title: Polarization diversity DPSK demodulator on the silicon-on-insulator platform with simple fabrication.
abstract: We demonstrate a novel polarization diversity differential phase-shift keying (DPSK) demodulator on the SOI platform, which is fabricated in a single lithography and etching step. The polarization diversity DPSK demodulator is based on a novel polarization splitter and rotator, which consists of a tapered waveguide followed by a 2 × 2 multimode interferometer. A lowest insertion loss of 0.5 dB with low polarization dependent loss of 1.6 dB and low polarization dependent extinction ratio smaller than 3 dB are measured for the polarization diversity circuit. Clear eye-diagrams and a finite power penalty of only 3 dB when the input state of polarization is scrambled are obtained for 40 Gbit/s non return-to-zero DPSK (NRZ-DPSK) demodulation.
authors.affiliation: Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark. yudin@fotonik.dtu.dk
authors.forename: Yunhong
authors.initials: Y
authors.lastname: Ding
authors.forename: Bo
authors.initials: B
authors.lastname: Huang
authors.forename: Haiyan
authors.initials: H
authors.lastname: Ou
authors.forename: Francesco
authors.initials: F
authors.lastname: Da Ros
authors.forename: Christophe
authors.initials: C
authors.lastname: Peucheret
mesh_terms: D004553:Electric Conductivity; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D012825:Silicon / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*
chemical_list: D012825:Silicon