Abstract

The Cerenkov-radiation scheme for second-harmonic generation (SHG) has been extensively studied since it was first proposed.¹ However, the obtainable SHG power is necessarily limited to a relatively low level in comparison with a slab guide scheme. Thus far, we have reported about the Cerenkovian SHG in the slab guide with an organic polymer at both the 1.06 and 2.94 μm lines.^2,3 In this paper we propose a new efficient scheme for Cerenkov-radiative SHG, in which the nonlinear optical (NLO) susceptibility χ⁽²⁾ is corrugated along the beam axis in the guiding layer of the slab waveguide. This is theoretically analyzed to show how the SHG power is enhanced, together with its experimental demonstration.

© 1992 Optical Society of America