Optical channel waveguides with depressed cladding configurations have been produced in Nd,Gd∶CaF_(2)laser crystals by using ultrafast laser inscription.Waveguide properties are investigated in terms of guiding behav...Optical channel waveguides with depressed cladding configurations have been produced in Nd,Gd∶CaF_(2)laser crystals by using ultrafast laser inscription.Waveguide properties are investigated in terms of guiding behaviors and localized laserinduced lattice damages.Under an optical pump of 808 nm light,continuous-wave waveguide lasing at 1.06μm is achieved,with a single-mode operation and a minimum lasing threshold of 98.8 m W.Furthermore,the visible emissions of Nd^(3+)with short wavelengths ranging from 415 nm to 550 nm and long wavelengths from 550 nm to 625 nm are observed upon 808 nm laser excitation via the up-converted process.The intensity ratios of two wavelength ranges are proved to be tunable through changing the pumping polarizations.展开更多
Depressed cladding waveguides are fabricated in Pr:LiYF_(4)(YLF)crystal by femtosecond laser inscription following a helical scheme.With the optimized parameters,the propagation loss of the waveguide is around 0.12 dB...Depressed cladding waveguides are fabricated in Pr:LiYF_(4)(YLF)crystal by femtosecond laser inscription following a helical scheme.With the optimized parameters,the propagation loss of the waveguide is around 0.12 dB/cm for multimode guiding.Under optical pumping with InGaN laser diodes at 444 nm,efficient waveguide lasers in the orange around604 nm(π-polarized)are achieved with minimum lasing threshold of 119.8 mW,maximum slope efficiency of 16.6%,and maximum output power of 120.6 mW.Benefiting from their optimized performances,the waveguides produced in this work are promising for applications as compact orange laser sources.展开更多
基金supported by the National Key Research and Development Project of China(No.2019YFA0705000)the National Natural Science Foundation of China(NSFC)(Nos.11874243,11525418,91750201,and 11974218)+1 种基金the Innovation Group of Jinan(No.2018GXRC010)the Local Science and Technology Development Project of the Central Government(No.YDZX20203700001766)。
文摘Optical channel waveguides with depressed cladding configurations have been produced in Nd,Gd∶CaF_(2)laser crystals by using ultrafast laser inscription.Waveguide properties are investigated in terms of guiding behaviors and localized laserinduced lattice damages.Under an optical pump of 808 nm light,continuous-wave waveguide lasing at 1.06μm is achieved,with a single-mode operation and a minimum lasing threshold of 98.8 m W.Furthermore,the visible emissions of Nd^(3+)with short wavelengths ranging from 415 nm to 550 nm and long wavelengths from 550 nm to 625 nm are observed upon 808 nm laser excitation via the up-converted process.The intensity ratios of two wavelength ranges are proved to be tunable through changing the pumping polarizations.
基金supported by the National Key Research and Development Program of China(No.2019YFA0705000)National Natural Science Foundation of China(NSFC)(Nos.11874243,12192254,91750201,and 11974218)+1 种基金Innovation Group of Jinan(No.2018GXRC010)Local Science and Technology Development Project of the Central Government(No.YDZX20203700001766)。
文摘Depressed cladding waveguides are fabricated in Pr:LiYF_(4)(YLF)crystal by femtosecond laser inscription following a helical scheme.With the optimized parameters,the propagation loss of the waveguide is around 0.12 dB/cm for multimode guiding.Under optical pumping with InGaN laser diodes at 444 nm,efficient waveguide lasers in the orange around604 nm(π-polarized)are achieved with minimum lasing threshold of 119.8 mW,maximum slope efficiency of 16.6%,and maximum output power of 120.6 mW.Benefiting from their optimized performances,the waveguides produced in this work are promising for applications as compact orange laser sources.
