Title :
A High Extinction Ratio Polarization Beam Splitter With MMI Couplers on InP Substrate
Author :
Liangshun Han ; Song Liang ; Hongliang Zhu ; Can Zhang ; Wei Wang
Author_Institution :
Key Lab. of Semicond. Mater. Sci., Inst. of Semicond., Beijing, China
Abstract :
A high extinction ratio (ER) polarization beam splitter with three different multimode interference couplers on InP substrate was designed by a three-dimensional beam propagation method. Simulations show that the polarization ER (PER) is over 34 dB and internal loss is <;0.8 dB for both TE and TM polarizations. The PER imbalance between the two polarization states has been reduced to 22 dB. The total length of the device is <;950 μm. The effects of the width of the input port on the performance of the device are discussed in detail.
Keywords :
light polarisation; light propagation; optical beam splitters; optical couplers; optical design techniques; optical losses; InP; InP substrate; TE polarization; TM polarization; high extinction ratio polarization beam splitter; input port width; internal loss; multimode interference couplers; three-dimensional beam propagation method; Couplers; Extinction ratio; Fabrication; Indium phosphide; Interference; Laser beams; Optical waveguides; High extinction ratio (ER); multimode interference (MMI); polarization beam splitter (PBS);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2392383
