Integrated fast optical switch fabricated by femtosecond laser micromachining

Petra Paiè; Matteo Calvarese; Francesco Ceccarelli; Federico Sala; Andrea Bassi; Roberto Osellame; Francesca Bragheri

doi:10.1117/12.2609037

4 March 2022 Integrated fast optical switch fabricated by femtosecond laser micromachining

Petra Paiè, Matteo Calvarese, Francesco Ceccarelli, Federico Sala, Andrea Bassi, Roberto Osellame, Francesca Bragheri

Proceedings Volume 11991, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXII; 1199105 (2022) https://doi.org/10.1117/12.2609037
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

Integrated optical switches and modulators allow performing reconfigurability in integrated circuits, resulting as fundamental components in different fields ranging from optical communications to sensing and metrology. Among different methods, the thermo-optic effect has been successfully used to fabricate optical modulators by femtosecond laser micromachining (FLM) in glass substrates, proving high stability, no losses dependance but long switching time. In this work, we present an integrated optical switch realized by FLM with a switching time of less than 1 ms: which is about 1 order of magnitude faster than the other devices present in literature. This result has been achieved by carefully optimizing the geometry and the position of resistors and trenches near the waveguides through simulation and experimental validation. In addition, by means of an optimization of the applied voltage signal, we have demonstrated a further significant temporal improvement, measuring a switching time of less than 100 μs.

Conference Presentation

Citation Download Citation

Petra Paiè, Matteo Calvarese, Francesco Ceccarelli, Federico Sala, Andrea Bassi, Roberto Osellame, and Francesca Bragheri "Integrated fast optical switch fabricated by femtosecond laser micromachining", Proc. SPIE 11991, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXII, 1199105 (4 March 2022); https://doi.org/10.1117/12.2609037

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