Ultrashort Polarization Splitter Using Two-Mode Interference in Silicon Photonic Wires

作者：Yang Byung Ki^*; Shin Sang Yung; Zhang Daming

来源：IEEE Photonics Technology Letters, 2009, 21(7): 432-434.

DOI：10.1109/LPT.2009.2013638

• Integrated optics
• optical waveguides
• polarization splitter (PS)
• silicon-on-insulator (SOI)
• silicon photonic wire
• two-mode interference (TMI)
• zero-gap directional coupler (ZGDC)

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.

• 出版日期2009-4-1
• 单位吉林大学