Title :
Optical bandwidth and fabrication tolerances of multimode interference couplers
Author :
Besse, Pierre A. ; Bachmann, Maurus ; Melchior, H. ; Soldano, L.B. ; Smit, M.K.
Author_Institution :
Inst. of Quantum Electronics, Eidgenossische Tech. Hochschule, Zurich, Switzerland
fDate :
6/1/1994 12:00:00 AM
Abstract :
Analytical expressions are derived which relate the optical bandwidth and the fabrication tolerances of multimode interference (MMI) couplers to their most important design parameters. These expressions compare adequately with mode analysis simulations. For strong guided structures, the optical bandwidth is shown to he inversely proportional to the number of input and output ports N and to the length of the device. The fabrication tolerances are independent of N and proportional to the output channel separation D. Measurements on MMI couplers in InP/InGaAsP corroborate the theoretical predictions
Keywords :
III-V semiconductors; gallium arsenide; gallium compounds; indium compounds; integrated optics; light interference; optical communication equipment; optical couplers; optical waveguides; optical workshop techniques; simulation; InP-InGaAsP; InP/InGaAsP; analytical expressions; design parameters; fabrication tolerances; input ports; length; mode analysis simulations; multimode interference couplers; optical bandwidth; output channel separation; output ports; strong guided structures; theoretical predictions; Bandwidth; Couplers; Integrated optics; Interference; Optical device fabrication; Optical devices; Optical receivers; Optical refraction; Optical variables control; Optical waveguides;
Journal_Title :
Lightwave Technology, Journal of
