期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 21, 期 7, 页码 432-434出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2009.2013638
关键词
Integrated optics; optical waveguides; polarization splitter (PS); silicon-on-insulator (SOI); silicon photonic wire; two-mode interference (TMI); zero-gap directional coupler (ZGDC)
资金
- Korea Science and Engineering Foundation (KOSEF)
- Government of Korea (MOST) [(R01-2005-00011280-0)]
An ultrashort polarization splitter based on the zero-gap directional coupler is proposed and realized. Its interference section is 8.8 mu m long. It is also shown that the length of the interference section can be reduced to about 2.1 mu m. The crosstalk for both transverse-electric (TE) and transverse-magnetic (TM) polarizations is 16 dB at a wavelength of 1.55 mu m. The extinction ratios of TE and TM polarizations are 18.2 and 13.7 dB, respec_ tively. The device has 3-dB bandwidth of 43 mn in TE polarization and 50 nm in TM polarization with the center wavelength at 1.55 mu m.
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