Abstract

In 1999, we presented the theoretical background for a non-resonant, recirculating type-II doubling system[1]. Secondharmonic generation (SHG) gain is proportional to the square of the incident fundamental irradiance. In the case of type-II SHG, it is proportional to the product of the incident fundamental irradiance in the two orthogonally polarized eigenstates. The standard method for type-II SHG is to rotate the incident polarization to be at 45° to the eigen-polarization. In this manner, the incident field is decomposed into orthogonal components, each with half the incident fundamental power.

© 2002 Optical Society of America