Silicon oxynitride rectangular optical waveguides have been fabricated by plasma-enhanced chemical vapor deposition and dry etching. The propagation loss and polarization dependent loss in as-grown samples show a substantial reduction after the samples have been annealed. Birefringence measurements before and after annealing on waveguides of different widths suggest that the waveguide modal birefringence is strongly affected by both waveguide geometry and stress in the material. Hence, the modal birefringence can be minimized by designing the appropriate waveguide geometry to compensate for any stress effects.

We demonstrate a 40 Gb/s optical clock recovery based on optical parametric oscillator using a highly nonlinear photonic crystal fiber as the dynamic gain medium.

We demonstrate a 10 Gbit/s nonreturn-to-zero wavelength converter based on four-wave mixing in a 20m highly nonlinear photonic crystal fiber. The tunable wavelength conversion bandwidth 3dB is about 100nm. The conversion efficiency is -16dB when the pump power is 22.5dBm. Phase modulation was not used to suppress the stimulated Brillouin scattering; thus the linewidth of the converted wavelength remained very narrow. The eye diagrams show that there is no additional noise during wavelength conversion. The measured power penalty at a 10-9 bit-error-rate level is about 0.7dB.

An optical switch structure which combines a planar lightwave circuit and liquid crystal is proposed and experimentally demonstrated. The switching is realized by inducing total internal reflection through controlling the refractive index of the liquid crystal. The principle and the design of the integrated optical switch are described. Experimental results suggest that anchoring of the liquid crystal molecules on nonplanar structures is very crucial in affecting the switching performance.

We demonstrate the novel flat-top modulational instability gain for a wide range of modulation frequencies in the anomalous dispersion regime of highly dispersive and nonlinear media. All the analytical results are compared with numerical simulation.