| 热释电效应对光折变全息光栅读出的影响 |
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| 引用本文： | 佘卫龙,余振新,雷德铭.热释电效应对光折变全息光栅读出的影响[J].物理学报,1996,45(10):1655-1659. |
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| 作者姓名： | 佘卫龙 余振新 雷德铭 |
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| 作者单位： | (1)中山大学激光与光谱学研究所; (2)中山大学物理系 |
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| 摘 要： | 先用两束０.２７ｍＷ的６３２.８ｎｍＨｅ-Ｎｅ激光在掺Ｍｎ的ＫＮＳＢＮ晶体中记录光折变全息光栅，再用波长为６２１.８ｎｍ的准连续染料激光读出，观察到衍射光信号有一个从初始最大值衰减到稳定最小值的暂态过程．初始值对稳定值的比可达７.５以上．这一现象可用热释电效应的影响进行解释
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| 关 键 词： | 热释电效应 光折变 全息 光栅读出 |
| 收稿时间： | 1995-07-20 |
PYROELECTRIC AFFECTION ON THE READOUT OF PHOTO-REFRACTIVE HOLOGRAPHIC GRATING |
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| SHE WEI-LONG,YU ZHEN-XIN and LEI DE-MING.PYROELECTRIC AFFECTION ON THE READOUT OF PHOTO-REFRACTIVE HOLOGRAPHIC GRATING[J].Acta Physica Sinica,1996,45(10):1655-1659. |
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| Authors: | SHE WEI-LONG YU ZHEN-XIN and LEI DE-MING |
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| Abstract: | The photorefractive holographic grating in a Mn doped K1-yNayBa2-xSrxNb5O15 (KNSBN) is written with two 0.27mW He-Ne laser beams (632.6nm) and is read with one quasicontinuous dye laser beam (621.8nm, 1.6mW or less). It is found that the Bragg diffracton suddenly reaches its maximum at the beginning and then decays to its minimum with a time constant of about 0.6s. The ratio of the maximum to the minimum can be higher than 7.5. A theory including pyroelectric effect has been developed and it fits the experiment well. |
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