Integrated Optics

Design and analysis of polarization splitter based on a horizontal slotted waveguide

[+] Author Affiliations
Yonghao Fei

Institute of Semiconductors, State Key Laboratory on Integrated Optoelectronics, Chinese Academy of Sciences, Beijing 100083, China

Shaowu Chen

Institute of Semiconductors, State Key Laboratory on Integrated Optoelectronics, Chinese Academy of Sciences, Beijing 100083, China

Libin Zhang

Institute of Semiconductors, State Key Laboratory on Integrated Optoelectronics, Chinese Academy of Sciences, Beijing 100083, China

Tongtong Cao

Institute of Semiconductors, State Key Laboratory on Integrated Optoelectronics, Chinese Academy of Sciences, Beijing 100083, China

Opt. Eng. 51(5), 054601 (May 07, 2012). doi:10.1117/1.OE.51.5.054601
History: Received December 30, 2011; Revised March 13, 2012; Accepted March 14, 2012
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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 37dB 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 20dB. Finally, the tolerance of the splitter is discussed.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Yonghao Fei ; Shaowu Chen ; Libin Zhang and Tongtong Cao
"Design and analysis of polarization splitter based on a horizontal slotted waveguide", Opt. Eng. 51(5), 054601 (May 07, 2012). ; http://dx.doi.org/10.1117/1.OE.51.5.054601


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