A New Fourier Iterative Algorithm for the Design of Phase－only Diffractive Optical Element Used in Laser Beam Shaping

ＡＮｅｗＦｏｕｒｉｅｒＩｔｅｒａｔｉｖｅＡｌｇｏｒｉｔｈｍｆｏｒｔｈｅＤｅｓｉｇｎｏｆＰｈａｓｅ－ｏｎｌｙＤｉｆｆｒａｃｔｉｖｅＯｐｔｉｃａｌＥｌｅｍｅｎｔＵｓｅｄｉｎＬａｓｅｒＢｅａｍＳｈａｐｉｎｇＳＡＮＧＴａｏ；ＬＩＡＯＪｉａｎｇｈｏｎｇ；ＬＵＺ...     

Nonlinear Distortion Analyses in IM-DD SCM Lightwave Systems

ＮｏｎｌｉｎｅａｒＤｉｓｔｏｒｔｉｏｎＡｎａｌｙｓｅｓｉｎＩＭ－ＤＤＳＣＭＬｉｇｈｔｗａｖｅＳｙｓｔｅｍｓ￥ＳＯＮＧＨａｉｙａｎ；ＧＵＷａｎｙｉ；ＬＩＧｕｏｒｕｉ；ＸＵＤａｘｉｏｎｇ（ＤｅｐｔｏｆＴｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎＥｎｇ．Ｂｅｉｊｉｎ...     

Diffractive lens with binary phase levels to generate two focuses

ＤｉｆｆｒａｃｔｉｖｅｌｅｎｓｗｉｔｈｂｉｎａｒｙｐｈａｓｅｌｅｖｅｌｓｔｏｇｅｎｅｒａｔｅｔｗｏｆｏｃｕｓｅｓＬＯＮＧＰｉｎ；ＬＩＵＪｉｅ；ＳＨＩＷｅｎｍｉｎ；ＨＳＵＤａｈｓｉｕｎｇ（ＤｅｐａｒｔｍｅｎｆｏｆＡｐｐｌｉｅｄＳｃｉｅｎｃｅａｎｄＴｅｃ...     

Study of the Frog-legs Phase Conjugator in BaTiO_3

Ｓｔｕｄｙ　ｏｆ　ｔｈｅ　Ｆｒｏｇ－ｌｅｇｓ　Ｐｈａｓｅ　Ｃｏｎｊｕｇａｔｏｒ　ｉｎ　ＢａＴｉＯ_３ＳｔｕｄｙｏｆｔｈｅＦｒｏｇ－ｌｅｇｓＰｈａｓｅＣｏｎｊｕｇａｔｏｒｉｎＢａＴｉＯ_３￥ＷＡＮＧＬｉｊｕｎ；ＷＡＮＧＪｉａｙｏｕ；ＧＵＯＳｉｊｉ（Ｄｅｐ...     

Self-programming Optical Logic Processor by using the PROM Device

Ｓｅｌｆ－ｐｒｏｇｒａｍｍｉｎｇＯｐｔｉｃａｌＬｏｇｉｃＰｒｏｃｅｓｓｏｒｂｙｕｓｉｎｇｔｈｅＰＲＯＭＤｅｖｉｃｅ￥ＷＡＮＧＢｉｎｑｕａｎ；ＬＩＵＬｉｒｅｎ；ＰＥＮＧＨａｉｆｅｎｇ；ＬＩＡＮＧＦｅｎｇ（ＩｎｆｏｒｍａｔｉｏｎＯｐｔｉｃｓＬａｂｏｒａｔ...     

A Quenched Dye Laser Pumped by a KrF Excimer Laser

ＡＱｕｅｎｃｈｅｄＤｙｅＬａｓｅｒＰｕｍｐｅｄｂｙａＫｒＦＥｘｃｉｍｅｒＬａｓｅｒ￥ＸＵＥＳｈａｏｌｉｎ；ＬＯＵＱｉｈｏｎｇ；ＨＵＡＮＧＨｕｉｊｉｅ；ＤＵＬｏｎｇｌｏｎｇ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃｓａｎｄＦｉｎｅＭｅｃｈａｎｉ...     

Stimulated Brillouin scattering（SBS） excited with a phase－modulated pump laser

Ｓｔｉｍｕｌａｔｅｄ Ｂｒｉｌｌｏｕｉｎ ｓｃａｔｔｅｒｉｎｇ（ＳＢＳ） ｅｘｃｉｔｅｄ ｗｉｔｈ ａ ｐｈａｓｅ－ｍｏｄｕｌａｔｅｄ ｐｕｍｐ ｌａｓｅｒ￥ＷＥＮＧｕｏｊｕｎ；ＱＩＡＮＬｉｅｊｉａ；ＬＵＪｕｎｘｉａｏ；ＦＡＮＤｉａｎｙｕａｎ；ＤＥＮ...     

110 Kilowatt Q -Switched Pulse Diode Pumped Nd: YAG Slab Laser

１１０ＫｉｌｏｗａｔｔＱ－ＳｗｉｔｃｈｅｄＰｕｌｓｅＤｉｏｄｅＰｕｍｐｅｄＮｄ：ＹＡＧＳｌａｂＬａｓｅｒ￥ＺＨＯＵＦｕｚｈｅｎｇ；ＣＨＥＮＹｏｕｍｉｎｇ；ＨＵＷｅｎｔａｏ；ＬＩＺｈｉｓｈｅｎ；ＳＨＥＮＬｉｑｏｎｇ；ＣＨＥＮＱｉｕｓｈｕｉ；ＦＡＮＤｉａ...     

Coherence and Decoherence Effects on Lasing with o without Population Inversion in a Four-level Atomic System

ＣｏｈｅｒｅｎｃｅａｎｄＤｅｃｏｈｅｒｅｎｃｅＥｆｅｃｔｓｏｎＬａｓｉｎｇｗｉｔｈｏｒｗｉｔｈｏｕｔＰｏｐｕｌａｔｉｏｎＩｎｖｅｒｓｉｏｎｉｎａＦｏｕｒｌｅｖｅｌＡｔｏｍｉｃＳｙｓｔｅｍＧＯＮＧＳｈａｎｇｑｉｎｇＤＵＳｉｄｅＬＩＹｕａｎＸＵＺｈｉ...     

Detection Theory of Polydispersities by Dynamic Light Scattering

ＤｅｔｅｃｔｉｏｎＴｈｅｏｒｙｏｆＰｏｌｙｄｉｓｐｅｒｓｉｔｉｅｓｂｙＤｙｎａｍｉｃＬｉｇｈｔＳｃａｔｅｒｉｎｇＺＨＡＮＧＹｉｘｉｎＺＨＵＴｏｕＺＨＡＮＧＪｉａｎｈｕａ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃｓ，ＷｕｘｉＵｎｉｖｅｒｓｉｔｙｏｆＬｉ...     

Statistical properties of a two-photon cavity mode in the presence of degenerate parametric amplifier

A Hamiltonian model that includes two-photon interaction with a two-level atom and a degenerate parametric amplifier is considered. By invoking a canonical transformation an exact solution of the wave function in the Schrödinger picture is obtained. The result presented in this context is employed to discuss the purity, the entropy squeezing, and the variance squeezing, in addition to the normal squeezing. It has been shown that the existence of the second harmonic generation leads to reduction in the squeezing amount for all quadrature variances and we found that as the value of the coupling parameter λ₂ increases the squeezing phenomenon gets more apparent. Further we have also considered the Q-function as an example of the quasi-probability distribution.     

在腔场与可移动镜子系统中对镜子位置的测量

描述利用腔场与镜的相互作用,对镜的位置坐标进行测量选域以使腔场变为Fock态的叠加态.并进一步讨论其压缩特性及相干性,通过数值计算,发现该腔场有非经典效应,即有一定的压缩效应和反聚束效应.     

相干态的叠加态的量子统计性质

本文研究了相干态的叠加态的量子统计性质.结果表明,相干态的叠加态仅存在奇次幂的高阶压缩效应,而不存在偶次幂的高阶压缩效应.给出了高阶压缩和高阶反聚束效应与叠加系数间的函数关系.高阶压缩要求叠加系数的辐角取值满足cosθ>exp(-2|α|²),而高阶反聚束效应则要求0.5π<θ<1.5π.奇偶相干态的有关结果均作为特例应包含在本文的一般结论之中.     

与运动原子相互作用的场的压缩效应

采用量子光学中时间演化算符方法，研究了与运动原子相互作用的场的压缩效应，揭示了光场的初始平均光子数和场模结构参数对光场压缩特性的影响，结果表明：适当选择系统参数，可获得在时间上持续压缩的压缩光。     

有限维希尔伯特空间q-畸变谐振子偶相干态及其压缩和反聚束特性

从一般形式上构造了有限维希尔伯特（Ｈｉｌｂｅｒｔ）空间ｑ－畸变谐振子的偶相干态,并讨论了其量子统计特性。发现有限维希尔伯特空间的偶ｑ－相干态与通常无限维空间的偶ｑ－相干态或偶相干态有明显不同的压缩和反聚束特性。前者的偶ｑ－相干态不仅出现正交压缩,而且出现反聚束效应。     

Nonzero Temperature Squeezing of the Time—Dependent Harmonic Oscillator and the Applications to the Capacitive Coupled Electric Circuit

A new way to calculate the nonzero temperature quantum fluctuations of the time-dependent harmonic oscillator is proposed and the properties of squeezing are exactly given.The method is applied to the capacitive coupled electric circuit.It is explicitly shown that squeezing can appear and the squeezing parameters are related to the physical quantities of the coupled circuit.     

场频率随时间变化对原子偶极压缩效应的影响

利用J-C模型,考虑场频率随时间以正弦函数形式作小量变化,在旋波近似下,研究了二能级原子通过单光子跃迁与单模辐射场相互作用系统中原子算符Sy压缩效应的演化规律.利用数值计算方法给出压缩量随时间的演化曲线.研究结果表明:原子算符压缩效应的演化受场频率随时间正弦函数形式变化的调制,场频率振荡的幅值u越大调制作用越强.随场频率变化的幅值u的增大,压缩效应减弱.在场频率振荡的幅值u大于一定值后,压缩量将按场频率周期性的变化规律作周期性振荡,     

Nonclassical Properties in Mesoscopic Josephson Junction with Excited Even and Odd Coherent States

Dynamic evolution of a mesoscopic Josephson junction (MJJ) interacting with excited even and odd coherent states is studied. It is shown that the supercurrent in MJJ exhibits both collapse and revival (CR) phenomenon and squeezing effect. It is also shown that the CR and squeezing of supercurrent are related to degree of excitation and average photon number.     

Nonclassical Properties in Mesoscopic Josephson Junction with Excited Even and Odd Coherent States

Dynamic evolution of a mesoscopic Josephson junction (M J J) interacting with excited even and odd coherent states is studied. It is shown that the supercurrent in MJJ exhibits both collapse and revival (CR) phenomenon and squeezing effect. It is also shown that the CR and squeezing of supercurrent are related to degree of excitation and average photon number.     

与q形变玻色算符逆算符相关的相干态及其量子统计性质

讨论了ｑ形变玻色算符的广义逆算符作用于ｑ－相干态所得到的两类量子态的数学及量子统计性质。结果表明，ｑ－相干态的光子激发态不存在压缩但呈现反聚束效应，而ｑ－相干态的光子湮灭态却存在压缩但不呈现反聚束效应。