Ultra-Broadband Silicon-Wire Polarization Beam Combiner/Splitter Based on a Wavelength Insensitive Coupler With a Point-Symmetrical Configuration

Takui Uematsu, Tetsuya Kitayama, Yuhei Ishizaka, Kunimasa Saitoh
2014 IEEE Photonics Journal  
An ultrabroadband silicon wire polarization beam combiner/splitter (PBCS) based on a wavelength-insensitive coupler is proposed. The proposed PBCS consists of three identical directional couplers and two identical delay lines. We design the PBCS using the 3-D finite element method. Numerical simulations show that the proposed PBCS can achieve the transmittance of more than 90% over a wide wavelength range from 1450 to 1650 nm for both TE and TM polarized modes.
doi:10.1109/jphot.2014.2302808 fatcat:5ekieorhv5dvvdvfkmm5cy7jma