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01912nam a2200229Ia 4500 |
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10-1038-s41467-022-29590-0 |
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220425s2022 CNT 000 0 und d |
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|a 20411723 (ISSN)
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|a Narrowband microwave-photonic notch filters using Brillouin-based signal transduction in silicon
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|b Nature Research
|c 2022
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|z View Fulltext in Publisher
|u https://doi.org/10.1038/s41467-022-29590-0
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|a The growing demand for bandwidth makes photonic systems a leading candidate for future telecommunication and radar technologies. Integrated photonic systems offer ultra-wideband performance within a small footprint, which can naturally interface with fiber-optic networks for signal transmission. However, it remains challenging to realize narrowband (∼MHz) filters needed for high-performance communications systems using integrated photonics. In this paper, we demonstrate all-silicon microwave-photonic notch filters with 50× higher spectral resolution than previously realized in silicon photonics. This enhanced performance is achieved by utilizing optomechanical interactions to access long-lived phonons, greatly extending available coherence times in silicon. We use a multi-port Brillouin-based optomechanical system to demonstrate ultra-narrowband (2.7 MHz) notch filters with high rejection (57 dB) and frequency tunability over a wide spectral band (6 GHz) within a microwave-photonic link. We accomplish this with an all-silicon waveguide system, using CMOS-compatible fabrication techniques. © 2022, The Author(s).
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|a Dallo, C.M.
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|a Gehl, M.
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|a Gertler, S.
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|a Lentine, A.L.
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|a Otterstrom, N.T.
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|a Pomerene, A.T.
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|a Rakich, P.T.
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|a Starbuck, A.L.
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|a Trotter, D.C.
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| 773 |
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|t Nature Communications
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