基于铌酸锂光子线波长分裂器的研究

Wavelength splitter in LiNbO_3 photonic wire device

在集成光学领域,光波长分裂器对于光信号重新分配具有重要作用。设计了一种光波长分离器,这种器件可以把波长为1.31μm和1.55μm光的TE模式分裂开。该器件基于两个平行铌酸锂光子线的定向耦合器的工作原理,并且可以用有限元法设计和仿真。计算稳态场分布表明,波长为1.31μm与1.55μm的光波在空间上可以分离开。并且,1.31μm波的透射率可以达到91%,1.55μm波的透射率可以达到86%。该器件的尺寸只有26.2μm×10.1μm。

In the field of integrated optics, optical wavelength splitters is a key element in light signal redistribution. A optical wavelength splitter was presented for 1.31μm and 1.55μm wavelengths with TE mode. The device was based on the operating principle of a directional coupler in two parallel LiNbO3 photonic wire, and can be designed and simulated by finite element method. The calculated steady-state field distributions indicate that the wavelengths of 1.31μm and 1.55 μm light waves are spatially separated. In this device, transmittances at the 1.31 and 1.55μm wavelength are 91% and 86% respectively. The size of this device is only 26.2μm×10.1μm.