A model of nonlinear optical system surrounded by two loops of feedback is investigated. The cell with the
vapor of rubidium Λ - type atoms is taken in the capacity of nonlinear element. Two modes of near-resonant
electromagnetic field interacting with the cell are involved in the feedback. Two-dimensional optical bistability domain
in location of input field intensities is obtained and dependence of its form and magnitude from the system parameters
(photon detunings, feedback factor etc.) is investigated. "Input -output" relations corresponding to different trajectories
in the bistability domain are obtained. Cross-hysteresis is studied.
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George P. Miroshnichenko and Alexander I. Trifanov
Optical bistability in nonlinear system with two loops of feedback
", Proc. SPIE 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics, 79930A (January 7, 2011); doi:10.1117/12.881012; http://dx.doi.org/10.1117/12.881012