Abstract
The Distributed Feedback Parametric Oscillator built in APE PPLN waveguide is characterized as a high efficient, arbitrary single frequency generation, and compact device. Theory of DFB OPO waveguide is derived and the calculated threshold is around 0.1W for . We assume the length of the DFB grating is the same with the PPLN, which is 4cm long. The parametric process involves 800nm pumping laser and the signal wavelength is 1530nm (also be the Bragg wavelength). The threshold is 40 times lower if we compare DFB OPO for bulk and waveguide. The major achievement of this dissertation is the development of the distributed feedback grating on the annealed proton exchange waveguide. Modeling and optimizing of the DFB grating is given. Around 9% transmission drop at 1529.18nm with FWHM 0.0189nm is measured. The fitted DFB coupling strength is 0.1/cm while the theoretical value is 0.6 /cm. The imperfect lithography grating and the end facets reflection lower the effective feedback strength. The Quasi Phase Matching technique is used for frequency conversion process. In the near future, a good quality DFB grating would be fabricated with high reflectivity and narrow bandwidth; DFB OPO waveguide could be demonstrated and explored.