https://doi.org/10.1140/epjd/e2003-00045-5
Multimode squeezed states produced by a confocal parametric oscillator
1
INFM, Università dell'Insubria, Dipartimento di
Scienze CC FF MM, Via Valleggio 11, 22100 Como, Italy
2
Laboratoire Kastler Brossel,
Université Pierre et Marie Curie, Case 74, 75252 Paris Cedex 05, France
Corresponding author: a alessandra.gatti@mi.infn.it
Received:
25
September
2002
Published online:
11
February
2003
We investigate the spatial behaviour of the quantum-noise-reduction spectrum of the vacuum state emitted by a degenerate optical parametric oscillator below threshold. In view of possible experimental implementations, we consider a mode–degenerate resonator and two matching lenses and show that, for the realistic case of a finite–width pump, significant level of squeezing can be observed in a very small region of the beam.
PACS: 42.50.Dv – Nonclassical field states; squeezed, antibunched, and sub-Poissonian states; operational definitions of the phase of the field; phase measurements / 42.65.Yj – Optical parametric oscillators and amplifiers / 42.60.Da – Resonators, cavities, amplifiers, arrays, and rings
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
