首页|High-power mode-programmable orbital angular momentum beam emitter with an internally sensed optical phased array

High-power mode-programmable orbital angular momentum beam emitter with an internally sensed optical phased array

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The high-power mode-programmable orbital angular momentum[OAM]beam has attracted significant attention in a wide range of applications,such as long-distance optical communication,nonlinear frequency conversion,and beam shaping.Coherent beam combining[CBC]of an optical phased array[OPA]can offer a promising solution for both generating the high-power OAM beam and rapidly switching the OAM modes.However,achieving real-time phase noise locking and for-mation of desired phase structures in a high-power CBC system faces significant challenges.Here,an internal phase-sens-ing technique was utilized to generate the high-power OAM beam,which effectively mitigated thermal effects and eliminated the need for large optical devices.An OPA with six elements was employed for experimental demonstration.The first effective generation of over 1.5 kW mode-programmable OAM beam in a continuous-wave domain was presented.Moreover,the results demonstrated that the generated OAM beam could be modulated with multiple dimensions.The topo-logical charge can be switched in real time from-1 to-2.Notably,this OAM beam emitter could function as an OAM beam copier by easily transforming a single OAM beam into an OAM beam array.More importantly,a comprehensive analysis was conducted on power scaling,mode switching speed,and expansion of OAM modes.Additionally,the system's compact design enabled it to function as a packageable OAM beam emitter.Owing to the advantages of having high power and programmable modes with multiple dimension modulation in phase structures and intensity distribution,this work can pave the way for producing high-power structured light beams and advancing their applications.

orbital angular momentumoptical vortexoptical phased arraycoherent beam combining

龙金虎、邓宇、高志强、常洪祥、常琦、马阎星、吴坚、粟荣涛、马鹏飞、周朴

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College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China

Nanhu Laser Laboratory,National University of Defense Technology,Changsha 410073,China

Hunan Provincial Key Laboratory of High Energy Laser Technology,National University of Defense Technology,Changsha 410073,China

国家自然科学基金国家自然科学基金湖南省自然科学基金Training Program for Excellent Young Innovators of ChangshaPostgraduate Scientific Research Innovation Project of Hunan Province

62275272620752422019JJ10005kq2206003QL20220013

2024

10.3788/COL202422.021402

中国光学快报(英文版)
中国光学学会 中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD
影响因子：1.305
ISSN：1671-7694
年,卷(期)：2024.22(2)
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