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Visible-light all-fiber vortex lasers based on mode selective couplers

董楚楚  邹金海  王鸿健  尧涵  曾祥龙  卜轶坤  罗正钱  
【摘要】:We demonstrate visible-light all-fiber vortex lasers by incorporating the home-made mode selective couplers(MSCs).The MSC at green or red wavebands is fabricated by specially designing and fusing a single-mode fiber(SMF) and a few-mode fiber(FMF).The MSCs inserted into visible fiber cavities act as power splitters and mode converters from the LP_(01) to LP_(11) mode at green and red wavelengths,respectively.The red-light all-fiber vortex laser is formed by a 10-cm Pr~(3+)/Yb~(3+):ZBLAN fiber,a fiber Bragg grating,a fiber end-facet mirror and the MSC at 635 nm,which generates vortex beams with OAM_(±1) at 634.4 nm and an output power of 13 mW.The green-light all-fiber vortex laser consists of a 12-cm Ho~(3+):ZBLAN fiber,two fiber pigtail mirrors,and the MSC at 550 nm,which generates vortex beams with OAM_(±1) at548.9 nm and an output power of 3 mW.

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