Nanophotonic polarization diversity demultiplexer chip

van Laere Frederick (1) , Tiziana Stomeo (2) , Cyril Cambournac (3) , Melanie Ayre (3) , Romain Brenot (4) , Henri Benisty (3) , Günther Roelkens (1) , Thomas F. Krauss (2) , Dries van Thourhout (1) , R. Baets (1)

1 INTEC - Department of Information Technology
2 SUPA School of Physics and Astronomy [University of St Andrews]
3 Laboratoire Charles Fabry de l'Institut d'Optique / Naphel
4 III-V Lab - Alcatel-Thalès III-V lab

We demonstrate a very compact multifunctional photonic-crystal demultiplexer on high index contrast InP-membrane for coarse WDM applications. Polarization diversity is implemented using 2D-grating couplers. The performance of the device is evaluated using integrated p-i-n photodetectors. Polarization diversity from fiber to detector--without intermediate functional device--results in a minimal polarization dependent loss (PDL) of 0.2 dB. This value increases to 1.1 dB when including the photonic-crystal demultiplexer.

Keywords: CWDM; demultiplexer; integrated optics; photonic crystal; p-i-n photodetectors

Domains: Optics [physics.optics]

van Laere Frederick, Tiziana Stomeo, Cyril Cambournac, Melanie Ayre, Romain Brenot, et al.. Nanophotonic polarization diversity demultiplexer chip. Journal of Lightwave Technology, 2009, 27 (4), pp.417. ⟨hal-00567023⟩