Multimode interference (MMI)-based optical splitter is designed and experimentally demonstrated on silicon on insulator for on-chip optical interconnect. In order to better understand the damage phenomenon and failure mechanism of planar lightwave circuit (PLC) optical splitters under force cycling, this paper established an online test experimental platform to study their optical and mechanical performance response under the action of force. An optical splitter is a device used in fiber optic communication systems to divide a single optical signal into multiple output signals, enabling the distribution of light from one input fiber to several output fibers. The device shows low excess loss of 0.