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Optimization of highly efficient terahertz generation in lithium niobate driven by Ti:sapphire laser pulses with 30 fs pulse duration

Xiaojun Wu, Shusu Chai, Jinglong Ma, Baolong Zhang, Chenyi Xia, Zhaoji Fang, Deyin Kong, Jinguang Wang, Hao Liu, Changqing Zhu, Xuan Wang, Cunjun Ruan, and Yutong Li

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Abstract

We systematically study the optimization of highly efficient terahertz (THz) generation in lithium niobate (LN) crystal pumped by 800 nm laser pulses with 30 fs pulse duration. At room temperature, we obtain a record optical-to-THz energy conversion efficiency of 0.43% by chirping the pump laser pulses. Our method provides a new technique for producing millijoule THz radiation in LN via optical rectification driven by joule-level Ti:sapphire laser systems, which deliver sub-50-fs pulse durations.

© 2018 Chinese Laser Press

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