Title :
Femtosecond measurement of cascaded second-order nonlinearities by spectrally resolved two-beam coupling
Author :
Liu, Xindong ; Qian, Liejia ; Wise, Frank
Author_Institution :
Dept. of Appl. Phys., Cornell Univ., Ithaca, NY, USA
Abstract :
Summary form only given. The cascading of second-order processes under phase-mismatched conditions can lead to a Kerr-like nonlinearity. Large nonlinear phase shifts of either sign can be produced by the cascade process. It is known that this phase shift can be severely distorted owing to group velocity mismatch (GVM) between the fundamental pulse and its harmonic. Measurement of the temporal behavior of the cascade nonlinear phase on the femtosecond time scale is essential to its application in femtosecond devices. We show that the magnitude and dynamics of the cascade nonlinearities can be determined using spectrally resolved two-beam coupling (SRTBC) with femtosecond pulses.
Keywords :
high-speed optical techniques; multiwave mixing; nonlinear optical susceptibility; optical Kerr effect; optical phase matching; Kerr-like nonlinearity; cascade nonlinear phase; cascade nonlinearities; cascade process; cascaded second-order nonlinearities; dynamics; femtosecond devices; femtosecond measurement; femtosecond pulses; femtosecond time scale; fundamental pulse; group velocity mismatch; harmonic pulse; magnitude; nonlinear phase shifts; phase shift; phase-mismatched conditions; second-order processes; spectrally resolved two-beam coupling; temporal behavior; Chemicals; Fabry-Perot; Nonlinear optics; Optical distortion; Optical films; Optical pulses; Optical pumping; Phase distortion; Phase measurement; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-595-1
DOI :
10.1109/CLEO.1999.834158
