High-power linear-polarization burst-mode all-fibre laser and generation of frequency-adjustable microwave signal  

作　　者：Xuan He Bin Zhang Shuailin Liu Jinmei Yao Qilin Wu Yuxin Zhao Tao Xun Linyong Yang Jing Hou 

机构地区：[1]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha410073,China [2]State Key Laboratory of Pulsed Power Laser Technology,Changsha410073,China [3]Hunan Provincial Key Laboratory of High Energy Laser Technology,Changsha410073,China

出　　处：《High Power Laser Science and Engineering》2021年第2期1-7,共7页高功率激光科学与工程（英文版）

摘　　要：Narrowband microwave generation with tuneable frequency is demonstrated by illuminating a photoconductive semiconductor switch(PCSS)with a burst-mode fibre laser.The whole system is composed of a high-power linearly polarized burst-mode pulsed fibre laser and a linear-state PCSS.To obtain a high-performance microwave signal,a desired envelope of burst is necessary and a pulse pre-compensation technique is adopted to avoid envelope distortion induced by the gain-saturation effect.Resulting from the technique,homogenous peak power distribution in each burst is ensured.The maximum energy of the laser burst pulse reaches 200μJ with a burst duration of 100 ns at the average power of 10 W,corresponding to a peak power of 4 kW.When the PCSS is illuminated by the burst-mode fibre laser,narrowband microwave generation with tuneable frequency(0.80-1.12 GHz)is obtained with a power up to 300 W.To the best of the authors’knowledge,it is the first demonstration of frequency-tuneable narrowband microwave generation based on a fibre laser.The high-power burst-mode fibre laser reported here has great potential for generating high-power arbitrary microwave signals for a great deal of applicable demands such as smart adaptive radar and intelligent high-power microwave systems.

关 键 词：burst-mode pulse fibre laser linear polarization microwave signal 

分 类 号：TN248[电子电信—物理电子学]