Física i Cristal·lografia de Materials i Nanomaterials (FiCMA-FiCNA) and Centre de Recerca en Enginyeria de Materials i Micro i Nanosistemes (EMaS), Universitat Rovira i Virgili (URV), Campus Sescelades, C/Marcel·lí Domingo s/n E-43007 Tarragona, Spain.
Opt Lett. 2011 May 15;36(10):1881-3. doi: 10.1364/OL.36.001881.
Efficient Type II phase-matching second-harmonic generation of a 1125 nm fundamental beam has been obtained using Ba:Yb:Nb:RbTiOPO(4)/RbTiOPO(4) waveguides grown by liquid phase epitaxy. The refractive indices of the epitaxial layer have been measured at different wavelengths, and the Sellmeier coefficients of the chromatic dispersion curves have been obtained. The phase-matching curve shows that the Ba(2+) doping in RbTiOPO(4) contributes to increase the phase-matching range until 900 nm. The measured effective refractive indices of the propagation modes agree well with the theoretical calculations.
利用液相外延法生长的 Ba:Yb:Nb:RbTiOPO(4)/RbTiOPO(4) 波导实现了 1125nm 基频光束的高效 II 型相位匹配二次谐波产生。在不同波长下测量了外延层的折射率，并得到了色散曲线的Sellmeier 系数。相位匹配曲线表明，RbTiOPO(4)中的 Ba(2+)掺杂有助于将相位匹配范围增加到 900nm 左右。传播模式的实测有效折射率与理论计算吻合较好。
