Fiber Optics Products used in the Fiber Optical Transmission

Many fiber optic applications amplification from the optical transmission. For example, long-haul DWDM techniques, Previously, it uses expensive electronic of the optical signal every 100 kilometres. The current contemporary long-haul DWDM techniques make use of a number of sophisticated optical elements to change several repeaters having a solitary optical gadget. These types of optical products are used widely in the fiber optic network.

Fiber Optic Video Transmission

The fiber used in a EDFA which actually doped along with erbium, the uncommon planet component which has the right energy within it’s atomic framework in order to enhance gentle from 1550 nm. The 980 nm or even 1480 nm “pump” laser beam injects power to the erbium-doped fiber. Whenever a fragile transmission from 1550 nm makes its way into the actual fiber, the actual encourages the actual erbium atoms release a their own saved power because extra 1550 nm gentle. This method proceeds since the transmission goes by lower the actual fiber, developing more powerful as well as more powerful till this gets to the actual erbium-doped area.

The figure showed the two-stage EDFA mid-stage entry, an essential component of high overall performance fiber optic techniques. In this instance, 2 easy single-stage EDFAs tend to be packed collectively. The consumer gets the actual result from the very first phase EDFA and also the enter from the 2nd phase EDFA. These types of techniques frequently need the actual regular utilization of extra components. Putting the actual DCF in the mid-stage entry stage from the two-stage EDFA decreases dangerous results about the program. The consumer nevertheless understands substantial obtain with the EDFA, actually with the help of the actual higher optical reduction bit of DCE.

two stage

EDFAs prevent the majority of energetic elements simply because photons enhance the actual transmission. The actual EDFA supplies a higher result energy, needing less amplifiers inside a provided program style. The standard EDFA style amplifiers gentle on the pretty thin, just 12 nm. The actual add-on associated with obtain equalization filter systems may boost the music group in order to a lot more than twenty five nm. Additional unique doped materials boost the amplification group in order to forty nm or even more. In addition, information price self-reliance within EDFAs indicates something update demands altering just the actual release as well as obtain terminals.

The actual EDFA’s dependable overall performance causes it to be helpful within long-haul, higher information price fiber optic marketing communications techniques as well as CATV shipping techniques. Within CATV programs, EDFA’s increase the transmission prior to as well as following a good optical splitter in order to enhance the actual divided transmission with regard to more than a number of materials. Generally, 4 main programs can be found with regard to optical amplifiers: energy amplifier/booster, in-line amplifiers, preamplifier or even reduction payment with regard to optical systems.

EDFA Amplifier

Scientists created erbium-doped fiber amplifiers (EDFAs) to change several numerous electronic repeaters along with less optical repeaters, general decreasing program price as well as intricacy EDFAs, like the figure, permit easy techniques updates with the addition of extra resources in order to various wavelengths as well as mixing all of them on to just one fiber utilizing a DWDM multiplexer.


In-line Amplifier

The actual in-line amplifier or even inline repeater requires a little enter transmission as well as increases this with regard to retransmission lower the actual fiber. Managing the actual samll transmission overall performance as well as sound will give you much better program outcomes. Sound additional through amplifiers within sequence may restrict the machine duration.

Booster amplifier

Enhancer amplifier they fit straight following the optical transmitter. The actual EDFA should produce the most feasible result degree i’m regards to the actual big transmission enter. Little transmission reaction isn’t because essential since the immediate transmitter result is generally 10 dBm or more. The bigger SNR from the inbound indicators offers much less effect compared to results from the sound additional through the amplifier.

Have a Special Look at Fiber Optic Amplifier

Wiki of Fiber Optic Amplifier

An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics.

Standard of Fiber Optic Amplifier

We know Fiber Optical Amplifiers that design from simple single stage to more complex multistage amplifiers with variable gain evolved as a different viator for system performance by equipment manufacturers and were initially made in house. More recently, the equipment vendors outsourced the design and manufacturing of amplifiers to the component vendors while requiring more than one source in order to control cost and delivery risk. This led to a pseudo-standardization of optical amplifiers with three or four vendors making amplifiers with compatible optical, mechanical,electrical hardware, and software specification.

Optical amplifier is dominated by erbium-doped fiber amplifiers and the leading suppliers have been shipping amplifiers for 10 years or longer. These companies include Oclaro, JDS Uniphase, and Furukawa. Ovum estimates these companies enjoy more than 60% market share of the nearly 200 dollars merchant erbium-doped fiber amplifier market in 2008. Well Fiberstore’s In-line Amplifier is on hot sale.

There are another 25 companies fighting for the remaining revenues. Twenty-one of the remaining optical amplifier companies that still exist today started between 1997 and 2003. All the amplifier suppliers in low cost regions started between 1998 and 2003. And only two new amplifier suppliers have entered the market since 2003, Manlight and Titan Photonics. The Figure showed the optical amplifier for next WDM networks

optical amplifier

Optical Amplifier: Present Status

After nearly five years of focus on cost reduction and reduces progress in innovation. New direction in optical amplifier technology are becoming visible. These are in response to the major trends for the amplified optical networks of higher degree of connectivity and introduction of channels at higher data rates. Agility in amplifiers will be key to the successful deployment of ROADM networks requiring seamless provisioning and recovery in the event of failures. Features such as fast gain control at sub millisecond timescale and rapid spectral adjustments to counter the impairments due to higher order effects (spectral hole during[SHB], Raman spectral tilt in fiber, and polarization dependent loss [PDL]) of components) will be needed on an integrated basis across the whole system. Likewise, continuous demand to increase the OSNR of the signals to support ever increasing channel rates to 100 Gb/s and beyond over ultra-long-haul distances will require every dB to be made available, for example by deployment of hybrid Raman/EDFAs at every repeater site in the network. Another trend is the deployment of high-power cladding pumped amplifiers with watts of output power in the access network for distribution of video and other content. From the commercial standpoint, however, since the industry has become addicted to 15% to 20% price reduction year to year, these new features will have to be delivered at negligible incremental cost.

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Optical Amplifiers Applied into the Fiber Optic Networks

As we know, most optical amplifier amplify client light through stimulated emission. An optical amplifier is nothing but a laser without feedback. Optical gain is achieved when the amplifier is pumped optically or electrically to achieved population inversion. Optical amplification depends on:

  • Frequency (or wavelength) of incident signal
  • Local bean intensity

General applications of optical amplifiers are:

  • In-line Amplifier
  • Pre-amplifiers
  • Power Amplifier

The Figure shows basic operation of optical amplifier


The external pump source energy us absorbed by the electrons in the active medium. The electros shifts to the higher energy level producing population inversion. Photos of incoming signal triggers these excited electros to lower level thourhg a stimulated emission peocess, producing amplified opticla signal.


Breif Introduction

The active medium in an optical fiber amplifier consists of a nominally 10 to 30m length of optical fiber that has been lightly doped with a rare-earth element such as Erbium, Ytterbium, Neodymium or Praseodymium. The host fiber material can be either standard silica, a fluoride-based glass or a multicomponent glass.

The operating regions of these devices depends on the host material and the doping elements. Fluorozirconate glasses doped with P or N are used for operation in the 1300-nm window, since newither of these ions can amplify 1300 nm signals when enbedded in the silica glass.

The most popular material for long haul telecommunication application is a silica fiber doped with Erbium, which is known as Erbium-doped fiber amplifier or EDFA. The operation of an EDFA by itself normally is limited to the 1530 to 1560 nm region.


  • Active medium is created by erbium, ytterbium, neodymium, praseodymium
  • DFA can pump device at several different wavelength.
  • Low coupling loss
  • Constant gain.

Today’s Key recommendation product: C-band 40 Channels Booster EDFA for DWDM Networks

Booster EDFA

The DWDM-EDFA-BA-O23 Booster Amplifier is an easy-to-use and cost-efficient device for DWMD fiber optic link amplification which operates at the transmission side of the link. It is designed to amplify aggregated optic input power for reach extension. Using dual-stage pump laser design and internal Gain Flattening Filter (GFF) to compensate the erbium fiber gain variation, it features high input power, low noise, and up to output power:23dBm. Software control is standard via an RS-232 interface for status monitoring and pump current adjustments.


  • Booster Amplifier, carries whole C-Band 1528nm ~ 1561nm of 40 channel on metro DWDM distance extension or single wavelength distance extension application
    100GHz channel spacing
  • input power:-5~+10dBm
  • output power:23dBm
  • Low Noise Figure: Typical 4.5dB
  • High Flatness: Typical 1dB
  • 19” 1RU rack enclosure
  • SC/UPC, SC/APC, FC/UPC, FC/APC, LC/UPC, LC/APC , ST/UPC and ST/APC connectors are available
  • Single or dual 110VAC, 220VAC, 100~240VAC and/or -48VDC power supply
  • Reliable 980nm and 1480nm pump lasers
  • 10 years of operation life
  • 3 years warranty standard
  • Compatible with Telecordia GR-1312-CORE
  • OEM is available

Fiberstore is a quite professional store to sale EDFA amplifier and splitter, we can have a detailed description and product detail pictures, and the most rewarding part is that Fiberstore has a quite reasonable price, such as the aoove product, it just 3683 dollars at such good quality.