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MMI-coupled ring resonators in GaInAsP-InP

: Rabus, D.G.; Hamacher, M.


IEEE Photonics Technology Letters 13 (2001), Nr.8, S.812-14
ISSN: 1041-1135
Fraunhofer HHI ()
gallium arsenide; gallium compounds; iii-v semiconductors; indium compounds; integrated optics; light interference; optical communication equipment; optical resonators; optical waveguide filters; optical waveguides; mmi-coupled ring resonators; GaInAsP-InP; characteristic response; race tracks; multimode interference coupler; contrast; finesse; free spectral ranges; single ring resonator; double ring resonator; throughput port; drop port; full-width at half-maximum; multiplexing; optical switching; optical communications equipment; 200 mum; 400 mum

The characteristic response of single and double GaInAsP-InP ring resonators in the form of race tracks with a radius of 100 and 200 mu m are presented. The used multimode interference (MMI) coupler is as short as 150 mu m. A contrast of 13 dB, a finesse of six, and free spectral ranges of 50 and 100 GHz have been achieved for the single ring resonator. The double ring resonator has a full-width at half-maximum (FWHM) of 0.25 nm for the throughput port and 0.4 nm for the drop port.