Abstract
In this paper we study the optical bistability in a double coupler fiber ring
resonator which consists of an erbium doped fiber amplifier (EDFA) in half part
of the fiber ring and a quantum dot doped fiber (QDF) saturable absorber in the
other half. The bistability is provided by the QDF section of the ring
resonator. The EDFA is employed to reduce the switching power. The transmitted
and reflected bistability characteristics are investigated. It is shown that the
switching power for this new bistable device is less than 10 mW.
© 2012 Optical Society of America
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