论文信息 - Experimental demonstration of an ultracompact polarization beamsplitter based on a multimode interference coupler with internal photonic crystals

Experimental demonstration of an ultracompact polarization beamsplitter based on a multimode interference coupler with internal photonic crystals

The fabrication and characterization of a compact InP-based polarization beamsplitter (PBS) is presented. A multimode interference (MMI) coupler with an internal air hole photonic crystal (PhC) section is utilized to separate the two polarizations. The PhC structure in the middle of the MMI is polarization dependent, so that one polarization is reflected and the other one is transmitted; both are collected by the respective output ports of the MMI coupler. The obtained experimental results show that the PBS as short as ~400 µm has an extinction ratio as large as 15 dB.

[1] A. Miliou,et al. A 1.3 mu m directional coupler polarization splitter by ion exchange , 1993 .

[2] Luigi Moretti,et al. A polarizing beam splitter using negative refraction of photonic crystals. , 2005, Optics express.

[3] Jingbo Cai,et al. Ultracompact high-efficiency polarizing beam splitter with a hybrid photonic crystal and conventional waveguide structure. , 2003, Optics letters.

[4] H.K. Tsang,et al. Integrated polarization beam splitter in high index contrast silicon-on-insulator waveguides , 2005, IEEE Photonics Technology Letters.

[5] Sailing He,et al. Proposal for an Ultracompact Polarization-Beam Splitter Based on a Photonic-Crystal-Assisted Multimode Interference Coupler , 2007, IEEE Photonics Technology Letters.

[6] V Zabelin,et al. Self-collimating photonic crystal polarization beam splitter. , 2007, Optics letters.

[7] Chao-Yi Tai,et al. Design and Analysis of an Ultra-Compact and Ultra-Wideband Polarization Beam Splitter Based on Coupled Plasmonic Waveguide Arrays , 2007, IEEE Photonics Technology Letters.