Design of ultra-compact wavelength splitter based on lithium niobate nanowire optical waveguides
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This work has been supported by the National Natural Science Foundation of China (No.61040064)
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Abstract:
A wavelength splitter with ultra-compact and simple structure is proposed and analyzed by using both plane wave expansion (PWE) method and finite difference time domain (FDTD) method. The device is based on directional coupling between two parallel lithium niobate (LiNbO3, LN) nanowire optical waveguides. The wavelength splitter with a coupling region length of 5 m can separate 1.31μm and 1.55μm wavelengths for corresponding outputs with transmittance higher than 97%.
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Chen Ming, Liu Zi-chen. Design of ultra-compact wavelength splitter based on lithium niobate nanowire optical waveguides[J]. Optoelectronics Letters,2012,8(1):17-20