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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, the optical wavelength splitter plays an important role in optical signal redistribution. An optical wavelength splitter was designed that splits the TE mode at wavelengths of 1.31μm and 1.55μm. The device is based on the working principle of two directional couplers of parallel lithium niobate photonic wires and can be designed and simulated using finite element methods. Calculating the steady-state field distribution shows that light waves with wavelengths of 1.31μm and 1.55μm can be spatially separated. In addition, the transmittance of 1.31 μm wave can reach 91%, and the transmittance of 1.55 μm wave can reach 86%. The size of the device is only 26.2μm × 10.1μm.