Electro-optically tuned non-critically phase matched second harmonic generation of Nd:YAG laser in LiNbO₃ crystal

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• 作者：Ruma Debnath^a ; Preeti Kumari^b ; Ardhendu Saha^a ; ^{arsagtwave@gmail.com} ; ^{arsagtwave@yahoo.com}
• 关键词：Electro-optic effect ; Non-critical phase matching (NCPM) ; Second harmonic generation (SHG) ; Acceptance angle ; Effective nonlinear coefficient
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：132
• 期：Complete
• 页码：232-235
• 全文大小：446 K
• 卷排序：132

文摘

We report analytically an electro-optically tuned non-critical phase-matched second harmonic generation of a diode pumped solid-state laser in LiNbO3 crystal at room temperature (25 °C).The direction of propagation of fundamental wave of 1064 nm is on x-y plane, making an angle of θ = 90° with z-axis and ϕ = 33° with x-axis of the crystal. By applying an electric field of −7.87 kV/mm along z-axis of the crystal, ordinary and extra ordinary refractive indices of fundamental wave and second harmonic wave are matched to each other respectively. The calculated angular acceptance is 55.7 mrad mm1/2.