Erbium–Ytterbium-Doped Fiber-Based Optical Flip-Flop

Erbium-ytterbium-doped fiber absorption and fluorescence are exploited to realize an optical bistable device. An all-optical flip-flop with 10-ns transition time, 18.48-nJ set, and 19.82-nJ reset energies, is experimentally demonstrated. The possibility to reach an extinction ratio of more than 8 dB is demonstrated as well