We demonstrate a 10GHz optical clock recovery scheme based on optical parametric oscillator using highly nonlinear photonic crystal fiber as the dynamic gain medium.

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.

An optical switch structure based on total internal reflection effects in intersecting silicon oxynitride waveguides has been designed and successfully fabricated. The optical reflection losses of the waveguides have been analyzed and compared with experimental results. It was shown that, apart from materials and scattering losses, the major factors contributing to the reflection losses are waveguide width, reflection facet displacement, and reflection facet tilt angle, with the last factor being the most critical in deciding the overall loss of the device.

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.