Research on integrated optic frequency converter with wavelength filter

我们提出了一种带有波导波长滤波器的新型集成光学可调谐波长转换器。该器件基本上由二次谐波部分和滤波器部分组成。在二次谐波部分，两个周期域反转区域在波导中心轴上沿传播方向发生π相移。在该区域中，从基波波长的最低阶对称模式产生具有反对称高阶模式的二次谐波光。在滤波器部分，由于非对称的模式分裂行为，基波和高阶模式被分裂。 Y分支波导。该滤波器部分还充当模式转换器，以便在传播二次谐波的Y分支高阶模式后将其转换为基波模式。我们对所提出的装置进行了分析，并成功制作了二次谐波部分。

We propose a new type of integrated optical tunable wavelength converter with waveguide wavelength filter.The device is basically consist of second harmonic section and filter section.In secondo harmonic section, two periodic domain inverted areas are pi phase-shifted at the center axis of waveguide along the propagating direction In this region second harmonic light with antisynmnetric higher order mode is generated from the lowest order symmetric mode at fundamental wavelength.In filter section fundamental and higher order modes are splitted because of the mode splitting behavior of non-symmmetric Y branching waveguides.This filter section also works as a mode converter so that after propagating the Y branching higher order mode of second harmonic wave is converted to fundamental mode.We analyzed the proposed devices and made the second harmonic section successfully.