Reconfigurable add-drop filter based on an antisymmetric multimode photonic crystal nanobeam cavity in a silicon waveguide

We have designed and demonstrated a reconfigurable channel add-drop filter (ADF) based on an antisymmetric multimode photonic crystal nanobeam cavity (AM-PCNC) in a silicon waveguide. The proposed AM-PCNC can realize channel add-drop filtering by selectively filtering and reflecting the fundamental...

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Veröffentlicht in:Optics express 2022-05, Vol.30 (10), p.17332-17339
Hauptverfasser: Dong, Penghui, Liu, Chaoyue, Zhang, Long, Dai, Daoxin, Shi, Yaocheng
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Sprache:eng
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Zusammenfassung:We have designed and demonstrated a reconfigurable channel add-drop filter (ADF) based on an antisymmetric multimode photonic crystal nanobeam cavity (AM-PCNC) in a silicon waveguide. The proposed AM-PCNC can realize channel add-drop filtering by selectively filtering and reflecting the fundamental mode (TE 0 ) and 1st-order mode (TE 1 ) in the multimode waveguide. A high-performance add-drop filter has been demonstrated with a high extinction ratio of 28.2 dB and an insertion loss of 0.18 dB. Meanwhile, the reconfigurable add-dropping has been realized by heating the nanobeam cavity to tune the filtering wavelength. A tuning efficiency of 0.464 nm/mW was measured. The rising and falling time are ∼6.5 µs and ∼0.6 µs, respectively, which are at microsecond time scale. The footprint of the involved nanobeam cavity is only 16.5 µm 2 . The device can potentially provide an integrated component for optical switch array, routers, and wavelength-division multiplexing in the optical networks.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.457883