Integrable microwave filter based on a photonic crystal delay line.

Juan Sancho, Jerome Bourderionnet, Juan Lloret, Sylvain Combrié, Ivana Gasulla, Stephane Xavier, Salvador Sales, Pierre Colman, Gaelle Lehoucq, Daniel Dolfi, José Capmany, Alfredo De Rossi

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The availability of a tunable delay line with a chip-size footprint is a crucial step towards the full implementation of integrated microwave photonic signal processors. Achieving a large and tunable group delay on a millimetre-sized chip is not trivial. Slow light concepts are an appropriate solution, if propagation losses are kept acceptable. Here we use a low-loss 1.5 mm-long photonic crystal waveguide to demonstrate both notch and band-pass microwave filters that can be tuned over the 0-50-GHz spectral band. The waveguide is capable of generating a controllable delay with limited signal attenuation (total insertion loss below 10 dB when the delay is below 70 ps) and degradation. Owing to the very small footprint of the delay line, a fully integrated device is feasible, also featuring more complex and elaborate filter functions.
Original languageEnglish
JournalNature Communications
Volume3
Pages (from-to)1075
ISSN2041-1723
DOIs
Publication statusPublished - 2012
Externally publishedYes

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