A Polarization-Insensitive 1310/1550-nm Demultiplexer Based on Sandwiched Multimode Interference Waveguides

Author

Shi, Yaocheng ; Anand, Srinivasan ; He, Sailing

Volume

19

Issue

22

fYear

2007

Firstpage

1789

Lastpage

1791

Abstract

A polarization-insensitive dual-wavelength demultiplexer based on sandwiched multimode interference waveguides is presented. Polarization-insensitive multimode waveguides are achieved first by choosing a suitable refractive index of the SiN middle region. The demultiplxing function is then realized by adjusting the width and length of the multimode region. Simulation results obtained from three-dimensional beam-propagation method show that the demultiplexer can work at 1310- and 1550-nm bands for both polarizations simultaneously with a low insertion loss and a broad bandwidth.

Keywords

demultiplexing equipment; light polarisation; optical communication equipment; optical fibre communication; optical losses; optical waveguides; refractive index; silicon compounds; SiN_x; demultiplxing function; dual-wavelength demultiplexer; insertion loss; multimode interference waveguides; polarization-insensitive demultiplexer; refractive index; sandwiched waveguides; three-dimensional beam-propagation; wavelength 1310 nm; wavelength 1550 nm; Arrayed waveguide gratings; Electromagnetic waveguides; Helium; Interference; Optical interferometry; Optical refraction; Optical variables control; Optical waveguides; Polarization; Wavelength division multiplexing; Demultiplexer; multimode interference (MMI); polarization independent; sandwiched waveguide;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.906836

Filename

4351992