Title :
Mode evolution type polarization splitter on InGaAsP/InP
Author :
van der Tol, J.J.G.M. ; Pedersen, J.W. ; Metaal, E.G. ; Oei, Y.S. ; van Brug, H. ; Moerman, I.
Author_Institution :
PTT Res. Neher Labs., Leidschendam, Netherlands
Abstract :
A new type of mode-evolution polarization-splitter based on InGaAsP/lnP has been designed and realized. The component uses the large waveguide birefringence of the first-order TE and TM modes in a ridge waveguide made in a heterostructure, In the input section an asymmetric Y-junction acts as a mode converter in order to inject first-order TE- and TM-modes in a polarization-splitting section, which consists of a Y-junction formed by a bimodal and a monomodal waveguide. In the output section a third Y-junction is connected to the bimodal waveguide to couple the first-order mode to a monomodal output waveguide. Components that are 6-mm long and show polarization splitting at a wavelength of 1.55 mu m have been realized. The best splitting ratios are close to -20 dB, which is in agreement with BPM simulations. Excess losses are below 1 dB.<>
Keywords :
III-V semiconductors; gallium arsenide; gallium compounds; indium compounds; integrated optics; optical polarisers; optical waveguides; 1 dB; 1.55 mum; 6 mm; BPM simulations; InGaAsP-InP; InGaAsP/InP; asymmetric Y-junction; bimodal waveguide; excess losses; first-order TE modes; first-order TM modes; heterostructure; input section; integrated optics; large waveguide birefringence; mode converter; mode evolution type polarization splitter; monomodal output waveguide; monomodal waveguide; polarization splitting; ridge waveguide; splitting ratios; third Y-junction; Birefringence; Electromagnetic wave polarization; Fabrication; Indium phosphide; Optical devices; Optical polarization; Optical receivers; Optical waveguides; Semiconductor waveguides; Waveguide components;
Journal_Title :
Photonics Technology Letters, IEEE
