中国航空工业集团公司雷华电子技术研究所, 江苏 无锡 214000
基于交叉学科融合的微波光子技术是新体制机载雷达的重要发展方向之一, 能够用光学方法完成在电域中难以实现甚至无法实现的射频信号处理与高速传输等功能。国内微波光子雷达系统研究仍处于功能演示阶段, 亟需面向实际作战需求的系统级验证手段来提升机载微波光子雷达的工程化进程。提出了一种面向系统性能评估的机载微波光子雷达集成验证系统, 分析了系统级验证的必要性, 论述了集成验证系统的关键构成要素和性能指标映射与评估方法, 并总结了所提集成验证系统的优势。
机载雷达 微波光子 集成验证系统 指标映射与评估 airborne radar microwave photonic integrated validation system index mapping and evaluation
Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic information, Huazhong University of Science and Technology, Wuhan 430074, China
Frontiers of Optoelectronics
2018, 11(4): 407–412
Author Affiliations
Abstract
1 Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
2 Beijing Advanced Innovation Center for Imaging Technology and Key Laboratory of Terahertz Optoelectronics (MoE), Department of Physics, Capital Normal University, Beijing 100048, China
Previous research shows that few-cycle laser (FCL) pulses with low energy and without a bias field can be used to coherently detect terahertz (THz) pulses. As we know, it is very difficult to stabilize the carrier envelope phase (CEP) of FCL pulses, i.e., there are some random fluctuations for the CEP. Here we theoretically investigate the influence of such instability on the accuracy of THz detection. Our results show that although there is an optimum CEP for THz detection, the fluctuations of the CEP will lead to terrible thorns on the detected THz waveform. In order to solve this problem, we propose an approach using two few-cycle laser pulses with opposite CEPs, i.e., their CEPs are differed by π.
040.2235 Far infrared or terahertz 320.7100 Ultrafast measurements Chinese Optics Letters
2018, 16(9): 090401
