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
Original Manuscript: July 17, 2012
Revised Manuscript: September 5, 2012
Manuscript Accepted: September 5, 2012
Published: October 5, 2012
Sara Tofighi, Somayeh Safari Farshemi, Batool Sajjad, Fatemeh Shahshahani, and Ali Reza Bahrampour, "Optical bistability in fiber ring resonator containing an erbium doped fiber amplifier and quantum dot doped fiber saturable absorber," Appl. Opt. 51, 7016-7024 (2012)