optical amplifier

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Related to Optical amplifiers: Optical amplification, Erbium Doped Fibre Amplifier

optical amplifier

[′äp·tə·kəl ′am·plə‚fī·ər]
(engineering)
An optoelectronic amplifier in which the electric input signal is converted to light, amplified as light, then converted back to an electric signal for the output.

optical amplifier

A device that boosts light signals in an optical fiber network. Unlike regenerators, which have to convert light to electricity in order to amplify it and then convert it back again to light, the optical amplifier amplifies the light signal itself. Developed in the late 1980s, the erbium-doped fiber amplifier (EDFA) was the first successful optical amplifier. See EDFA.
References in periodicals archive ?
In order to cope with these issues, optical amplifiers are used before and after the optical fiber cable.
Professor Peter Andrekson, who leads optical communication research at Chalmers University of Technology said that the demonstration shows how amplifiers can 'significantly, and simultaneously' reduce the impact of noise accumulation--originating from optical amplifiers in the link--and of signal distortion from nonlinear effects in the transmission fibre.
Caption: Figure 1: The principle of multiple-frequency optical mm-wave signals generation using DP-MZM and FWM in SOA for ROF system LD: laser diode, MZM: Mach-Zehnder modulator, OC: optical coupler, OS: optical splitter, SOA: semiconductor optical amplifier, TOF: tunable optical filter, and PD: photodio.
Adams, "Amplified spontaneous emission in semiconductor optical amplifiers: modelling and experiments," Optics Communications, vol.
Three multi-core optical amplifiers fabricated by NEC, KDDI Research, NTT, and Furukawa were inserted at each end of three spans in order to compensate the signal attenuation.
On the other hand, Forzati, Berntson, and M[grados]artensson (2008) demonstrate that asynchronous phase modulation increases transmission for the NRZ-OOK system in ultra-long distance WDM systems; in the same line of analysis, we find Alzate and Cardenas (2011), who highlight advanced modulation formats for the transmission of 40/100Gb/s, compared to the standard technology of 10Gb/s, on optical fiber in short and long distance, as well as some degradations caused by: noise produced by optical amplifiers, chromatic dispersion, PMD and effects of fiber nonlinearities.
Xtera supplies both un-repeatered and repeatered systems, using its high performance optical amplifiers to deliver traffic directly inland to cities.
Established in 1998 and based in the UK (Harold Wood, Essex) and the US (Allen, Texas), Xtera supplies un-repeatered and repeatered sub-sea systems, using high performance optical amplifiers to carry data.
WDM and optical amplifiers which are generally EDFAs are the key parameters of these systems.
A cascade of two optical amplifiers were added to increase the power of the generated lines.
Because transferring of the optical signal over great distances leads to its attenuation, the transmission path contains optical amplifiers. In optical communication the EDFA fibre amplifiers, SOA semiconductor amplifiers, or amplifiers based on the Raman effect are the most widely used ones [2-4].
The step and gradient refractive index profile and Rhodamine B, Rhodamine 6G, and Oxazine 4 optical amplifiers were presented [27-30].

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