Picosecond Nonlinear Optical Responses in Photorefractive Crystals,
Abstract
Picosecond-pulse laser excitation was used to establish and probe refractive index gratings in KNbO3, KTaO3, and mixed crystals. The purpose of this work was first to identify the physical processes contributing to fast nonlinear optical responses in these samples and second to determine how these processes evolve with time into the space-charge field photorefractive effect observed with continuous wave excitation. The techniques of pulse-probe degenerate four-wave mixing and nondegenerate four-wave mixing with a continuous wave probe laser were both employed to obtain information about the photorefractive processes that take place after fast pulse excitation.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP006781
Entities
People
- Hanxiao Liu
- R. C. Powell
- R. J. Reeves
Organizations
- Oklahoma State University–Stillwater