A design for a high finesse parallel‐coupled microring resonator filter

Abstract

Interaction between the circulating waves in microrings and the connecting busbars provides two parallel‐coupled microrings with filter characteristics that feature a stopband with uniformly large rejection and high finesse. Performance degradation due to waveguide and coupler loss and facet discontinuities have also been computed and found to be moderate. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 38: 125–129, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10992

Analysis on transmission characteristics of nested ring resonators

“…Nowadays, various configurations of ring resonators have been proposed, such as single-ring resonators [1,2], series-coupled resonators [3], parallel-coupled resonators [4,5], and many other complicated structures [6,7]. Scale of rings in these resonators can be chosen from decimeters of fiber rings to microns of waveguide rings.…”

Experimental demonstration of a microdisk resonator filter/buffer utilizing two-mode interference

“…Bandpass filtering is achieved with a 3 dB bandwidth of 0.66 nm and an in-band ripple of less than 1 dB when the two resonances are detuned, while the filter can function as an optical buffer with an insertion loss of 5.85 dB and a predicted time delay of 15 ps when the two resonances are approximately aligned. Furthermore, the influence of resonance spacing is analyzed on the performance of this filter.Bandpass filters [1][2][3][4][5][6][7], all-pass filters [8], and notch filters [9,10] are universally required in optical communications for filtering and buffering applications. A box-like filter is an ideal bandpass filter with a flat-top passband and a sharp roll-off, accommodating large channel counts.…”

“…Bandpass filters [1][2][3][4][5][6][7], all-pass filters [8], and notch filters [9,10] are universally required in optical communications for filtering and buffering applications. A box-like filter is an ideal bandpass filter with a flat-top passband and a sharp roll-off, accommodating large channel counts.…”

“…A box-like filter is an ideal bandpass filter with a flat-top passband and a sharp roll-off, accommodating large channel counts. The box-like response has been achieved through intercavity interference in parallel- [1][2][3] or series- [4,5] coupled multiple resonators. Recent studies indicate that asymmetric bandpass filters [6,7] may offer higher channel packing density than the symmetric counterparts because of the pronounced out-of-band rejection level.…”

Ring-Resonator-Based Wavelength Filters

“…The trade-off between large FSR and low resonator loss can be circumvented by using more than one ring. When two rings of different radii are used, the Vernier effect [27][28][29] causes the total FSR to be a multiple of the respective single ring FSRs according to:…”