Title :
Parallel-cascaded semiconductor microring resonators for high-order and wide-FSR filters
Author :
Grover, R. ; Van, V. ; Ibrahim, T.A. ; Absil, P.P. ; Calhoun, L.C. ; Johnson, F.G. ; Hryniewicz, J.V. ; Ho, P.-T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Maryland Univ., College Park, MD, USA
fDate :
5/1/2002 12:00:00 AM
Abstract :
We demonstrate an optical channel dropping filter (OCDF) using three parallel-cascaded vertically coupled microrings with improved rolloff, bandpass flattening, and wide free spectral range (FSR) compared to a single-ring OCDF using single-mode tightly confined waveguides in both GaAs-AlGaAs and GaInAsP-InP. We achieve FSRs of 30 nm for GaAs-AlGaAs and 40 nm for GaInAsP-InP devices, which are three and four times greater, respectively, than those for single rings. The rolloff is 2.8 times faster than that for a single ring.
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; indium compounds; integrated optics; micro-optics; micromechanical resonators; optical communication equipment; optical waveguide filters; resonator filters; wavelength division multiplexing; GaAs-AlGaAs; GaInAsP-InP; Vernier effect; WDM; bandpass flattening; high-order filters; large-scale optical integrated devices; microresonators; optical channel dropping filter; parallel-cascaded semiconductor microring resonators; parallel-cascaded single-mode microring resonator channel dropping filters; parallel-cascaded vertically coupled microrings; rolloff; single-mode tightly confined waveguides; wide free spectral range; wide-FSR filters; Fabrication; Indium phosphide; Microwave filters; Microwave technology; Optical coupling; Optical filters; Optical resonators; Optical waveguides; Resonator filters; Transfer functions;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2002.1007947
