Abstract

The efficiency of second-harmonic generation for a pump wave at 1.06 μm in Ag⁺−Na⁺-exchanged channel glass waveguides has been measured. Different polarization combinations of fundamental and second-harmonic waves have been investigated and the efficiency has been found to be of the order of 10⁻¹⁵ for a pump power of 6 kW. Our calculations show that this value can be explained by gradient terms in the nonlinear polarization.

© 1992 Optical Society of America

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