摘要
用波长为５３２ｎｍ的高斯光束入射到掺杂的ＫＮＳＢＮ晶体中，对足够大的光强，观察到由热自聚焦效应诱导产生的光折变非对称自散焦．非对称自散焦的空间分布与性质都有别于噪声受激放大．它对自泵浦相位共轭无甚贡献．
The phenomenon of photorefractive asymmetrical self defocusing induced by thermal self focusing is observed when a Gaussian beam at 532nm with high enough intensity is focused onto a KNSBN crystal. The spatial distribution and physical properties of the asymmetrical self defocusing are different from those of stimulated noise scattering. It is found that asymmetrical self defocusing has no contribution to self pumped phase conjugation. The diameter of the beam when asymmetrical self defocusing first appears in the crystal is estimated.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第12期2022-2026,共5页
Acta Physica Sinica
基金
广东省自然科学基金
