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Distributed Measurement of Signal Power Evolution in a Phase Sensitive Parametric Amplifier

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Luc Thévenaz, Camille Sophie Brès, Marcelo Alfonso Soto Hernandez, Andrey Denisov, Fatemeh Alishahi
2014

Résumé

A method to measure the signal power evolution along phase-sensitive parametric amplifiers is proposed using Brillouin optical time-domain analysis. Different evolutions along the fiber are reported by varying input wave phases, including amplification and de-amplification.

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https://infoscience.epfl.ch/entities/publication/c53a8609-40b3-41ac-990a-549c670e060c

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Concepts associés (10)

A bass amplifier (also abbreviated to bass amp) is a musical instrument electronic device that uses electrical power to make lower-pitched instruments such as the bass guitar or double bass loud enough to be heard by the performers and audience. Bass amps typically consist of a preamplifier, tone controls, a power amplifier and one or more loudspeakers ("drivers") in a cabinet. While bass amps share many features with the guitar amplifiers used for electric guitar, they are distinct from other types of amplification systems, due to the particular challenges associated with low-frequency sound reproduction.

Equalization (audio)

Equalization, or simply EQ, in sound recording and reproduction is the process of adjusting the volume of different frequency bands within an audio signal. The circuit or equipment used to achieve this is called an equalizer. Most hi-fi equipment uses relatively simple filters to make bass and treble adjustments. Graphic and parametric equalizers have much more flexibility in tailoring the frequency content of an audio signal.

Un subwoofer, ou familièrement abrégé en sub, est un haut-parleur destiné à la reproduction des fréquences sonores les plus basses du spectre audio (dites "graves"), confondu par synecdoque (amalgame) avec le caisson de basses (également orthographié caisson de basse, désignant le boitier dans lequel est enfermé un tel haut-parleur). Ce type d'enceinte acoustique est présent sur de très nombreux équipements audio (comme dans les systèmes dits 2.1, 4.1, 5.1, 7.1, le .

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