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 ?
Lembrikov, "All-Optical AGC of EDFA based on SOA", IEEE J Quantum Electron.
Amplifier part consists of EDFA physical model itself along with optical multiplexer and 980 nm co-propagating continuous wavelength pumping laser.
Figure 7 shows the standard deviation (normalized to the signal level at bit '1') of signal-ASE beat noise, XPM-induced intensity noise and pattern-dependent Ramancrosstalk-induced intensity noise due to signal-signal Raman interaction SSRI as a function of the signal channel 6 (worst channel) For 80x10 Gb/s EDFA under optimized dispersion map.
As with the entire Hybrid Raman-EDFA product line, the new model provides seamless integration of a distributed Raman pre-amplifier and a variable gain EDFA in a single compact module.
8~ The link consists of an externally modulated distributed feedback (DFB) laser transmitter emitting at 1553 nm; an EDFA postamplifier; an attenuator; a 50 km fiber spool; 26 identical sections comprising an EDFA and a |is greater than~ 50 km fiber spool; and an avalanche photodiode receiver preceded by an attenuator and an optical filter.
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.
Beside a broad variety of EDFA and Raman modules, RED-C offers innovative and comprehensive solutions for some of the industry's most difficult technological challenges today, such as 100 Gb/s and 40 Gb/s coherent transmission, ultra-long repeaterless links, and low latency networks.
Standard MSA size (7" x 5") featuring integrated tunable DCM and EDFA functionality
RED-C's introduction of the VG EDFA in a 70x90mm footprint package enables a flexible approach to amplifier design, whereby FG and VG EDFAs can be mixed and matched on the same line card to support all amplifier configurations, such as: single stage, dual-stage with mid-stage access, and East/ West separation for ROADM applications.
The WaveSmart PowerNode 1550 EDFA features low noise figure, high gain, optimized structure and high reliability for 1550nm optical transmission networks.
The UltraSpan Inline Amplifier supports all of RED-C's EDFA modules such as single stage, fixed gain or variable gain EDFAs, dual stage EDFAs with mid-stage access for DCF, or two separate EDFA modules within a single unit for providing bidirectional amplification.
NR8360JP-BC, EDFA gain module (C-band, +35 dB or better gain small signal gain, Max power output: 10 mW or better) along with accessories, Laser diode driver with TEC controller, maximum supply current 500 mA, bench top module, accessories power chords, cables, connectors, software etc must be included.