title: GHz-bandwidth optical filters based on high-order silicon ring resonators.
abstract: Previously demonstrated high-order silicon ring filters typically have bandwidths larger than 100 GHz. Here we demonstrate 1-2 GHz-bandwidth filters with very high extinction ratios (~50 dB). The silicon waveguides employed to construct these filters have propagation losses of ~0.5 dB/cm. Each ring of a filter is thermally controlled by metal heaters situated on the top of the ring. With a power dissipation of ~72 mW, the ring resonance can be tuned by one free spectral range, resulting in wavelength-tunable optical filters. Both second-order and fifth-order ring resonators are presented, which can find ready application in microwave/radio frequency signal processing.
authors.affiliation: Kotura Inc., 2630 Corporate Place, Monterey Park, CA 91754, USA. pdong@kotura.com
authors.forename: Po
authors.initials: P
authors.lastname: Dong
authors.forename: Ning-Ning
authors.initials: NN
authors.lastname: Feng
authors.forename: Dazeng
authors.initials: D
authors.lastname: Feng
authors.forename: Wei
authors.initials: W
authors.lastname: Qian
authors.forename: Hong
authors.initials: H
authors.lastname: Liang
authors.forename: Daniel C
authors.initials: DC
authors.lastname: Lee
authors.forename: B J
authors.initials: BJ
authors.lastname: Luff
authors.forename: T
authors.initials: T
authors.lastname: Banwell
authors.forename: A
authors.initials: A
authors.lastname: Agarwal
authors.forename: P
authors.initials: P
authors.lastname: Toliver
authors.forename: R
authors.initials: R
authors.lastname: Menendez
authors.forename: T K
authors.initials: TK
authors.lastname: Woodward
authors.forename: Mehdi
authors.initials: M
authors.lastname: Asghari