Considerations of noise and schemes for its reduction in laser amplifiers

1 January 1964

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IEEE

Vol. 52 (2) , 165-172
https://doi.org/10.1109/proc.1964.2805

Abstract

Spontaneous emission adds noise to the signal in laser amplifiers. In this paper the radiation characteristics of this noise and structures to reduce it are discussed. The structures make use of the spatial directionality of coherent light, and consist of aperture stops in combination with lenses. Their ultimate performance is studied. Signal-beam configurations necessary for optimum signal-to-noise (SNR) are described.

Keywords

NOISE REDUCTION
LASER NOISE
OPTICAL AMPLIFIERS
LENSES
LASER MODES
APERTURES
SIGNAL TO NOISE RATIO
OPTICAL NOISE
MASERS
STIMULATED EMISSION

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