Theoretical and Experimental Study of Singly－resonant Optical Parametric Oscillator

ＴｈｅｏｒｅｔｉｃａｌａｎｄＥｘｐｅｒｉｍｅｎｔａｌＳｔｕｄｙｏｆＳｉｎｇｌｙ－ｒｅｓｏｎａｎｔＯｐｔｉｃａｌＰａｒａｍｅｔｒｉｃＯｓｃｉｌｌａｔｏｒ￥ＺＨＡＮＧＹｕｆｅｉ；ＺＨＡＮＧＺｈａｏｃｈｅｎ；ＷＡＮＧＸｉａｎｙｕｎ；ＣＨＥＮＳｈａｏｊｕｎ；...     

Rapid evaluation for dielectronic recombination rate coefficients of Ni－like ions Gd and Ta

ＲａｐｉｄｅｖａｌｕａｔｉｏｎｆｏｒｄｉｅｌｅｃｔｒｏｎｉｃｒｅｃｏｍｂｉｎａｔｉｏｎｒａｔｅｃｏｅｆｆｉｃｉｅｎｔｓｏｆＮｉ－ｌｉｋｅｉｏｎｓＧｄａｎｄＴａ￥ＴＥＮＧＨｕａｇｕｏ；ＸＵＺｈｉｚｈａｎ；ＺＨＡＮＧＷｅｎｑｉ（ＣＣＡＳＴ（Ｗｏｒｌｄｌａ...     

Intracavity Frequency Doubling of a New Low－threshold High－efficiency Crystal Nd：Sr_5（VO_4）_3F

ＩｎｔｒａｃａｖｉｔｙＦｒｅｑｕｅｎｃｙＤｏｕｂｌｉｎｇｏｆａＮｅｗＬｏｗ－ｔｈｒｅｓｈｏｌｄＨｉｇｈ－ｅｆｆｉｃｉｅｎｃｙＣｒｙｓｔａｌＮｄ：Ｓｒ＿５（ＶＯ＿４）＿３ＦＺＨＡＯＳｈｅｎｇｚｈｉ；ＷＡＮＧＱｉｎｇｐｕ；ＺＨＡＮＧＸｉｎｇｙｕ；ＷＡＮＧ...     

Studying the Mode－Spectra Characteristics of An Above－Threshold Biased Semiconductor Laser

ＳｔｕｄｙｉｎｇｔｈｅＭｏｄｅ－ＳｐｅｃｔｒａＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＡｎＡｂｏｖｅ－ＴｈｒｅｓｈｏｌｄＢｉａｓｅｄＳｅｍｉｃｏｎｄｕｃｔｏｒＬａｓｅｒ￥ＸＩＡＧｕａｎｇｑｉｏｎｇ；ＷＵＺｈｅｎｇｍａｏ；ＣＨＥＮＪｉａｎｇｕｏ；ＬＵＹｕｃｕ...     

Crystal Growth and Nonlinear Optical Properties of 4－Br－4＇－Methoxychalcone（BMC）

Ｃｒｙｓｔａｌ Ｇｒｏｗｔｈ ａｎｄ Ｎｏｎｌｉｎｅａｒ Ｏｐｔｉｃａｌ Ｐｒｏｐｅｒｔｉｅｓ ｏｆ ４－Ｂｒ－４＇－Ｍｅｔｈｏｘｙｃｈａｌｃｏｎｅ（ＢＭＣ）￥ＣＡＯＹａｎｇ；ＺＨＵＺｈｉｄｏｎｇ；ＳＨＥＮＸｉａｏｐｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣ...     

Generation of 2－10ns Excimer Laser Pulse by Optical Synchronizing Wave－clipping

Ｇｅｎｅｒａｔｉｏｎｏｆ２－１０ｎｓＥｘｃｉｍｅｒＬａｓｅｒＰｕｌｓｅｂｙＯｐｔｉｃａｌＳｙｎｃｈｒｏｎｉｚｉｎｇＷａｖｅ－ｃｌｉｐｐｉｎｇＸＩＡＮＧＳｈｉｑｉｎｇ；ＬＯＵＱｉｈｏｎｇ；ＤＯＮＧＪｉｎｇｘｉｎｇ；ＭＡＮＧＹａｎｐｉｎｇ；ＷＥＩＹｕｎｒ...     

Hybrid Binary Joint Transform Correlator For Adaptive Real－time Pattern Recognition

ＨｙｂｒｉｄＢｉｎａｒｙＪｏｉｎｔＴｒａｎｓｆｏｒｍＣｏｒｒｅｌａｔｏｒＦｏｒＡｄａｐｔｉｖｅＲｅａｌ－ｔｉｍｅＰａｔｔｅｒｎＲｅｃｏｇｎｉｔｉｏｎ￥ＷＡＮＧＤａｙｏｎｇ；ＸＩＥＷｅｉｘｉｎＷＡＮＧＤａｙｏｎｇ；ＸＩＥＷｅｉｘｉｎ（Ｄｅｐａｒｔｍｅｎ...     

Observation and identification of X－ray（0．3－30Bnm) multiple－order diffraction spectra

ＯｂｓｅｒｖａｔｉｏｎａｎｄｉｄｅｎｔｉｆｉｃａｔｉｏｎｏｆＸ－ｒａｙ（０．３－３０ｎｍ）ｍｕｌｔｉｐｌｅ－ｏｒｄｅｒｄｉｆｆｒａｃｔｉｏｎｓｐｅｃｔｒａＦＥＮＧＸ．Ｐ；ＨＯＵＸ．Ｂ；ＺＨＡＮＧＺ．Ｑ；ＸＵＺ．Ｚ．（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅ...     

Measurement of the First Hyperpolarizability of Substituted Ketene N，S－acetals by Hyper－Rayleigh Scattering in Solution

ＭｅａｓｕｒｅｍｅｎｔｏｆｔｈｅＦｉｒｓｔＨｙｐｅｒｐｏｌａｒｉｚａｂｉｌｉｔｙｏｆＳｕｂｓｔｉｔｕｔｅｄＫｅｔｅｎｅＮ，Ｓ－ａｃｅｔａｌｓｂｙＨｙｐｅｒ－ＲａｙｌｅｉｇｈＳｃａｔｔｅｒｉｎｇｉｎＳｏｌｕｔｉｏｎＧＡＯＸｉｎｇｙｕ；ＣＨＥＮＪｉｎｇｂ...     

Effects of He－Ne laser irradiation on enzyme activity in milking Goats＇ seminal plasma

ＥｆｆｅｃｔｓｏｆＨｅ－ＮｅｌａｓｅｒｉｒｒａｄｉａｔｉｏｎｏｎｅｎｚｙｍｅａｃｔｉｖｉｔｙｉｎｍｉｌｋｉｎｇＧｏａｔｓ＇ｓｅｍｉｎａｌｐｌａｓｍａＹＵＥＷｅｎｂｉｎ；ＺＨＥＮＧＸｉａｏｚｈｏｎｇ；ＣＵＩＢａｏｗｅｉ；ＬＩＫｅｌｕ（ＳｈａｎｘｉＡｇｒ...     

双光子光折变晶体串联回路中独立全息屏蔽空间孤子对

为了得到双光子独立全息屏蔽空间孤子对的结果,基于光折变晶体中的两波耦合和双光子光折变效应,证明在由两块双光子光折变晶体和一个电压源通过导线连接组成的串联回路中存在全息亮(暗)屏蔽孤子。每块晶体中能支持一个全息屏蔽孤子,这两个孤子称为双光子独立全息屏蔽孤子对,有明-明、暗-暗和明-暗三种类型。数值计算结果表明,在光束的空间展宽远小于晶体宽度的极限条件下,孤子对中的两孤子通过光电流和相互耦合能影响到这些孤子的空间包络和动态演化特性。     

掺Ce,Fe系列LiNbO3晶体光折变效应光存储特性

研究了系列Ce：Fe掺杂以及不同后处理态(生长态、还原态和氧化态)铌酸锂晶体的透过率光谱和光折变全息存储特性。实验结果表明单掺Ce铌酸锂晶体具有较好的图像存储质量和较宽的透过率光谱范围,二波耦合增益相对较低;高掺杂铌酸锂样品的透过率光谱范围较窄,光折变二波耦合增益较低。晶体的后处理对铌酸锂样品的光折变特性影响明显,双掺Ce:Fe还原态铌酸锂晶体具有较高的二波耦合增益;氧化态样品具有较大的透过率光谱范围;还原态样品具有较大的光折变二波耦合增益特性。实验结果还表明在同种样品中难于同时获得大的二波耦合增益和图像存储质量。     

光折变聚合物材料在光电子技术中的应用

光折变聚合物材料与光折变晶体相比，其非线性光学系数大，响应时间快，成本低廉，制备灵活，有可能成为制作光子学集成器件的材料。简要介绍了光折变聚合物材料在图像识别、光信息存储及光学相干层析技术等方面的应用情况，指出光折变聚合物材料中存在光子带隙。最后预测了光折变聚合物材料作为光子晶体在光子学器件中的应用前景。     

Optical memories implemented with photorefractive media

We consider holographic optical data storage systems implemented with photorefractive media. Our viewpoint emphasizes the close interaction between materials and device issues. First we discuss our current understanding of photorefractive physics as it pertains to the holographic data storage problem. Then we consider architecture issues, including angular, phase-encoded, and wavelength-multiplexing techniques, and several approaches to increasing the signal-to-noise ratio of the recordings. Finally, we discuss materials issues related to crystal growth and how crystal quality impacts the performance of data storage systems. Both bulk and fibre crystal growth techniques are reviewed.     

Deterministic Phase Encoded Holographic Data Storage Using Lenticular Lens Array

This work presents a novel optical holographic encrypted data storage approach based on a phase encoding multiplexed scheme. In the proposed data storage scheme, patterns to be encrypted are stored holographically in a photorefractive LiNbO₃:Fe crystal using a lenticular lens array (LLA) sheet phase-encoded multiplexing. Experimental results reveal that rotating an LLA placed as a phase modulator in the path of the reference beam is a simple but effective method of increasing the phase addresses for holographic memory in a crystal. Combining this rotational multiplexing with two-axis rotating multiplexing provides further data storage and data encryption capacity.     

Separate holographic screening soliton pairs in a biased series photorefractive crystal circuit

Holographic dark (bright) screening solitons are predicted in one dimension for a series circuit consisting of two photorefractive crystals connected electronically by electrode leads in a chain with a voltage source. Each crystal can support a holographic screening soliton. The two solitons are known collectively as a separate holographic screening soliton pair with three types: bright--bright, bright--dark and dark--dark. The numerical results show that the two solitons in a soliton pair can affect each other through a light-induced current and their coupling can affect their spatial profiles under the limit in which the optical wave has a spatial extent much less than the width of the crystal.     

Optical filter with controlled transfer function on the basis of dynamic volume holograms in barium titanate

The feasibility of optical control over the spectral characteristics of an optical filter based on 3D holographic grating recorded in a photorefractive crystal is considered. It is shown experimentally that the transfer function can be configured in real time by introducing phase shifts between the hologram sections.     

Single-mode output power enhancement of an extended cavity broad-area laser diode by an intracavity photorefractive crystal

Brightness improvement of high-power semiconductor lasers can be achieved by placing a broad-area laser diode, used as a pure optical amplifier, in an extended cavity. We report the modal behavior of an extended cavity which contains a photorefractive crystal. The dynamic holographic medium that plays the role of a spatial and spectral filter acts on the transverse and axial structure of the extended cavity modes and improves the single-mode operating range of the laser. An enhancement of the brightness in single-mode operation by a factor of seven has been experimentally observed thanks to the intracavity photorefractive crystal. PACS 42.40.Eq; 42.65.Hw; 42.55.Px     

Photorefractive sensitivity characterization of a BSO-type crystal by anisotropic self-diffraction

In this note attention is given to the holographic characterization of photorefractive sensitivity by the spatial light modulation dependence in a Bi₁₂TiO₂₀ crystal. A sample in the diffusion-only Bragg regime was used. The experiment improves the anisotropic self-diffraction properties of the material. Through this method, it is possible to find the best conditions for the fast response of the material when used as an optical holographic processor.