面向微波光子信道化的高精细阵列波导光栅研究

Research of High Accurate Arrayed-Waveguide-Grating for Microwave Photonic Channelization

摘要:

本文针对传统信道化接收机的在瞬时工作带宽、处理速度及规模方面的技术瓶颈，提出一种基于阵列波导光栅的无源信道化方法，通过超窄通带的高精细阵列波导光栅来实现对射频调制信号在光域的窄带信道划分，设计和制备的光信道划分芯片性能稳定，封装后的通道光插损约11dB，相邻通道光隔离度大于16dB，系统验证实现了超宽带射频调制信号10GHz带宽的多通道信道化分，系统架构简洁紧凑，极大降低了信道化系统的复杂度，并且具备与微波光子前后端系统在光域全光拉通的能力，可显著减小整机微波光子链路的插入损耗，改善系统接收系统的灵敏度。

Abstract:

Aiming at breaking the technical bottlenecks of the traditional channelized receiver,such as instantaneous operating bandwidth,processing speed and scale,this paper proposes a passive channelization method based on the high-accurate arrayed- waveguide-grating. Narrowband channel division of RF modulated optical signal is realized through ultra-narrow passband arrayed-waveguide-grating. The designed and prepared optical channelization chip has stable performance. The optical insertion loss of the channel is about 11dB after package, and the optical isolation between the adjacent channel is greater than 16dB. The build channelization system demonstrates the multi-channel channel division with the 10GHz bandwidth of the ultra-wideband RF modulated optical signal. The system is compact, which can greatly reduce the complexity of the channelization system. And it can achieve all-optical interconnection with the microwave photon frontend and backend end. The insertion loss of microwave photon link can be significantly reduced and the sensitivity of receiving system can be improved.