Ultrafast AmplifiersGain SaturationDetrimental Effects of High GainAmplifier NoiseGenerally, amplifiers do not only amplify any intensity or phase noise of the input, but also add some excess noise. This applies not only to laser amplifiers, where excess noise can partly be explained as the effect of spontaneous emission, but also to nonlinear amplifiers. The noise figure e.g. of a fiber amplifier is a measure for how much exces...See more on rp-photonics Wikipedia
Optical amplifier - Wikipedia
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
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