Photonics Research Group

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Research Interests

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Group IV Photonics

A large number of photonic devices in silicon-based technology are investigated, including linear and non linear devices (all-optical logic gates, stimulated Raman scattering, solitons, four wave mixing, ..), grating-assisted couplers between small waveguides and optical fibers, microcavity resonators, silicon modulators. Technologies under investigation include Silicon on Insulator (SOI), Si-Ge, SiGeSn compounds and other group IV material systems, as well as silicon-organic hybrid (SOH).

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Coupling device between an optical fibre and a submicrometer silicon waveguide (international patent)

Photonic Sensors

A very important topic for the research group is that of guided-wave optical sensors. Innovative architectures for environmental, space and health applications are investigated, modeled, designed and simulated, including measurements of electric fields, angular velocity in gyroscopes, chemical and biochemical analytes, biomedical applications. Apart from silicon, other materials are considered, including polymers and III/V semiconductors.

 

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Example of dual cavity E-field photonic integrated sensor

Semiconductor Lasers

Modeling of semiconductor lasers are carried out and simulations are compared with experiments. Multi quantum well ring lasers, S-shaped ring lasers, Raman-based optical sources and vertical cavity surface emitting lasers are the most significant examples in this large field.

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Structure of simulated vertical cavity surface emitting laser (VCSEL)

Fiber Optic Devices for Telecommunications Systems

Fiber optic devices for telecommunications systems are investigated and simulated for improving their performance. Semiconductor optical amplifiers, reconfigurable add-drop multiplexers and optical filters (e.g., for wavelength interrogation) are some significant examples.

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Eye diagram for a telecommunications system optical link

Contacts:

Prof. Vittorio M. N. Passaro

Dipartimento di Ingegneria Elettrica e dell'Informazione
Politecnico di Bari
Via Edoardo Orabona n.4, 70125 BARI, Italy
Phone  +39 0805963850, FAX +39 080 5963410
E-mail: vittorio.passaro@poliba.it
URL: http://dee.poliba.it/photonicsgroup

Last update: September 2016 - Dipartimento di Ingegneria Elettrica e dell'Informazione - Politecnico di Bari