Istituto di Fotonica e Nanotecnologie - Consiglio Nazionale delle Ricerche (IFN-CNR)
All Sessions by F. Ceccarelli
23 October
09:30
Low‐power reconfigurable photonic integrated circuits fabricated by femtosecond laser micromachining
09:30 - 09:50
Francesco Ceccarelli, Simone Atzeni, Francesco Pellegatta, Andrea Crespi and Roberto Osellame Femtosecond laser micromachining (FLM) allows rapid and cost-effective fabrication of 3D photonic integrated circuits employed today in diverse single-photon applications. However, when a thermal phase shifter is exploited to reconfigure an FLM device, its operation requires many hundreds of milliwatts. This issue strongly limits the scalability of these circuits. With this work, we present a new FLM fabrication process that takes advantage of thermal isolation microstructures (i.e. trenches and bridge waveguides) to demonstrate low propagation losses (0.29 dB/cm at 1550 nm), along with a power dissipation for a 2π phase shift down to 37 mW.
