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Semiconductor Optical Amplifier (SOA)
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A semiconductor optical amplifier (SOA) works in a similar way to a basic laser. The structure is much the same, with two specially designed slabs of semiconductor material on top of each other, with another material in between them forming the 'active layer'. An electrical current is set running through the device in order to excite electrons which can then fall back to the non-excited ground state and give out photons. Incoming optical signal stimulates emission of light at its own wavelength. SOA can be classified into two groups, Fabry-Perot Amplifiers (FPA) and Traveling Wave Amplifiers (TWA). The difference is the reflectivity coefficient value of both mirror surfaces. Products & Services
Fiber optic amplifiers re-amplify an attenuated signal without converting the signal into electrical form.
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Etalons are two flat glass plates separated by a parallel spacer, with the inner surfaces of the plates coated with a partially reflecting layer.
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Atomic emission and optical emission spectrometers determine analyte concentration via a quantitative measurement of the optical emission from excited atoms.
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Optical switches are optoelectric devices, consisting of a light source and a detector that produces a switched output.
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Photosensor modules are compact light detectors with built-in power supplies. They use photomultiplier tubes, avalanche photodiodes, PN photodiodes, or PIN photodiodes.
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Topics of Interest
5.1 Introduction
At the time of this writing, the solution most frequently used in commercial applications is amplification in erbium-doped single-mode fibers (EDFA). Today, such amplifiers allow...
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SEMICONDUCTOR OPTICAL AMPLIFIERS
Semiconductor optical amplifiers (SOA's) are essentially laser diodes, without end mirrors, which have fiber attached to both ends. They amplify any optical signal...
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In using semiconductor optical amplifiers (SOA) as optical amplifiers, the linear operating regime is preferred. Operating the SOA in the linear regime allows for exact amplified replica of the input...
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Scattering and absorption mechanisms in an optical fiber cause a progressive attenuation of light signals as they travel along a fiber. At some point the signals need to be amplified so that the...
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8.2 Systems Analysis
8.2.1 Introduction
The time-domain techniques (Chapter 7) for solving the electromagnetic interactions in lasers have led to powerful and efficient routines which are...
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