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Box-like filter response of triple ring resonators with integrated SOA sections based on GaInAsP/InP

: Rabus, D.G.; Hamacher, M.; Heidrich, H.; Troppenz, U.


IEEE Electron Devices Society; IEEE Lasers and Electro-Optics Society:
IPRM, 14th Indium Phosphide and Related Materials Conference. Conference proceedings : May 12 - 16, 2002, Stockholm, Sweden
Piscataway: IEEE Operations Center, 2002
ISBN: 0-7803-7320-0
International Conference on Indium Phosphide and Related Materials (IPRM) <14, 2002, Stockholm>
Fraunhofer HHI ()
compensation; gallium arsenide; gallium compounds; iii-v semiconductors; indium compounds; integrated optics; optical communication equipment; optical directional couplers; optical losses; optical resonators; optical waveguide filters; resonator filters; semiconductor optical amplifiers; wavelength division multiplexing; triple coupled ring resonator; add/drop filters; fabrication; parallel configuration; serial configuration; integrated soas; loss compensation; additional device functionality; high order filters; passband characteristics; codirectional couplers; box-like filter response; wdm optical signal channel dropping filters; dwdm; dense wavelength division multiplexing; 25 GHz; 50 GHz; GaInAsP-InP

Triple coupled ring resonator (TRR) add/drop filters with parallel and serial configurations with integrated semiconductor optical amplifiers (SOAs) were designed and fabricated. The implemented SOAs within the resonators offer loss compensation plus additional device functionality. The high order filters have passband characteristics with sharper roll-off, flatter tops, and greater out-of-band rejection than previously demonstrated first order ring resonator filters. The free spectral range (FSR) of the devices is 25 GHz and 50 GHz. An on-off ratio of more than 20 dB was realized. The characteristic response of designed and manufactured triple ring resonator filters with codirectional couplers and integrated semiconductor optical amplifiers are presented.