Wavelength Division Demultiplexing and Cross-Talk Assessment of a Photonic Crystal Filter

Kevin Lenglé (1) , Mathilde Gay (1) , Laurent Bramerie (1) , Jean-Claude Simon (1) , Sylvain Combrié (2) , Gaëlle Lehoucq (3) , Alfredo de Rossi (2) , Stefania Malaguti (4) , Gaetano Bellanca (4) , Stefano Trillo (5)

1 FOTON - Fonctions Optiques pour les Technologies de l'informatiON
2 Laboratoire Albert Fert (ex-UMPhy Unité mixte de physique CNRS/Thales)
3 Thales Research and Technology [Palaiseau]
4 Engineering Department [Ferrara]
5 Department of Engineering

We report on the design, fabrication and characterization of a filter for demultiplexing in the wavelength division domain realized with a H0 cavity on a III-V photonic crystal (PhC) membrane. This device is single mode, the total insertion losses are about 10.5 dB, the drop efficiency is close to 40 % and the channel isolation can exceed 20 dB at 500 GHz. 28 Gbit/s NRZ wavelength demultiplexing shows less than 0.5 dB penalties. Cross talk measurements demonstrate less than 1 dB penalty when adjacent channels are spaced as closely as 235 GHz, demonstrating the good compatibility of this filter with LAN-WDM systems. Finally, 56 Gbit/s NRZ-DQPSK signal filtering is assessed revealing negligible penalty (< 0.5 dB).

Mots clés: Optical filters; optical signal processing; photonic crystal waveguide; photonic integrated circuits; wavelength division demultiplexing

Domaines: Optique / photonique

Kevin Lenglé, Mathilde Gay, Laurent Bramerie, Jean-Claude Simon, Sylvain Combrié, et al.. Wavelength Division Demultiplexing and Cross-Talk Assessment of a Photonic Crystal Filter. IEEE Photonics Technology Letters, 2012, 24 (23), pp.2109-2111. ⟨10.1109/LPT.2012.2220961⟩. ⟨hal-00817126⟩