Abstract EN:

This work explores new technological solutions and device architectures for applications in optical Wavelength Division Multiplexing communication systems at three different levels of integration. The technological reference is the planar technology platform, standard in micro-electronics. At the lowest level of integration (order of cm), a technique for producing Bragg Gratings in Planar Lightwave Circuits is proposed and experimentally tested. At an intermediate level of integration (order of mm), a new class of optical filters based on micro-rings is introduced. Exploiting their potentialities, a Tunable Optical Add Drop Multiplexer is introduced and studied. At the highest level of integration (order of tens of mm), Self-Collimation phenomenon in Photonic Crystals is explored. Self-Collimation opens the way to new solutions for old problems (a waveguide crossing with total suppression of crosstalk is proposed) and to new devices (the reconfigurable waveguide is presented).