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Quantum Optics$
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John Garrison and Raymond Chiao

Print publication date: 2008

Print ISBN-13: 9780198508861

Published to Oxford Scholarship Online: September 2008

DOI: 10.1093/acprof:oso/9780198508861.001.0001

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Linear optical amplifiers*

Linear optical amplifiers*

Chapter:
(p.499) 16 Linear optical amplifiers*
Source:
Quantum Optics
Author(s):

J. C. Garrison

R. Y. Chiao

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198508861.003.0017

This chapter begins by specializing the general definition of optical amplifiers to a special class of linear amplifiers that includes all those in common use. Amplifiers are divided into the categories of phase insensitive or phase sensitive, and each of these categories is subdivided into the categories of traveling-wave or regenerative. Illustrative examples are given for each of the four types. This is followed by a general description of single-input, single-output linear amplifiers that includes the input-output equation, the conditions for phase insensitivity, and the constraints imposed by unitarity. This general theory is used to determine the noise limits for linear amplifiers. The general amplifier uncertainty principle obtained in this way shows that there are noise free amplifiers.

Keywords:   phase insensitive, phase sensitive, traveling wave, regenerative, input-output equation, unitarity, amplifier uncertainty principle, noise free amplifier

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