428971.fig.003a
(a) Bulk
428971.fig.003b
(b) Bulk
428971.fig.003c
(c) Waveguide
428971.fig.003d
(d) Waveguide
Figure 3: Power fluctuations of fundamental and SH waves in undoped PPLN crystal measured in the time domain. It is shown that the SH wave has higher peak-to-peak fluctuation than that of the fundamental wave; and for either wave, the waveguide leads to higher noise than the bulk crystal.