Experimental generation of stable mode-locked pulses and cylindrical vector beams(CVBs),from an all fewmode fiber(FMF)ring laser is first reported,to the best of our knowledge.In this laser,a section of few-mode erbiu...Experimental generation of stable mode-locked pulses and cylindrical vector beams(CVBs),from an all fewmode fiber(FMF)ring laser is first reported,to the best of our knowledge.In this laser,a section of few-mode erbium-doped fiber(FM-EDF)is used as the gain medium.The FM-EDF is pumped by 976nm laser with LP11 mode,which is simultaneously converted and multiplexed through a homemade hybrid device,i.e.,wavelength division multiplexing-mode selection coupler(WDM-MSC).All the components in our experiment are connected using FMF.The resulted CVB pulses have a spectral width of 0.33 nm with a repetition rate of 30.58 MHz under the pump power of 340 m W.Moreover,both azimuthally and radially polarized CVBs were achieved with a high purity of>95%.This mode-locked CVB fiber laser with an all FMF configuration opens the way to manipulate the transverse mode in mode-locked fiber lasers.展开更多
基金supported by the Natural Science Foundation of Jiangsu Province(Nos.BK20161521 and BK20180742)Six Talent Peaks Project in Jiangsu Province(No.2015-XCL-023 P)+1 种基金Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX18_0856)Talents Projects in Nanjing University of Posts and Telecommunications(Nos.NY214002 and NY215002)
文摘Experimental generation of stable mode-locked pulses and cylindrical vector beams(CVBs),from an all fewmode fiber(FMF)ring laser is first reported,to the best of our knowledge.In this laser,a section of few-mode erbium-doped fiber(FM-EDF)is used as the gain medium.The FM-EDF is pumped by 976nm laser with LP11 mode,which is simultaneously converted and multiplexed through a homemade hybrid device,i.e.,wavelength division multiplexing-mode selection coupler(WDM-MSC).All the components in our experiment are connected using FMF.The resulted CVB pulses have a spectral width of 0.33 nm with a repetition rate of 30.58 MHz under the pump power of 340 m W.Moreover,both azimuthally and radially polarized CVBs were achieved with a high purity of>95%.This mode-locked CVB fiber laser with an all FMF configuration opens the way to manipulate the transverse mode in mode-locked fiber lasers.
