Title :
TE/TM-mode pass polarizers and splitter based on an asymmetric twin waveguide and resonant coupling
Author :
Wieczorek, Andreas ; Roycroft, Brendan ; Peters, Frank H. ; Corbett, Brian
Author_Institution :
Tyndall Nat. Inst., Univ. Coll. Cork, Cork, Ireland
Abstract :
A new passive TE/TM-mode polarization filter for an InGaAsP/InP material system based on an asymmetric twin waveguide (ATG) and resonant coupling is investigated. Linear taper sections with different taper angles are introduced to couple between the two vertically separated waveguides. At a wavelength of 1.55 μm extinction ratios (ER) of 20 dB for the TE- and more than 10 dB for the TM-mode are reported for devices shorter than 400 μm. Furthermore we show, this concept can be expanded to a polarization splitter.
Keywords :
III-V semiconductors; gallium arsenide; gallium compounds; indium compounds; light polarisation; optical beam splitters; optical couplers; optical filters; optical waveguides; InGaAsP-InP; TE/TM-mode pass polarizers; asymmetric twin waveguide; linear taper sections; passive TE/TM-mode polarization filter; polarization splitter; resonant coupling; wavelength 1.55 mum; Couplings; Educational institutions; Erbium; Indium phosphide; Optical polarization; Optical waveguides; Propagation constant;
Conference_Titel :
Numerical Simulation of Optoelectronic Devices (NUSOD), 2011 11th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-61284-876-1
Electronic_ISBN :
2158-3234
DOI :
10.1109/NUSOD.2011.6041196
