Si3N4 ring resonator-based microwave photonic notch filter with an ultrahigh peak rejection.
Opt Express
; 21(20): 23286-94, 2013 Oct 07.
Article
em En
| MEDLINE
| ID: mdl-24104242
ABSTRACT
We report a simple technique in microwave photonic (MWP) signal processing that allows the use of an optical filter with a shallow notch to exhibit a microwave notch filter with anomalously high rejection level. We implement this technique using a low-loss, tunable Si3N4 optical ring resonator as the optical filter, and achieved an MWP notch filter with an ultra-high peak rejection > 60 dB, a tunable high resolution bandwidth of 247-840 MHz, and notch frequency tuning of 2-8 GHz. To our knowledge, this is a record combined peak rejection and resolution for an integrated MWP filter.
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MEDLINE
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En
Ano de publicação:
2013
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Article