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We demonstrate fast optical arbitrary waveform generation by using MEMS digital micro-mirror arrays. Experimentally, we obtain ∼120MHz waveforms that can be controlled by using 1024×768 mirror arrays. 1GHz waveforms reconfigurable in 1µs are also achievable.
This communication reviews recent work on time-domain processing, e.g. temporal correlation, time integration and differentiation, real-time Fourier transformation etc., of broadband microwave signals using incoherent lightwave systems based on the time-spectrum convolution concept.
Interactions of in-phase quiescent gap solitons in a system of two linearly-coupled Bragg gratings with dispersive reflectivity are investigated. It is found that the interactions may lead to merger, destruction, or separation of solitons.
Novel optical dispersion spectroscopy has been developed with a dynamic range of 2500 ps/nm and a resolution of < 1 ps/nm. It was realized using dual-heterodyne mixing with 25 GHz- and 2 GHz-optical frequency combs.
A new design of vertical waveguide is investigated for on-demand three-dimensional light guiding in three-dimensional photonic crystals. Optical characterization successfully demonstrates that the wide-band vertical guiding is realized in a fabricated photonic crystal.
We present two dual types of Si-based hybrid photonic-plasmonic structures for extreme light concentration. Both structures are ultra-compact (length < 1µm) and highly efficient.
A novel nanophotonic waveguide for light confinement in low-index media is reported in this paper. Waveguide modal properties have been evaluated by the 3D Finite Element Method. Dependence of both confinement factor and propagation length on waveguide size has been investigated. Finally, waveguide group velocity dispersion and waveguide sensitivity have been calculated. The numerical results we have...
A comparative study of the performance of 10 GHz, semiconductor-based comb sources is presented with regard to the optical linewidth, stability of the comb modes, total optical bandwidth and timing jitter.
We studied a plasmonic graded grating structure that can simultaneously generate third harmonic ultraviolet light of different wavelengths at different positions along the grating. Such broadband discrete ultraviolet generation is achieved through surface dispersion engineering.
We present real-time experimental results using high-overhead, high-gain FEC to overcome impairments caused by XPM in dispersion-compensated metro/regional WDM networks that combine 10G OOK and 40G DP-QPSK channels.
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