声光调Q衍射效率对脉宽压缩的影响研究

通过对衍射效率和反转粒子数密度的关系，反转粒子数密度和脉冲宽度的关系的分析，得出当通过提高泵浦速率来压缩脉宽时，衍射效率必须与泵浦速率和重复频率相匹配.并提出了匹配条件，从匹配条件出发又得到了衍射效率与泵浦速率和重复频率的匹配关系式.关系式中的衍射效率即为能够有效地压缩脉宽的最小衍射效率.实验结果与理论分析符合较好.

Study on the Effect of Diffraction Efficiency on Pulse Compression of A-O Q-switched Laser

The relationship between the two thresholds of inversion density in Q-switched laser, high Q value threshold and low Q value threshold is acquired.Through analyzing the relationship between pulse width and population inversion density and the relationship between diffraction efficiency and population inversion density,a conclusion is obtained that the pulse compression is gotten by increasing pumping rate only when diffraction efficiency is matched up to pumping rate and repetitive frequency in A-O Q-switched laser.And the matching formula between diffraction efficiency and pumping rate is acquired by the match condition.The diffraction efficiency in the formula is just the minimum one to effectively compress the pulse.The theoretical results are verified by the experiments.