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International Journal of Optics
Volume 2012, Article ID 431826, 4 pages
Research Article

Minimum Total Noise in Wave-Mixing Processes

1Department of Applied Physics, University Institute of Engineering and Technology, Kurukshetra 136 119, India
2Department of Applied Physics, S.K. Institute of Engineering and Technology, Kurukshetra 136 118, India
3Department of Physics, Kurukshetra University, Kurukshetra 136 119, India

Received 1 November 2011; Accepted 9 February 2012

Academic Editor: Nicusor Iftimia

Copyright © 2012 Savita Gill et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Higher-order squeezing in different optical processes such as seven-wave mixing and five-wave mixing has been studied. The total noise of a field state is a measure of the fluctuations of the field amplitude. It is shown that the minimum total noise () of a higher-order squeezed state always increases with the increase in nonclassicality associated with higher-order squeezing. Thus, from , one can conclude that highly nonclassical states have large amplitude fluctuations.