A new kind of four-mode continuous variable coherent-entangled state is proposed in the Fock space by using the technique of integration within an ordered product, which exhibits both the properties of a coherent stat...A new kind of four-mode continuous variable coherent-entangled state is proposed in the Fock space by using the technique of integration within an ordered product, which exhibits both the properties of a coherent state and an entangled state, and spans a complete and orthonormal representation. The conjugate state of the four-mode continuous variable coherent-entangled state is derived by using the Fourier transformation. Moreover, a simple experimental protocol of generating a four-mode continuous variable coherent-entangled state is proposed by using beam splitters. As applications of this four-mode continuous variable coherent-entangled state, a four-mode entangled state and a four-mode squeezing-Fresnel operator are constructed.展开更多
We report an all-fiber-based master oscillator power amplifier picosecond ytterbium-doped fiber laser with an average power of 102W and a spectral line width of 0.1 nm.The seed source is a compact single mode passivel...We report an all-fiber-based master oscillator power amplifier picosecond ytterbium-doped fiber laser with an average power of 102W and a spectral line width of 0.1 nm.The seed source is a compact single mode passively mode-locked fiber laser with an average power of 2.48 W.Finally,the laser maximum average output power of 102W picosecond pulses is realized by a direct all-fiber amplifier structure in one stage.The experiment enables the optical-to-optical conversion efficiency to reach 61.4%,with the central wavelength of 1063.7nm.A significant feature of this experiment is the spectral line width of 0.1 nm.The spectrum has no broadening or nonlinear effects when the pump is strengthened.展开更多
基金Project supported by the Natural Science Foundation of Shandong Province,China(Grant No.Y2008A16)the Specialized Research Fund for the Doctoral Program of Higher Education,China(Grant No.20103705110001)+1 种基金the University Experimental Technology Foundation of Shandong Province,China(Grant No.S04W138)the Natural Science Foundation of HezeUniversity of Shandong Province,China(Grants Nos.XY07WL01 and XY08WL03)
文摘A new kind of four-mode continuous variable coherent-entangled state is proposed in the Fock space by using the technique of integration within an ordered product, which exhibits both the properties of a coherent state and an entangled state, and spans a complete and orthonormal representation. The conjugate state of the four-mode continuous variable coherent-entangled state is derived by using the Fourier transformation. Moreover, a simple experimental protocol of generating a four-mode continuous variable coherent-entangled state is proposed by using beam splitters. As applications of this four-mode continuous variable coherent-entangled state, a four-mode entangled state and a four-mode squeezing-Fresnel operator are constructed.
文摘We report an all-fiber-based master oscillator power amplifier picosecond ytterbium-doped fiber laser with an average power of 102W and a spectral line width of 0.1 nm.The seed source is a compact single mode passively mode-locked fiber laser with an average power of 2.48 W.Finally,the laser maximum average output power of 102W picosecond pulses is realized by a direct all-fiber amplifier structure in one stage.The experiment enables the optical-to-optical conversion efficiency to reach 61.4%,with the central wavelength of 1063.7nm.A significant feature of this experiment is the spectral line width of 0.1 nm.The spectrum has no broadening or nonlinear effects when the pump is strengthened.
