Multifunctional photonic device

Resumo

In this thesis, it is presented a multifunctional photonic device: the MIDO (Multiple Inputs - Digital Output) device. The simulations have been run using the VPIphotonicsTM tool. Several studies have used it, validating the accuracy of the simulations provided by this software. Using the Transmission-Line Model of simulation included in the tool, it is shown the characterization of the two main components of the MIDO device: two Bistable Devices (BDs). These elements are composed each one by a Laser Diode (LD) designed as a Distributed Feedback (DFB) cavity with an active layer made of Multi Quantum Well (MQW). Both are forced to work in a regime that presents optical bistability, hence the name BD. The characterization of the MIDO device itself is shown as well. In addition to the characterization of the MIDO device in an ideal way, the development of the device fabricated in a Photonic Integrated Circuit (PIC) is shown, where the waveguides and the circulator that are also part of it are taken into account. Finally, three of the various applications of this multifunctional photonic device are shown: logic gates, wavelength detector, wavelength monitoring and biological signal feature extraction.