Abstract

We demonstrate here the significant effect relative phase fluctuations have on seeded second harmonic generation (SHG) in optical fibers. A changing relative phase between IR (1.06 μm) and green (0.532 μm) seeding beams results in a continuous washing-out of the χ⁽²⁾ grating. Consequently only a weak SH signal is observed immediately after seeding. A stable relative phase on the other hand increases the seeded second harmonic (SH) intensity by approximately a factor of 10³.

© 1990 Optical Society of America