Giant subthreshold amplification in synchronously pumped optical parametric oscillators

G. D'Alessandro, F. Papoff

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Synchronously pumped parametric oscillators have been shown to have subthreshold giant amplification of such a magnitude that a macroscopic, entirely noise-driven, signal is present at output even when the device is below threshold. In this paper we quantify the magnitude of the amplification factor in terms of some key device parameters. We use non-normal operator theory to find the noise amplification factor (Kreiss constant) and show that the signal amplitude is proportional to it. We also determine that the noise sensitivity depends in a nontrivial way on the group velocity of the three fields.
LanguageEnglish
Article number023804
Number of pages8
JournalPhysical Review A
Volume80
Issue number2
DOIs
Publication statusPublished - Aug 2009

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parametric amplifiers
group velocity
operators
thresholds
output

Keywords

  • generalized stability theory
  • quantum images
  • pulse-compression
  • noise
  • operators
  • laser
  • fluctuations
  • mechanism

Cite this

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Giant subthreshold amplification in synchronously pumped optical parametric oscillators. / D'Alessandro, G.; Papoff, F.

In: Physical Review A, Vol. 80, No. 2, 023804, 08.2009.

Research output: Contribution to journalArticle

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AU - Papoff, F.

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N2 - Synchronously pumped parametric oscillators have been shown to have subthreshold giant amplification of such a magnitude that a macroscopic, entirely noise-driven, signal is present at output even when the device is below threshold. In this paper we quantify the magnitude of the amplification factor in terms of some key device parameters. We use non-normal operator theory to find the noise amplification factor (Kreiss constant) and show that the signal amplitude is proportional to it. We also determine that the noise sensitivity depends in a nontrivial way on the group velocity of the three fields.

AB - Synchronously pumped parametric oscillators have been shown to have subthreshold giant amplification of such a magnitude that a macroscopic, entirely noise-driven, signal is present at output even when the device is below threshold. In this paper we quantify the magnitude of the amplification factor in terms of some key device parameters. We use non-normal operator theory to find the noise amplification factor (Kreiss constant) and show that the signal amplitude is proportional to it. We also determine that the noise sensitivity depends in a nontrivial way on the group velocity of the three fields.

KW - generalized stability theory

KW - quantum images

KW - pulse-compression

KW - noise

KW - operators

KW - laser

KW - fluctuations

KW - mechanism

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DO - 10.1103/PhysRevA.80.023804

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JO - Physical Review A - Atomic, Molecular, and Optical Physics

T2 - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

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