7 May 2012 Design and analysis of polarization splitter based on a horizontal slotted waveguide
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Abstract
We theoretically analyze the effective indices of a horizontal slotted waveguide on SOI platform. Based on the analysis, both polarization independent and strongly birefringent waveguides can be constructed in our proposed waveguide geometry. Utilizing the strongly birefringent waveguide, an ultra-compact polarization splitter based on a directional coupler (DC) was proposed and subsequently optimized by 3D-beam propagation method. The simulation results suggest that the coupling length of the DC could be less than 18 μm, and the maximum polarization crosstalk less than −47 and −37  dB for the cross and bar ports, respectively. Around the 1550 nm operating wavelength, a bandwidth of 30 nm is obtained for the crosstalk less than −20  dB. Finally, the tolerance of the splitter is discussed.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yonghao Fei, Shaowu Chen, Libin Zhang, Tongtong Cao, "Design and analysis of polarization splitter based on a horizontal slotted waveguide," Optical Engineering 51(5), 054601 (7 May 2012). https://doi.org/10.1117/1.OE.51.5.054601 . Submission:
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