensure the long life and high reliable work of pump laser. Different from oeo, it can directly amplify the signal of multiwavelength from the cband to effectively extend the transmission distance when the optical signal is not enough to meet the requirement of the optical transmission distance. Thorlabs also offers a benchtop erbiumdoped fiber link amplifier developed by our strategic partner. Edfa works best in the range 1530 to 1565 nm, and it possesses low noise and can amplify many wavelengths simultaneously, making it the.
As a market and technology leader in optical amplifiers for over two decades, lumentum leverages vertical integration and deep knowhow to continue to offer points of. It enables instantaneous amplification for signals with multiple wavelengths. Gain spectrum, gain saturation, and amplifier noise. The term doping refers to the process of using chemical elements to facilitate results. However, when it comes to the distance up to hundreds of kilometers, to amplify the. The most common example is the erbium doped fiber amplifier edfa, where the core of a silica fiber is doped with. This device is an optical amplifier for passive amplification of optical signals in the 1550nm channel band. Introduction of optical amplifier tutorials of fiber. The copropagating geometry produces an amplifier with less noise and less output power.
The term doping refers to the process of using chemical elements to facilitate results through the manipulation of electrons. Edfa stands for erbium doped fiber amplifier and it is one type of many. Its key components are erbiumdoped fiber, highpower pump source, wavelength division multiplexer combiner that is multiplexed as signal light and pump light, and light feedback and reduce system noise, optical isolator used at the input and output. Amplifier booster, to increase the output power at the beginning of the link pre amplifier preamp, high input sensitivity. China catv 1550nm module edfa optical amplifier module.
Edfa erbium doped fiber amplifier physics and radioelectronics. 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. The counter propagating geometry produces a noisier amplifier with high output power. Thorlabs corepumped erbiumdoped fiber amplifiers edfas offer 20 dbm 100 mw output power with a low noise figure of edfa with minimal sensitivi.
An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Erbium doped fiber amplifier edfa used in wdm system. At least the loss limitation can be partially canceled out by the introduction of optical. 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. Edfa modules also include necessary electronic circuitry to monitor and control the optical fiber amplifier operation. Edfa is an optical amplifier that amplifies the optical signal directly, without the need to first convert it to an electrical signal. Edfas use a pump laser 980 nm or 1480 nm to bring up electrons to a higher energy level. We have a series of erbiumdoped fiber amplifier edfa optical amplifiers, including dwdm edfa for dwdm systems, catv edfa for catv applications, sdh. Erbium doped fiber amplifier edfa is the latest stateoftheart solution for amplifying optical signals in optical transmission systems. Raman amplifier archives tutorials of fiber optic products. A typical setup of a simple erbiumdoped fiber amplifier edfa is shown in figure 1. Erbiumdoped fiber amplifier edfa is an optical repeater device that is utilized to boost the intensity of optical signals being carried through a fiber optic communications system. Edfa erbium doped fiber amplifier physics and radio. Erbiumdoped fiber amplifier module is the professional catv equipment which is used for amplifying optical signal then transmission in the catv transmission system.
The working principle of edfa is same as that of lasers. In 1985, where the invention of erbiumdoped fiber amplifier edfa has attracted great interest in the field of communica. Its a short video on optical amplifiers and basically discussed about edfa. The arris fa3500 series is a family of high output, extremely compact 1550 nm optical amplifiers edfas in singlewidth modules with output powers ranging from 14 to 21 dbm. Erbium dopped fiber amplifier edfa basics, working. Edfa amplifier is the most common optical amplifier, used for boosting optical signals in optical applications, especially the dwdm systems.
In addition to this, the network upgrading is cost effective with optical amplifiers. Before the comparison of the different types of optical amplifiers, lets take a closer look at fiber optic amplifier. Rack mount edfa is a high quality optical amplifier. It adopts 980nm or 1480nm high linearity, optical isolation, the dfb, thermoelectric cooling dfb laser produced by jdsu, fujitsu, nortel, lucent, fitel and other worldrenowned semiconductor companies as the pumping source. Edfa is an optical device that amplifies the optical signals without optoelectronic and electro optical conversion. Edfa can amplify a wide wavelength range 1500nm1600nm simultaneously, which just satisfies the dwdm application, hence it is very useful in wdm for amplification. An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. Optical amplifier edfa erbiumdoped fiber amplifier for wdm. With edfa, an erbiumdoped optical fiber at the core is pumped. Rack mount edfa high power erbiumdoped optical fiber. Thorlabs optical amplifiers are available as complete benchtop systems or as pigtailed butterfly packages. Edfa erbiumdoped fiber amplifier, firstly invented in 1987 for commercial use, is the most deployed optical amplifier in the dwdm system that uses the erbiumdoped fiber as optical amplification medium to directly enhance the signals.
How does edfa amplifier work for extending dwdm system. Doped fiber amplifier edfa modules for the arris chp headend optics platform are designed to increase signal transmission distance, making them ideal optical amplification solutions for long links. It has become a key enabling technology and the dominant amplification device deployed in optical networks. Edfa, semiconductor optical amplifier soa and fiber raman amplifier.
Digital or analog interfaces can be provided with tailored functions and control levels, depending on the system architecture. Erbiumdoped optical fiber amplifiers edfas have low noise and can amplify many wavelengths simultaneously, making the edfa the amplifier of choice for most applications in optical communications. By adopting it in conventional optical digital communication system applications, we can save a certain amount of optical. If signal amplification is achieved by emitted photons of the same signal wavelength with the help of stimulated emission. It is a close relative of an edfa, erbiumdoped fiber amplifier, and in fact edwas basic operating principles are identical to those of the edfa. Optostar 64667c 1550 nm erbium doped fiber amplifier. Unlike the edfa and soa the amplification effect is obtained by a nonlinear interaction between the signal and a pump laser within an optical fiber. The erbiumdoped fiber amplifier edfa is the most deployed fiber amplifier. Both of them can be used to amplify infrared light at wavelengths in optical communication bands between 1500 and 1600 nm.
The signals and pump are combined through a wdm coupler and launched into an erbiumdoped fiber. It also supports all itu50 ghz and itu25 ghz dwdm grid channels. Multiple communication devices, like optical transmitters and receivers, are used in optical fiber. The edfa was the first successful optical amplifier and a significant factor in the rapid deployment of fiber optic networks during the 1990s. In general, edfa works on the principle of stimulating the emission of photons. In this video, i have covered erbium dopped fiber amplifier edfa with following outlines. Erbium doped fiber amplifier introductionfiber optic solutions. Figure 3 illustrates a simplified energy diagram of er, showing how amplification takes place at 1550 nm. Major telecom manufactures already supply line terminals with integrated optical amplifier functions. Together with dwdm technology, edfa has made it possible to transmit data over long distance.
This unit provides 22 dbm edfa constant output optical amplifier for 1550nm. Increasing the power level at the end of the transmission line according to receiver sensitivity. Three different amplifier types booster, inline amplifier, and pre amplifier can be used depending on the required distance and existing locations. The optostar 64667c 1550 nm edfa is microprocessor controlled to real time monitor and control. Erbium doped fiber amplifier edfa is the latest stateoftheart. It is the key amplification device deployed in the optical system to enhance the signal power, so that the optical transmission distance can. They enable the characterization of the gain, noise figure, and output power under unsaturated and saturated signal input regime.
Optical amplifier archives fiber optic cabling solutions. Introduction to erbium doped fiber amplifier edfa in optical communication network, signal travels through fibers in every large distances without significant attenuation. An optical fiber amplifier is a fiber optic device used to amplify optical signals directly without conversion into electrical signals. Dwdm edfa has a high optical signal to noise ratio osnr.
The top left picture shows a simple diagram of how edfa works. 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. Erbiumdoped fiber amplifier edfa is an optical repeater device that is utilized to boost the intensity of optical signals being carried through a. The basic configuration for incorporating the edfa in an optical fiber link is shown in the picture below. Opa1550p series 1550nm erbium doped fiber amplifier pluggable ps is a kind of edfa with dual power supply hotpluggable. Dual amplifier versions, which provide two optically independent amplifiers in a singlewidth module, are also available. An erbiumdoped fiber amplifier edfa is a device that amplifies an optical fiber signal.
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