Abstract

The discovery of efficient second harmonic generation in phosphorous-doped glass optical fibers¹ has prompted considerable interest, as this is normally a dipole forbidden process. The two main questions are, first, by what mechanism is the second harmonic generated, and, second, how is the process phase-matched. A model which ad dresses these questions has recently been proposed.^2,3 We present the results of experiments designed to test the model and further elucidate the mechanism responsible for this effect.

© 1987 Optical Society of America