Title :
Polarization-independent filtering in a grating-assisted horizontal directional coupler
Author :
Francois, S. ; Fouchet, S. ; Bouadma, N. ; Ougazzaden, A. ; Carre, M. ; Herve-Gruyer, G. ; Filoche, M. ; Carenco, A.
Author_Institution :
Lab. de Bagneux, CNET, Bagneux, France
fDate :
7/1/1995 12:00:00 AM
Abstract :
We report here on the design and the first realization of a grating-assisted horizontal directional coupler filter exhibiting a highly reduced polarization sensitivity. The filter, which is based on InP-InGaAsP materials, is particularly suitable for integration in a 1.3/spl plusmn/1.3 μm duplexer. A polarization dependence below 1 dB has been measured for the separation of two 10 nm wide channels, respectively centered at 1.28 μm and 1.32 μm, for a rejection ratio of 10 dB.
Keywords :
III-V semiconductors; diffraction gratings; gallium arsenide; gallium compounds; indium compounds; optical communication equipment; optical design techniques; optical directional couplers; optical fibre filters; optical fibre polarisation; sensitivity; 1.28 mum; 1.3 mum; 1.32 mum; InP-InGaAsP; InP-InGaAsP materials; duplexer; grating-assisted horizontal directional coupler filter; highly reduced polarization sensitivity; integration; optical fibre filters; polarization dependence; polarization-independent filtering; rejection ratio; Anisotropic magnetoresistance; Band pass filters; Bandwidth; Directional couplers; Filtering; Gratings; Optical coupling; Optical waveguides; Polarization; Tellurium;
Journal_Title :
Photonics Technology Letters, IEEE
