论文部分内容阅读
提出用 Ｃ Ｏ２ 激光加热后记录固定的方案对 Ｌｉ Ｎｂ Ｏ３ 晶体中的全息进行实时实地局域热固定。通过加载绝热体， 利用连续激光加热晶体待固定区域局部范围至接近２００℃， 停止加热开始记录， 至该区域温度降至 １００℃时， 将固定一个体全息。文中给出了热传导模型及其数值解。由得到的初步结果参数进行了一系列实验。实验结果显示， 应用这种方案可成功地对光折变全息进行实时实地局域热固定， 并且具有温度更均匀的特点， 所固定的全息质量有较大改善
It is proposed that real-time and local local heat fixation of the holograms in LiNbO3 crystal by the recording and fixing scheme after C O2 laser heating. By loading the insulator, the laser is used to heat the local area of the crystal to be fixed to near 200 ° C., the heating is stopped and the recording is started. When the temperature in the area drops to 100 ° C., a volume hologram is fixed. The paper gives the heat conduction model and its numerical solution. A series of experiments were carried out from the preliminary results obtained. The experimental results show that this scheme can be used successfully for real-time local thermal fixation of photorefractive holography with a more uniform temperature, and the fixed holographic quality is greatly improved