Overview of quantum LiDAR (Invited)
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摘要: 激光雷达由于探测精度高、功耗低、体积小、易于装备等特点,近年来广泛地应用于预警探测、制导、引信等技术中。但随着实战应用遇到的问题,如各种复杂化场景、敌方对抗干扰,以及新型作战技术的出现,激光雷达遇到了一系列急需解决的难题。文中总结了目前激光雷达在实际应用中遇到的急待解决的问题以及未来激光雷达发展的迫切需求。针对这些难题人们开始了各种探索,但是传统的探测方法和探测技术均遇到了发展瓶颈,很难有效地解决这些问题。因此人们在传统激光雷达基础上结合量子等新技术进行升级,探索下一代新体制量子激光雷达,文中进一步总结了国内外现有多种新型量子激光雷达的工作。通过现有研究成果的梳理和分析有助于深入理解和把握目前量子激光雷达的研究现状和问题,为量子激光雷达未来发展奠定基础。Abstract: LiDAR has been widely used in early warning detection, guidance, fuze and other technologies in recent years because of the advantages of high detection accuracy, low power consumption, small size and easy equipment. However, with the various complex scenarios encountered in actual combat applications, complex conditions such as enemy confrontation, jamming, and the emergence of new combat technologies, LiDAR has encountered a series of problems that need to be solved urgently. The urgent problems of LiDAR encountered in the practical applications and the urgent needs for the development of LiDAR in the future were summarized. To solve these problems, plenty effort had been devoted to various exploration, but the conventional detection methods and technologies had encountered the bottleneck of development. It was difficult to effectively solve above problems. Therefore, based on the conventional LiDAR, combined with quantum and other new technologies, LiDAR had been upgrading to the next generation of new quantum LiDAR. The work of a variety of new quantum LiDAR systems of domestic and overseas was summarized. Analyzing the research results will help to deeply understand and grasp the current research status and problems of quantum LiDAR, and lay a foundation for the future development of quantum LiDAR.
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Key words:
- quantum LiDAR /
- quantum enhancement /
- ghost imaging /
- quantum illumination
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图 9 量子照明激光雷达实验装置及结果[22]。(a)量子照明实验装置图;(b)经典照明实验装置图;(c)孪生光束的探测结果,无热噪声背景;(d)无热噪声下目标的探测结果;(e)强热噪声背景下的探测结果
Figure 9. Experimental setup and results of quantum illuminated LiDAR[22]. (a) Experimental device diagram of quantum illumination; (b) Diagram of classical lighting experimental device; (c) The detection result of twin beam without thermal noise background; (d) Target detection results without thermal noise; (e) Detection results under strong thermal noise background
图 15 基于压缩态光场的量子增强多普勒激光雷达探测方案装置图[33]。HR:高反镜,AOM:声光调制器,BS:分束器,DBS:双色分束器,OPA:光学参量放大器,PBS:偏振分束棱镜,PD:光电探测器,SA:频谱分析仪
Figure 15. Device diagram of quantum enhanced Doppler LiDAR detection scheme based on squeezed state light field[33]. HR: high reflector, AOM: acoustooptic modulator, BS: beam splitter, DBS: double beam splitter, OPA: optical parametric amplifier, PBS: polarization beam splitting prism, PD: photoelectric detector, SA: spectrum analyzer
图 20 基于QPMS的噪声容忍型三维成像实验装置[38]。MLL:锁模光纤激光器;MEMS:微机电扫描系统;ODL:光延迟线;ASE:放大自发辐射;USPD:上转换单光子探测器;Si-APD:硅雪崩光电二极管;FPGA:现场可编程门阵列
Figure 20. Experimental device of noise tolerant 3D imaging based on QPMS[38]. MLL: mode locked fiber laser; MEMS, Micro-Electro-Mechanical Systems scanning system, ODL: optical delay line, ASE: amplified spontaneous emission, USPD: upconversion single photon detector, Si-APD: silicon avalanche photodiode, FPGA: field programmable gate array
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