摘要
采用365nm的门光束和633nm的记录光,在LiNbO3∶Fe∶Cu晶体中实现了双色记录和无损读出。通过适当的预敏化,在门光束光强与记录光强分别为20mW/cm2和390mW/cm2时,得到的灵敏度和饱和衍射效率分别为0.004cm/J和37%。同时还研究了LiNbO3∶Fe∶Cu晶体中的暗保存时间、光擦除时间常数以及用脉冲光作门光束时的双色存储性质。
Two-color holographic recording and nondestructive readout were implemented in a LiNbO3:Fe,Cu crystal, for the first time to our knowledge, with gating at 365 nm and recording at 633 nm. The recording sensitivity and the saturated diffraction efficiency reached 0.004 cm/J and 37% respectively under proper pre-sensitization conditions. The time constants of dark decay and optoerasure for gratings recorded in this crystal by two-color holography are further investigated. The two-color technology with pulsed-laser gating light is also described.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2004年第5期594-598,共5页
Journal of Optoelectronics·Laser
基金
国家重点基础研究与发展计划(973)资助项目(G19990330)
北京市教委科技发展计划资助项目(05006012200201)
关键词
双色全息存储
无损读出
LiNbO3:Fe:Cu晶体
时间常数
光折变晶体
Copper compounds
Holography
Iron compounds
Laser pulses
Lithium niobate
Nondestructive readout
Optical recording
Photorefractive materials
