Title :
Pulse response of multimode interference devices
Author :
Chang, Yin-Jung ; Gaylord, Thomas K. ; Chang, Gee-Kung
Author_Institution :
Comput. Eng. & Packaging Res. Center, Georgia Inst. of Technol., Atlanta, GA
fDate :
3/1/2006 12:00:00 AM
Abstract :
Multimode interference (MMI) devices operating at high data rates are important in optical interconnects and optical networks. Their 1timesN splitting provides a fundamental functionality in these and other applications. To determine the speed limitations of MMI devices, the ultrashort pulse response of these devices is modeled. For example, for 50-fs Gaussian input pulses into a 1 times 16 splitter, the output pulses are severely degraded in coupling efficiency (48%) and completely broken up in time primarily due to intermodal and intramodal (waveguide) dispersion. Material dispersion is found to play only a minor role in the pulse response of MMI devices. However, for 1-ps input pulses into the same 1 times 16 splitter, the output pulses are only moderately degraded in coupling efficiency (86%) and only slightly degraded in shape
Keywords :
high-speed optical techniques; integrated optics; light interference; optical dispersion; 1 ps; 48 percent; 50 fs; 86 percent; coupling efficiency; intermodal dispersion; intramodal dispersion; multimode interference devices; optical interconnects; optical networks; ultrashort pulse response; Bandwidth; Couplers; Degradation; Interference; Optical fiber dispersion; Optical fiber networks; Optical filters; Optical interconnections; Optical pulses; Optical waveguides; Integrated optics; multimode interference (MMI); optical splitter; optical waveguide; ultrashort-pulse response;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.863278
