Title :
Optical signal processing using nonlinear semiconductor microring resonators
Author :
Van, V. ; Ibrahim, T.A. ; Absil, P.P. ; Johnson, F.G. ; Grover, R. ; Ho, P.-T.
Author_Institution :
Lab. for Phys. Sci., College Park, MD, USA
Abstract :
Recent fabrication advances have enabled compact semiconductor microring resonators to be fabricated with high-finesse values and picosecond cavity lifetimes. These devices have potential applications in optical signal processing as all-optical switches, multiplexers and logic gates. Theoretical analysis shows a maximum reduction in the switching power proportional to the fourth power of the field enhancement in the microring. An enhancement in the wavelength conversion efficiency by four-wave mixing which is proportional to the eighth power of the field enhancement is also predicted and experimentally confirmed. Experimental results demonstrating bistability, picosecond switching using pump and probe excitation, optical time-division demultiplexing, spatial pulse routing and four-wave mixing in GaAs-AlGaAs microring resonators are reported. Apart from the bistable response, which was thermally induced, the nonlinear effects observed in the microrings were caused by the two-photon absorption process. Applications of microrings to realize all-optical logic gates are also proposed
Keywords :
III-V semiconductors; aluminium compounds; demultiplexing; gallium arsenide; high-speed optical techniques; micro-optics; multiwave mixing; optical bistability; optical logic; optical pumping; optical resonators; time division multiplexing; two-photon processes; GaAs-AlGaAs; GaAs-AlGaAs microring resonators; all-optical logic gates; all-optical multiplexers; all-optical switches; bistability; bistable response; compact semiconductor microring resonators; field enhancement; four wave mixing; four-wave mixing; high finesse values; nonlinear effects; nonlinear semiconductor microring resonators; optical signal processing; optical time-division demultiplexing; picosecond cavity lifetimes; picosecond switching; probe excitation; pump excitation; spatial pulse routing; switching power; thermally induced; two-photon absorption process; wavelength conversion efficiency; Four-wave mixing; Logic devices; Logic gates; Multiplexing; Optical device fabrication; Optical resonators; Optical signal processing; Optical switches; Optical wavelength conversion; Power semiconductor switches;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2002.1016376
