124 research outputs found
Silicon germanium platform enabling mid-infrared to near-infrared conversion for telecom and sensing applications
No full textThis paper presents the potential of silicon germanium waveguides in the nonlinear conversion of light from mid-infrared wavelengths to the telecom band utilizing four-wave mixing. Design aspects and first characterization results of fabricated devices are presented
Linear and nonlinear properties of SiGe waveguides at telecommunication wavelengths
No full textWe report the characterization of the optical properties of Silicon-Germanium (SiGe) waveguides. The evolution of these properties is presented as a function of the Ge concentration and the waveguide width
FWM-based wavelength conversion in a silicon germanium waveguide
No full textWe demonstrate four-wave mixing based wavelength conversion of 40 Gbaud DPSK and QPSK signals in a 2.5-cm long silicon germanium waveguide with a nonlinearity coefficient of 25.8/W/m
PSA-based phase regeneration of dpsk signals in a silicon germanium waveguide
No full textWe demonstrate a polarization-assisted PSA-based phase regenerator in a passive low-birefringence SiGe waveguide at low CW pump power. A PSER of 28.6 dB enables a six-fold reduction in phase-error and BER improvement of approximately 2 dB in the regenerated signal
Polarization insensitive wavelength conversion of 40 Gb/s DPSK signals in a silicon germanium waveguide
No full textWe demonstrate polarization insensitive FWM-based wavelength conversion of 40-Gb/s DPSK signals in a SiGe waveguide, with 0.42-dB polarization-dependent loss. A 1.5-dB power penalty was measured at a BER of 10-9
Record phase sensitive extinction ratio in a silicon germanium waveguide
No full textA binary step-like phase response and phase-sensitive extinction ratio in excess of 28dB under CW pump operation was demonstrated in a 20mm-long low birefringence SiGe waveguide, using a polarization-assisted phase sensitive amplifier scheme
Advanced nonlinear signal processing in silicon-based waveguides
No full textThis talk presents recent progress in optical signal processing based on compact waveguides fabricated mainly using silicon germanium alloys. Applications include supercontinuum generation, wavelength conversion and signal regeneration
Advanced nonlinear signal processing in silicon-based waveguides
No full textThis talk presents recent progress in optical signal processing based on compact waveguides fabricated mainly using silicon germanium alloys. Applications include supercontinuum generation, wavelength conversion and signal regeneration
High speed optical transmission at 2 μm in subwavelength waveguides made of various materials
No full textWe report the transmission of a 10 Gbps telecommunication signal at 2 μm in waveguides made of three different materials: Si, SiGe and TiO2. Bit error rates below 10−9 can be achieved after transmission in the devices with subwavelength dimensions.</p
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