Title :
Periodic spatial instabilities of high intensity beams in nonlinear waveguides
Author :
Stegeman, G.I. ; Schiek, Roland ; Fang, Haiyang ; Malendevich, R.
Author_Institution :
Sch. of Opt., Univ. of Central Florida, Orlando, FL, USA
Abstract :
Summary form only given. In self-focusing media a plane wave of infinite extent breaks-up into a periodic array of individual intensity maxima. This has been reported in bulk quadratic and photorefractive media, but not in slab waveguides for which analytical theories exist. Modulational instability (MI) leading to periodic structures has been demonstrated for SHG in LiNbO/sub 3/ slab waveguides, in excellent agreement with theory. Furthermore, by seeding the periodic patterns, the MI gain coefficients were measured, and again good agreement with theory.
Keywords :
lithium compounds; optical harmonic generation; optical self-focusing; optical waveguides; stability; LiNbO/sub 3/; LiNbO/sub 3/ slab waveguides; MI gain coefficients; SHG; high intensity beams; individual intensity maxima; modulational instability; nonlinear waveguides; periodic array; periodic patterns; periodic spatial instabilities; self-focusing media; slab waveguides; Laser beams; Nonhomogeneous media; Nonlinear optics; Optical arrays; Optical harmonic generation; Optical waveguides; Periodic structures; Photorefractive effect; Slabs; Solid state circuits;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2001. QELS '01. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-663-X
DOI :
10.1109/QELS.2001.961990
