Abstract

Linear optical amplifiers are described quantum mechanically by a linear differential equation with Langevin operator noise sources. Even if the gain medium is composed of fermions, in the limit when the amplifier is a linear amplifier, the noise sources must have bosonlike commutation relations. I show in detail how the Tomonaga approximation produces the bosonic commutators of the noise sources.

© 2001 Optical Society of America

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Equations (24)

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