Nonlinear Cascaded Femtosecond Third Harmonic Generation by Multi-grating Periodically Poled MgO-doped Lithium Niobate

• 作者: Shuanggen Zhang Wenchao You Zhangchao Huang
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 工学
• 关键词: FEMTOSECOND Third HARMONIC GENERATION Second HARMONIC GENERATION Cascaded NONLINEAR Process
• 年，卷（期）: 2013,（2）
• 页码范围: 50-52
• 页数: 3页
• 分类号: TN2

摘要

Nonlinear cascaded femtosecond third harmonic generation was experimentally investigated pumped by 100 fs pulses at optical communication band 1550 nm using a multi-grating 5 mol. % MgO-doped periodically poled lithium niobate crystal. The optimized efficiency of 10.8% was achieved with the simultaneous phase-matching of the second harmonic and sum frequency process. And the third harmonic spectrum reached as broad as 8.7 nm because of the choosing of a small group velocity mismatching between the fundamental and second harmonic pulses. Nonlinear cascaded method will provide a reference for the efficient frequency conversion in the high intensity range.