Mode-locked lasing operations at 1064 and 910 nm wavelengths are demonstrated,respectively,in two all-fiber laser oscillators using our homemade Nd^(3+)-doped silica fiber(NDF)as the gain medium.The Al3+/Nd^(3+)co-dop...Mode-locked lasing operations at 1064 and 910 nm wavelengths are demonstrated,respectively,in two all-fiber laser oscillators using our homemade Nd^(3+)-doped silica fiber(NDF)as the gain medium.The Al3+/Nd^(3+)co-doped silica core glass was fabricated by the modified sol-gel method with 18,300×10^(-6) Nd^(3+)doping concentration.The NDF drawn by the rodin-tube method has a core of 4μm in diameter and a numerical aperture(NA)of 0.14.At 1064 nm,we measure an average laser output power of 18mWwith a pulse duration of 5.75 ps,a pulse energy of 1.14 nJ,and a slope efficiency of 7.2%.Using the same NDF gain fiber of a different length,a maximum average laser output power is 3.1 mW at 910 nm with a pulse duration of 877 ns,a pulse energy of 2.7 nJ,and a slope efficiency of 1.44%.展开更多
Large-size Al^(3+)/Nd^(3+)co-doped silica glass with 5000 ppm Nd^(3+)and 50,000 ppm Al^(3+)doping concentrations was prepared by the modified sol-gel method combined with high-temperature melting and molding technolog...Large-size Al^(3+)/Nd^(3+)co-doped silica glass with 5000 ppm Nd^(3+)and 50,000 ppm Al^(3+)doping concentrations was prepared by the modified sol-gel method combined with high-temperature melting and molding technology.Electron probe microanalyzer tests indicated that high doping homogeneity was achieved with this sample preparation method.The spectral properties of the Nd^(3+)ions were evaluated.Nd^(3+)-doped silica fiber(NDF)with a core-to-clad ratio of 20/125μm was drawn from the preform with the Al^(3+)/Nd^(3+)co-doped silica glass as the core.In the laser oscillation experiment,a maximum output power of 14.6 W at 1.06μm with a slope efficiency of 39.6%was obtained from the NDF pumped by a commercial808 nm laser diode.To the best of our knowledge,this is the highest laser power reported for an NDF operated at 1060 nm and prepared by a non-chemical vapor deposition method.In the master oscillator power amplifier experiment,a maximum power of 16.6 W corresponding to a slope efficiency of 30.5%at 1061 nm was also demonstrated.The laser performance of the NDF exhibited the great advantages and potential of the modified sol-gel method in fabricating Nd^(3+)-doped silica glass for a new type of NDFs like large mode area fibers and fibers with large diameter ratio of core/cladding.展开更多
基金supported by the Key Technology Research and Development Program of Shandong Province(No.2021CXGC010202)Chinese Academy of Sciences(No.ZDBS-LY-JSC020)+1 种基金the National Key Research and Development Program of China(No.2020YFB1312802)the National Natural Science Foundation of China(Nos.61935002,62205356,and 61975216).
文摘Mode-locked lasing operations at 1064 and 910 nm wavelengths are demonstrated,respectively,in two all-fiber laser oscillators using our homemade Nd^(3+)-doped silica fiber(NDF)as the gain medium.The Al3+/Nd^(3+)co-doped silica core glass was fabricated by the modified sol-gel method with 18,300×10^(-6) Nd^(3+)doping concentration.The NDF drawn by the rodin-tube method has a core of 4μm in diameter and a numerical aperture(NA)of 0.14.At 1064 nm,we measure an average laser output power of 18mWwith a pulse duration of 5.75 ps,a pulse energy of 1.14 nJ,and a slope efficiency of 7.2%.Using the same NDF gain fiber of a different length,a maximum average laser output power is 3.1 mW at 910 nm with a pulse duration of 877 ns,a pulse energy of 2.7 nJ,and a slope efficiency of 1.44%.
基金supported by the National Natural Science Foundation of China(NSFC)(No.61975216)Zhejiang Postdoctoral Research Project(No.ZJ2020070)。
文摘Large-size Al^(3+)/Nd^(3+)co-doped silica glass with 5000 ppm Nd^(3+)and 50,000 ppm Al^(3+)doping concentrations was prepared by the modified sol-gel method combined with high-temperature melting and molding technology.Electron probe microanalyzer tests indicated that high doping homogeneity was achieved with this sample preparation method.The spectral properties of the Nd^(3+)ions were evaluated.Nd^(3+)-doped silica fiber(NDF)with a core-to-clad ratio of 20/125μm was drawn from the preform with the Al^(3+)/Nd^(3+)co-doped silica glass as the core.In the laser oscillation experiment,a maximum output power of 14.6 W at 1.06μm with a slope efficiency of 39.6%was obtained from the NDF pumped by a commercial808 nm laser diode.To the best of our knowledge,this is the highest laser power reported for an NDF operated at 1060 nm and prepared by a non-chemical vapor deposition method.In the master oscillator power amplifier experiment,a maximum power of 16.6 W corresponding to a slope efficiency of 30.5%at 1061 nm was also demonstrated.The laser performance of the NDF exhibited the great advantages and potential of the modified sol-gel method in fabricating Nd^(3+)-doped silica glass for a new type of NDFs like large mode area fibers and fibers with large diameter ratio of core/cladding.
