A diode pumped Kerr-lens mode-locked femtosecond Yb：LSO laser is experimentally demonstrated for the first time. The 54fs laser pulses at central wavelength of 1052nm with a bandwidth of 22.5nm are obtained at the re...A diode pumped Kerr-lens mode-locked femtosecond Yb：LSO laser is experimentally demonstrated for the first time. The 54fs laser pulses at central wavelength of 1052nm with a bandwidth of 22.5nm are obtained at the repetition rate of 113 MHz. To the best of our knowledge, this is the shortest pulse duration ever produced from the Yb-doped orthosilicates lasers family.展开更多
We demonstrate an all-solid quasi-continuous-wave （QCW） narrow-band source tunable to sodium D2a line at 589.159 nm. The source is based on sum-frequency mixing between lasers at 1064 nm and 1319 nm in a LBO crystal...We demonstrate an all-solid quasi-continuous-wave （QCW） narrow-band source tunable to sodium D2a line at 589.159 nm. The source is based on sum-frequency mixing between lasers at 1064 nm and 1319 nm in a LBO crystal. The 1064 nm and 1319 nm lasers are produced from two diode side-pumped Nd：YAG master oscillator power amplifier （MOPA） laser systems, respectively. A 33 W output of 589 nm laser is obtained with beam quality factor M^2 = 1.25, frequency stability better than ±0.2 GHz and linewidth less than 0.44 GHz. A prototype 589 nm laser system is assembled, and a sodium laser guided star has been successfully observed in the field test.展开更多
Starting from the data obtained recently,that the crystal yttrium aluminum borat e(NAB)is an ideal material for LD pumped microchip laser is demonstrated.Coopera ting with Material Physics Department of Autonoma Unive...Starting from the data obtained recently,that the crystal yttrium aluminum borat e(NAB)is an ideal material for LD pumped microchip laser is demonstrated.Coopera ting with Material Physics Department of Autonoma University of Madrid,Ti:sappir e laser was used to simulate laser diode to pump a NAB crystal sample of 0.3mm t hickness.For incident pump power of 375mW,laser output power at 1.064μm reach 1 57mW with optical to optical efficiency as high as 42%.The corresponding effici e ncy at 1.341μm is 25%.Output laser beams belong to TEM 00 mode.The thresho ld of laser oscillation at 1.064μm were 13,18,30,100 and 140mW for output mirr ors with transmittance of 0.36%,1%,2%,4% and 6% respectively.NAB crystal has a wide and flat absorption band with half high width of 45nm for pump light and so th e temperature shift of the laser diode wavelength will not affect the pumping effi ciency.All the advantages mentioned show the this crystal is obviously an ideal material for LD pumped microchip laser. Therefrom,the possible application of a series of self ativated laser crystal developed in the seventies years 20th century will be discussed in the case of L D lasers have been well developed.展开更多
We demonstrate a high-pulse-energy, short-pulse-width passively Q-switched（PQS） Nd：YAG∕V3t：YAG laser at 1.3 μm, which is end-pumped by a pulsed laser diode. During the PQS regime, a maximum total output pulse en...We demonstrate a high-pulse-energy, short-pulse-width passively Q-switched（PQS） Nd：YAG∕V3t：YAG laser at 1.3 μm, which is end-pumped by a pulsed laser diode. During the PQS regime, a maximum total output pulse energy of 3.3 m J is obtained under an absorbed pump pulse energy of 21.9 m J. Up to 400 μJ single-pulse energy is realized with the shortest pulse width of 6.16 ns and a pulse repetition frequency of 34.1 k Hz,corresponding to a peak power of 64.9 k W. The high-energy laser pulse is operated in the dual wavelengths of 1319 and 1338 nm, which is a potential laser source for THz generation.展开更多
Nd:Sr<sub>5</sub>（VO<sub>4</sub>）<sub>3</sub>F （Nd:SVAP） is a new type of laser crystal reported in recent years. L. George declared the growth of Nd:SVAP crystal for the first ...Nd:Sr<sub>5</sub>（VO<sub>4</sub>）<sub>3</sub>F （Nd:SVAP） is a new type of laser crystal reported in recent years. L. George declared the growth of Nd:SVAP crystal for the first time at MRS fall meeting in 1993. Soon after, the laser performance of Nd:SVAP pumped by a Ti:sapphire laser was reported. With the advantages of low pumping threshold and high conversion efficiency,Nd:SVAP is suitable for compact solid-state lasers pumped by laser diodes （LD） and has wide prospects in application. In this letter, we report the experimental results of an LD-pumped Nd:SVAP laser for the first time.展开更多
The rate equations for the intracavity-frequency-doubled quasi-three-level lasers are developed. By normalizing the related parameters, it is shown that the general solution to the rate equations is dependent upon fou...The rate equations for the intracavity-frequency-doubled quasi-three-level lasers are developed. By normalizing the related parameters, it is shown that the general solution to the rate equations is dependent upon four dimensionless parameters: the normalized reabsorption loss, the pump to laser-mode size ratio, the normalized pump level, and a parameter written as nSHG, which is related to the ability of the nonlinear crystal to convert the fundamental to the second harmonic. By numerically solving these rate equations, a group of general curves are obtained to express the relations between the solution and the four dimensionless parameters.展开更多
We report on frequency doubling of high-energy,high repetition rate ns pulses from a cryogenically gas cooled multi-slab ytterbium-doped yttrium aluminum garnet laser system,Bivoj/DiPOLE,using a type-I phase matched l...We report on frequency doubling of high-energy,high repetition rate ns pulses from a cryogenically gas cooled multi-slab ytterbium-doped yttrium aluminum garnet laser system,Bivoj/DiPOLE,using a type-I phase matched lithium triborate crystal.We achieved conversion to 515 nm with energy of 95 J at repetition rate of 10 Hz and conversion efficiency of 79%.High conversion efficiency was achieved due to successful depolarization compensation of the fundamental input beam.展开更多
基金Supported by the National Basic Research Program of China under Grant No 2013CB922402the National Key Scientific Instrument and Equipment Development Project under Grant No 2012YQ120047+1 种基金the Fundamental Research Funds for the Central Universities under Grant No JB140502the National Natural Science Foundation of China under Grant Nos 11174361 and61205130
文摘A diode pumped Kerr-lens mode-locked femtosecond Yb：LSO laser is experimentally demonstrated for the first time. The 54fs laser pulses at central wavelength of 1052nm with a bandwidth of 22.5nm are obtained at the repetition rate of 113 MHz. To the best of our knowledge, this is the shortest pulse duration ever produced from the Yb-doped orthosilicates lasers family.
文摘We demonstrate an all-solid quasi-continuous-wave （QCW） narrow-band source tunable to sodium D2a line at 589.159 nm. The source is based on sum-frequency mixing between lasers at 1064 nm and 1319 nm in a LBO crystal. The 1064 nm and 1319 nm lasers are produced from two diode side-pumped Nd：YAG master oscillator power amplifier （MOPA） laser systems, respectively. A 33 W output of 589 nm laser is obtained with beam quality factor M^2 = 1.25, frequency stability better than ±0.2 GHz and linewidth less than 0.44 GHz. A prototype 589 nm laser system is assembled, and a sodium laser guided star has been successfully observed in the field test.
文摘Starting from the data obtained recently,that the crystal yttrium aluminum borat e(NAB)is an ideal material for LD pumped microchip laser is demonstrated.Coopera ting with Material Physics Department of Autonoma University of Madrid,Ti:sappir e laser was used to simulate laser diode to pump a NAB crystal sample of 0.3mm t hickness.For incident pump power of 375mW,laser output power at 1.064μm reach 1 57mW with optical to optical efficiency as high as 42%.The corresponding effici e ncy at 1.341μm is 25%.Output laser beams belong to TEM 00 mode.The thresho ld of laser oscillation at 1.064μm were 13,18,30,100 and 140mW for output mirr ors with transmittance of 0.36%,1%,2%,4% and 6% respectively.NAB crystal has a wide and flat absorption band with half high width of 45nm for pump light and so th e temperature shift of the laser diode wavelength will not affect the pumping effi ciency.All the advantages mentioned show the this crystal is obviously an ideal material for LD pumped microchip laser. Therefrom,the possible application of a series of self ativated laser crystal developed in the seventies years 20th century will be discussed in the case of L D lasers have been well developed.
基金supported by the National Natural Science Foundation of China(Grant Nos.61275142 12751426,1308042,31608042,and 51321091)the China Postdoctoral Science Foundation(Grant No.2014T70633)the Foundation for Outstanding Young Scientists in Shandong Province(Grant No.BS2012ZZ001)
文摘We demonstrate a high-pulse-energy, short-pulse-width passively Q-switched（PQS） Nd：YAG∕V3t：YAG laser at 1.3 μm, which is end-pumped by a pulsed laser diode. During the PQS regime, a maximum total output pulse energy of 3.3 m J is obtained under an absorbed pump pulse energy of 21.9 m J. Up to 400 μJ single-pulse energy is realized with the shortest pulse width of 6.16 ns and a pulse repetition frequency of 34.1 k Hz,corresponding to a peak power of 64.9 k W. The high-energy laser pulse is operated in the dual wavelengths of 1319 and 1338 nm, which is a potential laser source for THz generation.
基金Project supported by the National Natural Science Foundation of China.
文摘Nd:Sr<sub>5</sub>（VO<sub>4</sub>）<sub>3</sub>F （Nd:SVAP） is a new type of laser crystal reported in recent years. L. George declared the growth of Nd:SVAP crystal for the first time at MRS fall meeting in 1993. Soon after, the laser performance of Nd:SVAP pumped by a Ti:sapphire laser was reported. With the advantages of low pumping threshold and high conversion efficiency,Nd:SVAP is suitable for compact solid-state lasers pumped by laser diodes （LD） and has wide prospects in application. In this letter, we report the experimental results of an LD-pumped Nd:SVAP laser for the first time.
文摘The rate equations for the intracavity-frequency-doubled quasi-three-level lasers are developed. By normalizing the related parameters, it is shown that the general solution to the rate equations is dependent upon four dimensionless parameters: the normalized reabsorption loss, the pump to laser-mode size ratio, the normalized pump level, and a parameter written as nSHG, which is related to the ability of the nonlinear crystal to convert the fundamental to the second harmonic. By numerically solving these rate equations, a group of general curves are obtained to express the relations between the solution and the four dimensionless parameters.
基金This work was supported by the European Regional Development Fund and the state budget of the Czech Republic project HiLASE CoE(CZ.02.1.01/0.0/0.0/15_006/0000674)the Horizon 2020 Framework Programme(H2020)(739573).
文摘We report on frequency doubling of high-energy,high repetition rate ns pulses from a cryogenically gas cooled multi-slab ytterbium-doped yttrium aluminum garnet laser system,Bivoj/DiPOLE,using a type-I phase matched lithium triborate crystal.We achieved conversion to 515 nm with energy of 95 J at repetition rate of 10 Hz and conversion efficiency of 79%.High conversion efficiency was achieved due to successful depolarization compensation of the fundamental input beam.
