Compared with before optimization, outcomes of optimization increase 4% in the ratio of stroke and 14.5% in the force amplification.

将优化前后的结果相比较，行程比增加4%，力的放大倍数增加14.5%。

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In chapter four, the optimization of quasi-phase matched CSHG is demonstrated. Parametric amplification in the Cerenkov-idler configuration is modeled and analyzed theoretically.

第四章论述了准相位匹配切伦科夫倍频的优化，理论分析和模拟了准相位匹配切伦科夫型参量放大。

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