Optical bistability in nonlinear system with two loops of feedback

TL;DR

This paper investigates optical bistability in a nonlinear system with two feedback loops, analyzing how system parameters influence bistability domains and hysteresis behaviors in a rubidium vapor-based optical setup.

Contribution

It introduces a model of a nonlinear optical system with dual feedback loops and explores the bistability domain and hysteresis phenomena in detail.

Findings

Two-dimensional bistability domain characterized by input field intensities.

Dependence of bistability form and size on system parameters.

Observation of cross-hysteresis effects.

Abstract

A model of nonlinear optical system surrounded by two loops of feedback is investigated. The cell with the vapor of rubidium - 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.