Title :
Analysis of Polarization Splitters Composed of Multilayer Thin-Film Waveguides Using the Beam-Propagation Method Based on Yee´s Mesh
Author :
Yamauchi, Junji ; Kamei, Yuji ; Murase, Koichi ; Nakano, Hisamatsu
Author_Institution :
Hosei Univ., Tokyo
Abstract :
Multilayer thin-film waveguides (MTFWs) are analyzed using the beam-propagation method based on Yee´s mesh. The birefringence properties of the MTFW are demonstrated by the eigenmode analysis based on the imaginary-distance procedure. Taking advantage of the birefringence, a polarization splitter composed of two parallel MTFWs is proposed. Calculation shows that a short device length of 270 mum is obtainable with crosstalks of -33.5 dB for the quasi-transverse-electric mode and -20.7 dB for the quasi-transverse-magnetic mode. A crossing-type polarization splitter is also developed, and the device length is further reduced to 120 mum.
Keywords :
birefringence; eigenvalues and eigenfunctions; light polarisation; optical beam splitters; optical multilayers; optical polarisers; optical waveguides; thin film devices; Yee´s mesh; beam-propagation method; birefringence properties; crosstalks; eigenmode analysis; imaginary-distance procedure; multilayer thin-film waveguides; polarization splitters analysis; quasitransverse-electric mode; quasitransverse-magnetic mode; size 270 mum; Birefringence; Crosstalk; Educational institutions; Image analysis; Magnetic analysis; Nonhomogeneous media; Polarization; Refractive index; Tellurium; Transistors; Beam-propagation method; Yee´s mesh; eigenmode analysis; multilayer thin-film waveguide (MTFW); polarization splitter;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2007.901376
