Research On Correlated Imaging Through Different Pseudo-thermal Light System

Correlated imaging is first accomplished through using entangled source. However, recently thermal light source is proved to be able to accomplish correlated imaging, which can be got easily. To our disappointment, the coherence time of thermal light source is too short, and its power is too weak, which leads to being hard to detect by usual detector. Therefore, pseudo-thermal light source is often used in the real applications, which is produced by forcing modulation on laser source and can solve those problems above. Pseudo-thermal light source can be got very easily when compared with entangled source, so there must be vast perspective in pseudo-thermal light ghost imaging.In this dissertation, correlated imaging which can be preset is mainly researched. The main research contents are as follows:1. How pseudo-thermal light source and its correlated imaging evolve to the current level and the research focus for correlated imaging by pseudo-thermal light source is summed up.2. The characteristic of pseudo-thermal light source has been analyzed, and the formula in correlated imaging field has been deduced. Four factors that related to the characteristic of pseudo-thermal light source and three merits that measuring the quality of correlated imaging has been summarized and introduced.3. A system of correlated imaging by pseudo-thermal light is designed, and the best modulation method has been researched.4. The impact on correlated characteristic of pseudo-thermal light source from coherence of laser source has been researched and simulated, which offers guidance for the experiment in the future.