Han Xiuyou, Chao Meng, Su Xinxin, Wang Weiheng, Fu Shuanglin, Wu Zhenlin, Zhao Mingshan
School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China.
Micromachines (Basel). 2023 Jan 27;14(2):331. doi: 10.3390/mi14020331.
Photonic integration brings the promise of significant cost, power and space savings and propels the real applications of microwave photonic technology. In this paper, a multiband radio frequency (RF) signal simultaneous receiver using an optical bandpass filter (OBPF) integrated with a photodetector (PD) on a chip is proposed, which was experimentally demonstrated. The OBPF was composed of ring-assisted Mach-Zehnder interferometer with a periodical bandpass response featuring a box-like spectral shape. The OBPF was connected to a PD and then integrated onto a single silicon photonic chip. Phase-modulated multiband RF signals transmitted from different locations were inputted into the OBPF, by which one RF sideband was filtered out and the phase modulation to intensity modulation conversion was realized. The single sideband with carrier signals were then simultaneously detected by the PD. A proof-of-concept experiment with the silicon photonic integrated chip was implemented to simultaneously receive four channels of 8 GHz, 12 GHz, 14 GHz and 18 GHz in the X- and Ku-bands. The performance of the integrated microwave photonic multiband receiver-including the receiving sensitivity, the spurious free dynamic range, the gain and the noise figure across the whole operation frequency band-was characterized in detail.
光子集成带来了显著节省成本、功耗和空间的前景，并推动了微波光子技术的实际应用。本文提出了一种在芯片上使用与光电探测器（PD）集成的光学带通滤波器（OBPF）的多频段射频（RF）信号同时接收器，并进行了实验验证。该OBPF由具有周期性带通响应且频谱形状呈盒状的环形辅助马赫-曾德尔干涉仪组成。OBPF连接到一个PD，然后集成到单个硅光子芯片上。从不同位置发射的相位调制多频段RF信号输入到OBPF中，通过该滤波器滤除一个RF边带并实现相位调制到强度调制的转换。然后，PD同时检测带载波信号的单边带。利用硅光子集成芯片进行了概念验证实验，以同时接收X波段和Ku波段的8 GHz、12 GHz、14 GHz和18 GHz四个通道的信号。详细表征了集成微波光子多频段接收器的性能，包括整个工作频段的接收灵敏度、无杂散动态范围、增益和噪声系数。
