Abstract
In this experiment, we designed a wavelength tunable pulse pump source and demonstrated the optical parametric generation (OPG) in annealed-proton-exchanged (APE) periodically poled lithium niobate (PPLN) waveguides. The pump source is tunable. With a tuning range started from 772 nm to 777 nm and has a stable peak power of nearly 112 W with pulse width 8.9 ns before it was coupled into the waveguide. The results showed a wide tuning range of OPG signal and idler from 1350 nm to 1800 nm, and a degeneracy wavelength was located at 1553 nm. Further more, we attached a fiber Bragg grating on both end face of the waveguide to process the distributed Bragg reflector (DBR) optical parametric oscillation (OPO). The fiber grating was fabricated by ultraviolet writing with phase mask technology. The UV wavelength was 244 nm with an intensity of 150 (mW/cm2). After UV exposure, the fiber Bragg grating has reflection higher than 99% between 1550 nm to 1551.2 nm, and the reflectivity reached the maximum value (99.9%) at 1550.8 nm. In the thesis, we also calculated the OPO threshold versus different DBR reflectivity in singly resonant oscillation (SRO) condition. Finally, we found the SRO threshold is around 4.013 watt (peak power) in this experiment.