Dependence Of Generation Efficiency Research Articles

Optimization of second harmonic generation in non-linear film structure

The problem about optimization of second harmonic generation (SHG) by a laser beam in a non-linear medium with dimensions less than the beam size has not been solved yet. We present a theoretical method providing an optimization of SHG in the case of non-linear film non-waveguide structure. We have found that even in the case of perfect phase matching there is an optimum length for maximum non-linear interaction. The dependence of generation efficiency on different type of non-linear profiles has been established and related with experimental results.

Power-generation potential of various IMPATT structures from a scaling approximation

The power potential of the double-drift and both complementary 1-sided silicon IMPATTS is estimated as a function of frequency, using a scaling approximation that accounts for the dependence of generation efficiency on bias-current density. The results show the n+–p junction IMPATT to be a superior choice for reliable power generation below 25 GHz, owing to its relatively low threshold-current density.