光学学报, 2001, 21 (4): 397, 网络出版: 2006-08-10  

用光谱分辨的双光束耦合方法测量χ(2)(2)级联非线性相移

χ(2)(2) Cascaded Nonlinearity Measurements by Spectrally Resolved Two-Beam Coupling
作者单位
中国科学院上海光学精密机械研究所,上海 201800
摘要
针对重要的χ(2):χ(2)级联非线性相移,在理论上论证了可以用光谱分辨的双光束耦合方法来测量χ(2):χ(2)级联非线性相移,在实验上研究了飞秒时域级联非线性相移随波矢失配量的变化规律。这一新颖的测量方法灵敏度高、实际使用简单,应用低能量的飞秒激光振荡器,就能方便地测量微弱χ(2)晶体的级联非线性相移。
Abstract
Aimed for the applications of χ(2):χ(2) cascaded second-order nonlinear phase shifts, it is theoretically proved that this nonlinear phase shifts can be measured by spectrally resolved two-beam coupling. The dependence of the cascaded nonlinear phase shifts on the phase mismatching in femtosecond time scald is investigated experimently. The proposed novel approach has advantages of high sensitivity and easy to be applied. The cascaded nonlinearities of weak χ(2) crystals can be measured easily by use of low energy femotosecond laser oscillators.
参考文献

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詹庭宇, 朱宝强, 顾震, 钱列加. 用光谱分辨的双光束耦合方法测量χ(2)(2)级联非线性相移[J]. 光学学报, 2001, 21(4): 397. 詹庭宇, 朱宝强, 顾震, 钱列加. χ(2)(2) Cascaded Nonlinearity Measurements by Spectrally Resolved Two-Beam Coupling[J]. Acta Optica Sinica, 2001, 21(4): 397.

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