Abstract A composite system consisting of a degenerate optical parametric oscillator (DOPO) and N two-level atoms interacting with a broadband squeezed vacuum (SV) centred at frequency $\omega_{\rm s}$ and an input monochromatic pumping field with a frequency $\omega_{\rm p}$ is analysed. The corresponding explicit analytical steady-state solutions in the central mode $\omega_{\rm p}=\omega_{\rm s}$ are derived, and the result displays optical bistability (OB). In addition, the influence of the broadband SV on the bistable behaviour is analysed in detail.
Received: 22 October 2004
Revised: 04 April 2005
Accepted manuscript online:
PACS:
42.65.Pc
(Optical bistability, multistability, and switching, including local field effects)
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