A wavelength-tunable mode-locked quantum dot laser using an InAs/GaAs quantum-dot gain medium and a discrete semiconductor saturable absorber mirror is demonstrated. A dispersion prism, which has lower optical loss an...A wavelength-tunable mode-locked quantum dot laser using an InAs/GaAs quantum-dot gain medium and a discrete semiconductor saturable absorber mirror is demonstrated. A dispersion prism, which has lower optical loss and less spectral narrowing than a blazed grating, is used for wavelength selection and tuning. A wavelength tuning range of 45.5 nm （from 1137.3 nm to 1182.8 nm） under 140-mA injection current in the passive mode-locked regime is achieved. The maximum average power of 19 mW is obtained at the 1170.3-nm wavelength, corresponding to the single pulse energy of 36.5 pJ.展开更多
A high-energy pulsed vacuum ultraviolet(VUV) solid-state laser at 177 nm with high peak power by the sixth harmonic of a neodymium-doped yttrium aluminum garnet(Nd:YAG) amplifier in a KBe_(2)BO_(3)F_(2) prism-coupled ...A high-energy pulsed vacuum ultraviolet(VUV) solid-state laser at 177 nm with high peak power by the sixth harmonic of a neodymium-doped yttrium aluminum garnet(Nd:YAG) amplifier in a KBe_(2)BO_(3)F_(2) prism-coupled device was demonstrated. The ultraviolet(UV) pump laser is a 352 ps pulsed, spatial top-hat super-Gaussian beam at 355 nm.A high energy of a 7.12 mJ VUV laser at 177 nm is obtained with a pulse width of 255 ps, indicating a peak power of 28 MW, and the conversion efficiency is 9.42% from 355 to 177 nm. The measured results fitted well with the theoretical prediction. It is the highest pulse energy and highest peak power ever reported in the VUV range for any solid-state lasers.The high-energy, high-peak-power, and high-spatial-uniformity VUV laser is of great interest for ultra-fine machining and particle-size measurements using UV in-line Fraunhofer holography diagnostics.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.61274072)the National High Technology Research and Development Program of China(Grant No.2013AA014201)
文摘A wavelength-tunable mode-locked quantum dot laser using an InAs/GaAs quantum-dot gain medium and a discrete semiconductor saturable absorber mirror is demonstrated. A dispersion prism, which has lower optical loss and less spectral narrowing than a blazed grating, is used for wavelength selection and tuning. A wavelength tuning range of 45.5 nm （from 1137.3 nm to 1182.8 nm） under 140-mA injection current in the passive mode-locked regime is achieved. The maximum average power of 19 mW is obtained at the 1170.3-nm wavelength, corresponding to the single pulse energy of 36.5 pJ.
基金supported by the National Key Research and Development Program of China(No.2023YFB3610601)the International Partnership Program for Grand Challenges of the Chinese Academy of Sciences(No.174GJHZ2022016GC)the National Special Program for High-level Talents Science and Technology(No.SQ2022RA24910010)
文摘A high-energy pulsed vacuum ultraviolet(VUV) solid-state laser at 177 nm with high peak power by the sixth harmonic of a neodymium-doped yttrium aluminum garnet(Nd:YAG) amplifier in a KBe_(2)BO_(3)F_(2) prism-coupled device was demonstrated. The ultraviolet(UV) pump laser is a 352 ps pulsed, spatial top-hat super-Gaussian beam at 355 nm.A high energy of a 7.12 mJ VUV laser at 177 nm is obtained with a pulse width of 255 ps, indicating a peak power of 28 MW, and the conversion efficiency is 9.42% from 355 to 177 nm. The measured results fitted well with the theoretical prediction. It is the highest pulse energy and highest peak power ever reported in the VUV range for any solid-state lasers.The high-energy, high-peak-power, and high-spatial-uniformity VUV laser is of great interest for ultra-fine machining and particle-size measurements using UV in-line Fraunhofer holography diagnostics.
