We numerically demonstrated a new chaos-synchronization scheme using incoherent feedback to the pumping power of two microchip lasers. The feedback control is applied to the pumping power of the slave laser by using a difference signal between the peak heights of electrical fields of two lasers. Synchronization of chaos is achieved under certain values of the gain parameters. This synchronization is required for matching the laser parameters because the dynamics of population inversion need to be matched between the two lasers by controlling the pumping power. (C) 2002 Elsevier Science Ltd. All rights reserved.
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