EDFA


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Related to EDFA: Raman amplifier, Oadm

EDFA

[′ed‚fä or ¦ē¦dē¦ef′ā]
(communications)

EDFA

(Erbium-Doped Fiber Amplifier) A device that boosts the signal in an optical fiber. Introduced in the late 1980s, the EDFA was the first successful optical amplifier. It was a major factor in the rapid development of fiber-optic networks in the 1990s, because it extended the distance between costly regenerators. In addition, an EDFA amplifies all the channels in a WDM signal simultaneously, whereas regenerators require optical to electrical conversion for each channel.

A Laser Without Mirrors
Functioning like a laser without mirrors, the EDFA uses a semiconductor pump laser to introduce a powerful beam at a shorter wavelength into a section of erbium-doped fiber several meters long. The pump light excites the erbium atoms to higher orbits, and the input signal stimulates them to release excess energy as photons in phase and at the same wavelength. EDFAs boost wavelengths in the 1550 nm range, and the pump light is typically 1480 nm or 980 nm. See EDWA, WDM, Raman amplifier and optical amplifier.


Erbium-Doped Fiber Amplifier
EDFAs boost the input regardless of the number of wavelengths. In several meters of doped fiber, the pump laser excites the doped atoms to higher orbits, and the input signal stimulates them to release excess energy as photons in phase and at the same wavelength. (Illustration courtesy of Jeff Hecht.)
References in periodicals archive ?
This stand-alone unit is redundancy hot swap power module which can mix plug in 110/220VAC and 48VDC bias (package E) and has dedicated digital and analog circuitry for precise control of the EDFA along with alarms and monitors," said Samuel Hu, product manager of FiberStore.
Yossi Boker, RED-C's President & CEO, commented: "Leveraging our proven expertise with EDFA and Raman technology, RED-C now offers a unique suite of solutions for the fiber access market, which is one of the fastest growing segments in optical communications.
EDFA is a type of optical amplifier, characterized by the addition of erbium to the core of optical fiber.
To this end RED-C has expanded its existing Hybrid Raman-EDFA product line to include a new model comprising three Raman pumps and one EDFA pumps.
The optimization and tight integration of the Raman pump unit and the variable gain EDFA in a single module allows for improved performance compared to using two separate modules, in addition to the cost and space savings achieved by combining the two units together.
Low Latency Single Stage EDFA - provides all the functionality of a standard EDFA, with up to 70% reduction in the optical path latency.
Standard MSA size (7" x 5") featuring integrated tunable DCM and EDFA functionality
The 3RU platform, which supports up to six hot-swappable pump laser diodes, is specifically designed for very high power Raman/ ROPA and EDFA applications, and thus complements RED-C's existing 1RU products, which support up to three pumps.
28 /PRNewswire-FirstCall/ -- Avanex Corporation a pioneer of intelligent photonic solutions that enable next-generation optical networks, today announced the release of a hot-pluggable EDFA, which is fully compatible with the industry-standard Xenpak chassis.
This full featured variable gain (VG) EDFA module is provided in a compact 70x90mm footprint package and is software and hardware compatible to standard Multi-Source Agreement (MSA) 70x90 Fixed Gain (FG) EDFAs.
Avanex's other amplification solutions such as its PureGain(TM) 2600 Variable Gain EDFA for Metropolitan Networks and PureGain(TM) 5500 Variable Gain EDFA for Long-Haul Networks are recognized as industry leaders.
First in a series, the WaveSmart PowerNode 1550 EDFA offers custom wavelengths and user-defined power output levels for the distribution of optical signals and long distance transmission relay in conjunction with the 1550nm optical transmitters for CATV and FTTH systems.