Pietro Bernasconi

All-optical wavelength converter based on a pulse reformatting optical filter

We demonstrate a novel all-optical wavelength converter based on a pulse reformatting optical filter. A realization within a MEMS switch allows simultaneous 40 Gb/s wavelength conversion, switching and format conversion. The device outperforms current schemes with respect to input-power requirements, input-power dynamic range and signal quality.

Self-mode-locked single-section Fabry-Perot semiconductor lasers at 1.56 μm

The mode-locking mechanism of a single-section multi-spatial-mode Fabry-Perot semiconductor laser is analyzed by the additive pulse mode-locking (APM) master equation model. Critical parameters of the equivalent saturable absorber as well as the self-phase modulation are estimated. The mode-locking operation regime in terms of pulse chirp and output power is predicted by the APM model and the prediction is shown to be in good agreement with the experimental results of a 40 GHz, 6.7 ps pulse width mode-locked operation at 1.56 microm.

A Simulator for Integrated Optoelectronic Devices

A novel simulator useful to design and analyze the functionality of advanced integrated optical chips is presented and demonstrated through an example of a wavelength converter operating at 40 Gb/s. Written in a modular graphical programming language, the simulator is intuitive, fast, flexible and powerful. It represents an attractive alternative to more traditional approaches

Monolithically Integrated Differential Mach-Zehnder Filter for 40 Gb/s Wavelength Conversion in High-Confinement Butt-Joint SOAs

An InP-InPGaAs material platform relying upon active material regrowth is used to fabricate a monolithic wavelength converter. Error-free conversion is demonstrated for RZ signals at 40 Gb/s in a Mach-Zehnder filter with differential signal input.

Slot synchronization in wavelength-routed star networks based on broadcasting frames from a multifrequency laser

We propose and demonstrate a synchronization technique for wavelength-routed star networks. A multifrequency tunable laser in a master node performs broadcasting function to synchronize the network nodes.