Abstract

We have checked whether the frequency ratio between fundamental and second-harmonic optical frequencies is exactly 1:2 by measuring the frequency difference between the second harmonics of two diode lasers and comparing it with the frequency difference of the fundamentals. We have improved the 30-year-old experimental limit on the accuracy of the 1:2 frequency ratio by 7 orders of magnitude for frequency-dependent shifts to 2.3 parts in 10¹³ for a KNbO₃ crystal.

© 1995 Optical Society of America

Homodyne surface second-harmonic generation

P. Thiansathaporn and R. Superfine
Opt. Lett. 20(6) 545-547 (1995)

Second-harmonic-generation-induced optical bistability in prism or grating couplers

R. Reinisch, E. Popov, and M. Nevière
Opt. Lett. 20(8) 854-856 (1995)

Modulational instability in second-harmonic generation

S. Trillo and P. Ferro
Opt. Lett. 20(5) 438-440 (1995)

Grating-assisted phase-matched second-harmonic generation from a polymer waveguide

G. Blau, E. Popov, F. Kajzar, A. Raimond, J. F. Roux, and J. L. Coutaz
Opt. Lett. 20(10) 1101-1103 (1995)

Light-induced second-harmonic generation in an octupolar dye

Céline Fiorini, Fabrice Charra, Jean-Michel Nunzi, Ifor D. W. Samuel, and Joseph Zyss
Opt. Lett. 20(24) 2469-2471 (1995)