Amplification of noise in the quantum theory of parametric processes

J. Janszky, Yu Ya Yushin

Research output: Contribution to journalArticle

6 Citations (Scopus)


A quantum mechanical treatment is given of the acousto-optical parametric amplification processes in dielectric crystals when the signal acoustical and idler light waves are amplified in the presence of intensive optical pumping. The approximate Heisenberg equations of motion are found and solved for the creation and annihilation operators of signal and idler modes with due regard for the interaction of these modes with other light and vibratory modes of the crystal ("the thermostat"). It is shown that the thermostat influence results in noise and attenuation effects. These persistent noises are also amplified. If the pumping is not far above the threshold the persistent noises are more important than the initial ones.

Original languageEnglish
Pages (from-to)299-303
Number of pages5
JournalOptics Communications
Issue number4
Publication statusPublished - Apr 15 1982

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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