Xi'an Institute of Optics and Precision Mechanics,CAS
| 光折晶体的多波混频及其在实时图象自理中的应用研究 | |
| 赵明君 | |
| 学位类型 | 博士 |
| 导师 | 李育林 |
| 1989 | |
| 学位授予单位 | 中国科学院西安光学精密机械研究所. |
| 学位专业 | 光学 |
| 其他摘要 | This thesis studied multi-wave mixing in photorefractive crystals, such as, Fe: LiNbO, SBN, and their application to real-time image processing. The first chapter introduced the development of multi-wave mixing phase conjugation and its recent progress. The second chapter deated with four-wave mixing, including photorefractive effect theory, stable-FWM, varialion pumpwave FWM, and the time response charetristes. The 3rd charpter is studying on real-time correcting distortion via FWM, including one way and double way through distortion medium, in the same time, we used perturbation approximation theory for analysis of phase distortion in-DFWM. It's seen from the caculation result that an important way of increasing the readoutwave's ratio of signal to noise (s/n) is to reduce the resulant distortion of input waves. The 4th chapter, basied on large signal FWM theory, we have demonstrated optical bistablity hyteresis effect in FWM, and the result of experiment (with Fe: KNbO,) is also given. The 5th chapter used the fifth order nonlinear effect theory to explain the new phenomenon observed in our experiment, namely the two-pair conjugation waves produced by a probe wave in the process of the Fe: LiNbO, crystal's DFWM. The 6th chapter applied the FWM phase conjugation to optical associative memory and nearly real-time image substraction and edge enhancement. The 7th chapter studied degenerate six-wave mixing theory and its application to real-time parallelimage processing, logic operation "exOR". The 8th chapter utilized FWM phase conjugation to set up three kinds phase conjugation interferometers. The results of the experiment are also given. |
| 学科领域 | 光学 |
| 页数 | 126 |
| 语种 | 中文 |
| 文献类型 | 学位论文 |
| 条目标识符 | http://ir.opt.ac.cn/handle/181661/12630 |
| 专题 | 中国科学院西安光学精密机械研究所(2010年前) |
| 推荐引用方式 GB/T 7714 | 赵明君. 光折晶体的多波混频及其在实时图象自理中的应用研究[D]. 中国科学院西安光学精密机械研究所.,1989. |
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