Pulse response of multimode interference devices

作者：Chang YJ^*; Gaylord TK; Chang GK

来源：Journal of Lightwave Technology, 2006, 24(3): 1462-1469.

DOI：10.1109/JLT.2005.863278

• integrated optics
• multimode interference (MMI)
• optical splitter
• optical waveguide
• ultrashort-pulse response

Multimode interference (MMI) devices operating at high data rates are important in optical interconnects and optical networks. Their 1 x N 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 x 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 x 16 splitter, the output pulses are only moderately degraded in coupling efficiency (86%) and only slightly degraded in shape.

• 出版日期2006-3