摘要： Mode Division Multiplexing (MDM) technique using higher order Orbital Angular Momentum (OAM) carrying modes through a channelized bandwidth provides enhanced capacity communication systems. Furthermore, encrypted channels via OAM based high-dimensional Quantum Key Distribution (QKD) improve the transmission rate and security. In such applications, mode-selective manipulation of the spatially distributed (here, OAM) modes is a significant function to implement MDM and QKD networks. This paper proposes a novel versatile-designed chip which is configured in a Ycut Periodically Poled Lithium Niobate (PPLN) photonic wire. This integrated optical device acts as spatial mode converter for data modulated on higher order OAM= ±2ˉh modes. The conversion is based on enhanced electro-optic (EO) Kerr effect via phase-mismatched cascaded polarization coupling interactions of decomposed guided modes in two successive PPLN sections. The high-purity (91%) and low-voltage (<14.6 V) of the proposed device enable its operation in compatible with applicable commercial modulators in OAM-based MDM and QKD systems.