论文信息 - Observation of quadratic spatial solitons in periodically poled lithium niobate.

Observation of quadratic spatial solitons in periodically poled lithium niobate.

We report what are to our knowledge the first observation and characterization of quadratic spatial solitons in periodically poled lithium niobate (PPLN). Using a Nd:YAG (1064-nm) source, we observed self-trapped solitary-wave propagation over more than six diffraction lengths as a result of the cascaded quadratic nonlinear process. Low-threshold operation (5-kW peak power) was measured for the quasi-phase-matched PPLN structure designed for frequency doubling.

[1] Alain Barthélémy,et al. Propagation soliton et auto-confinement de faisceaux laser par non linéarité optique de Kerr , 1985 .

[2] David J. Hagan,et al. χ(2) cascading phenomena and their applications to all-optical signal processing, mode-locking, pulse compression and solitons , 1996 .

[3] S Trillo,et al. Optical solitons supported by competing nonlinearities. , 1995, Optics letters.

[4] Stegeman,et al. Observation of two-dimensional spatial solitary waves in a quadratic medium. , 1995, Physical review letters.

[5] L. Torner,et al. Spatial switching of quadratic solitons in engineered quasi-phase-matched structures. , 1999, Optics letters.

[6] George I. Stegeman,et al. Soliton evolution in quasi-phase-matched second-harmonic generation , 1997 .

[7] N. Bloembergen,et al. Interactions between light waves in a nonlinear dielectric , 1962 .

[8] C. B. Clausen,et al. Spatial Solitons and Induced Kerr Effects in Quasi-Phase-Matched Quadratic Media , 1997 .

[9] D. C. Hanna,et al. Quasi-phase-matched blue light generation in bulk lithium niobate, electrically poled via periodic liquid electrodes , 1994 .