We report on the experimental realization of,to the best of our knowledge,the first green and orange passively mode-locked all-fiber lasers.Stable mode-locking in the burst-pulse status is achieved at the wavelengths ...We report on the experimental realization of,to the best of our knowledge,the first green and orange passively mode-locked all-fiber lasers.Stable mode-locking in the burst-pulse status is achieved at the wavelengths of 543.3 nm and 602.5 nm.The figure-9 cavity comprises the fiber end-facet mirror,gain fiber(Ho^(3+):ZBLAN fiber or Pr^(3+)/Yb^(3+):ZBLAN fiber),and fiber loop mirror(FLM).The FLM with long 460 HP fiber is not only used as an output mirror,but also acts as a nonlinear optical loop mirror for initiating visible-wavelength mode-locking.The green/orange mode-locked fiber lasers with the fundamental repetition rates of 3.779/5.662 MHz produce long bursts containing ultrashort pulses with the 0.85/0.76 GHz intra-burst repetition rates,respectively.The ultrashort intra-burst pulses stem from the dissipative four-wave-mixing effect in the highly nonlinear FLM as well as the intracavity Fabry–Perot filtering.Long bursts of 22.2/11.6 ns with ultrashort pulses of 87/62 ps are obtained in our experiment.The visible-wavelength passively mode-locked lasers in an all-fiber configuration and burst-mode would represent an important step towards miniaturized ultrafast fiber lasers and may contribute to the applications in ablation-cooling micromachining,biomedicine imaging,and scientific research.展开更多
基金National Natural Science Foundation of China(62235014,62022069,62305275)Shenzhen Science and Technology Projects(JCYJ20210324115813037).
文摘We report on the experimental realization of,to the best of our knowledge,the first green and orange passively mode-locked all-fiber lasers.Stable mode-locking in the burst-pulse status is achieved at the wavelengths of 543.3 nm and 602.5 nm.The figure-9 cavity comprises the fiber end-facet mirror,gain fiber(Ho^(3+):ZBLAN fiber or Pr^(3+)/Yb^(3+):ZBLAN fiber),and fiber loop mirror(FLM).The FLM with long 460 HP fiber is not only used as an output mirror,but also acts as a nonlinear optical loop mirror for initiating visible-wavelength mode-locking.The green/orange mode-locked fiber lasers with the fundamental repetition rates of 3.779/5.662 MHz produce long bursts containing ultrashort pulses with the 0.85/0.76 GHz intra-burst repetition rates,respectively.The ultrashort intra-burst pulses stem from the dissipative four-wave-mixing effect in the highly nonlinear FLM as well as the intracavity Fabry–Perot filtering.Long bursts of 22.2/11.6 ns with ultrashort pulses of 87/62 ps are obtained in our experiment.The visible-wavelength passively mode-locked lasers in an all-fiber configuration and burst-mode would represent an important step towards miniaturized ultrafast fiber lasers and may contribute to the applications in ablation-cooling micromachining,biomedicine imaging,and scientific research.
