Cu:KNSBN晶体自泵浦与互泵浦相位共轭共存特性的实验研究

利用Cu:KNSBN晶体,研究了在两束泵浦光对称入射的条件下,自泵浦与互泵浦相位共轭共存时相互竞争和相互影响的特性,以及共存时的相位共轭特性与两束泵浦光的入射位置、入射夹角和泵浦比之间的关系,并对自泵浦相位共轭反射率和两束泵浦光共同存在条件下的自泵浦相位共轭反射率进行了比较.     

Cu∶KNSBN晶体自泵浦与互泵浦相位共轭共存特性的实验研究

利用Cu∶KNSBN晶体,研究了在两束泵浦光对称入射的条件下,自泵浦与互泵浦相位共轭共存时相互竞争和相互影响的特性,以及共存时的相位共轭特性与两束泵浦光的入射位置、入射夹角和泵浦比之间的关系,并对自泵浦相位共轭反射率和两束泵浦光共同存在条件下的自泵浦相位共轭反射率进行了比较.     

Ce：KNSBN晶体中产生的双泵浦相位共轭

首次报道在Ｃｅ：ＫＮＳＢＮ晶体中产生的“双”泵浦相位共轭现象，同时还观察到由同一“双”泵浦相位共轭光路所产生的自泵浦相位共轭和四波混频现象。     

Cu：KNSBN鸟翼式互泵浦相位共轭器的实验研究

利用Ｃｕ：ＫＮＳＢＮ实现了鸟翼式互泵浦相位共轭器，并给出一些实验现象和规律。     

高速调制光自泵浦-互泵浦相位共轭共存实验研究

利用Cu:KNSBN晶体的慢响应光折变效应,研究了高速振幅调制的自泵浦互泵浦相位共轭共存特性,给出了相互作用光的调制频率和入射位置对其相位共轭反射率的影响实验结果表明,自泵浦与互泵浦相位共轭共存时,相位共轭光可以无失真的传输时域信息,因而可用于光通信及时域光信息处理.     

Ce:KNSBN晶体中超短激光脉冲二波耦合和四波混频相位共轭

脉宽为50～60ps的超短激光脉冲列在Ce:KNSBN晶体中实现二波耦合和四波混频相位共轭。环境的微振动使二波耦合和四波混频相位共轭信号变得不稳定。当泵浦光脉冲从相对于探测光脉冲早到变为迟到时,二波耦合探测光信号从缩小变到放大。四波混频相位共轭信号出现双脉冲。晶体中存在纳秒光折变效应。     

环形自泵浦相位共轭振荡器

本文报道由环形自泵浦相位共轭振荡器(采用 KNSBN:Ce 晶体)所产生的相位共轭波和47%的自泵浦反射率以及在这一装置中还观测到利用晶体缺陷对光的散射作用使变弱的共轭波增强,衍射光环增亮.     

Nd:YAG激光在单晶硅中的四波混频相位共轭

以单晶硅作非线性介质,用调Q脉冲Nd:YAG激光作四渡混频,获得了相位共轭反射光波.从光激发电子-空穴对浓度及其所产生的相位光栅出发,理论计算了相位共轭镜的反射率.实验获得的共轭镜反射率为125%,并与实验中显示了其对相位干扰的补偿特性.     

受激布里渊散射相位共轭波的四波混频放大

本文介绍了一种产生相位共轭波的方法.此方法兼有四波混频方法和受激布里渊散射方法的优点,可得到转换效率大于1的高质量的相位共轭波.     

共振简并四波混频光学相位共轭的研究

本文考虑了非线性极化强度对cos(k·r)的依赖关系,对共振增强简并四波混频的半经典处理提出了修正,得到相位共轭反射率满足的Riccatti方程.使用可调谐连续波CO_2激光器和SF_6气体作非线性介质作了实验研究.获得了(0.2～0.8)×10~(-4)的反射率.     

应用诱导互泵浦位相共轭镜的实时图像处理

利用自泵浦诱导的互泵浦位相共轭镜，在１６°切掺铜钾钠铌酸锶钡晶体中，分别对信号图像的完整输出和边缘增强输出实现了两幅图像的实时相加和相减处理。位相共轭输出的成像分辨率高达５０ｐｌ／ｍｍ。     

Mutually Pumped Phase Conjugation of Three Incoherent Beams with a Novel Photorefractive Crystal

Ｍｕｔｕａｌｌｙ　Ｐｕｍｐｅｄ　Ｐｈａｓｅ　Ｃｏｎｊｕｇａｔｉｏｎ　ｏｆ　Ｔｈｒｅｅ　Ｉｎｃｏｈｅｒｅｎｔ　Ｂｅａｍｓ　ｗｉｔｈ　ａ　Ｎｏｖｅｌ　Ｐｈｏｔｏｒｅｆｒａｃｔｉｖｅ　ＣｒｙｓｔａｌＭｕｔｕａｌｌｙＰｕｍｐｅｄＰｈａｓｅＣｏｎｊｕｇａｔｉｏ...     

Mechanism for Phase Conjugation Reflections of Two Mutually Coherent Beams from Potassium Sodium Strontium Barium Niobate

ＭｅｃｈａｎｉｓｍｆｏｒＰｈａｓｅＣｏｎｊｕｇａｔｉｏｎＲｅｆｌｅｃｔｉｏｎｓｏｆＴｗｏＭｕｔｕａｌｌｙＣｏｈｅｒｅｎｔＢｅａｍｓｆｒｏｍＰｏｔａｓｓｉｕｍＳｏｄｉｕｍＳｔｒｏｎｔｉｕｍＢａｒｉｕｍＮｉｏｂａｔｅ￥ＺＨＡＮＧＬｉａｎｇｍｉｎ；ＺＨＡＮ...     

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...     

Multiple-beams Mutually Pumped Phase Conjugation Generated by a Bridge Phase Conjugator in Photorefractive Ba_(1-x) Sr_x TiO_3 Crystal

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ａｄｏｕｂｌｅ ｂｅａｍｓｍｕｔｕａｌｌｙｐｕｍｐｅｄｐｈａｓｅｃｏｎｊｕｇａｔｏｒｇｅｎｅｒａｔｅｓｔｈｅｐｈａｓｅ ｃｏｎｊｕｇａｔｅｒｅｐｌｉｃａｏｆｅａｃｈｏｆｔｗｏｉｎｃｉｄｅｎｔｏｐｔｉｃａｌｂｅａｍｓ[1～ 7] .Ｔｈｅｔｗｏｉｎｃｉｄｅｎｔｂｅａｍｓｎｅｅｄｎｏｔｂｅｃｏｈｅｒｅｎｔｗｉｔｈｅａｃｈｏｔｈｅｒ,ａｎｄｔｈｅｙｃａｎｅｖｅｎｂｅｆｒｏｍｄｉｆｆｅｒｅｎｔｌａｓｅｒｓｏｐｅｒａｔｉｎｇａｔｔｈｅｓａｍｅｎｏｍｉｎａｌｗａｖｅｌｅｎｇｔｈ .Ｍｕｔ…     

Multiple-beams Mutually Pumped Phase Conjugation Generated by a Bridge Phase Conjugator in Photorefractive Ba1-xSrxTi03 Crystal

A new method generating multiple-beams mutually pumped phase conjugation (MMPPC) in a photorefractive Bat- xSrxTiO3 crystal is demonstrated, in which a pumping beam is incident upon a-face of the crystal and two signal beams are introduced into + c face of the crystal with the almost same incident angle and position. The time evolution of the phase conjugations from signal beams and the dependence of phase-conjugate reflectivities on the input-beam intensity ratios are presented. Also, the amplitude coupled-wave equations based on the model of two interaction reigns is derived. The results obtained by numerical calculation of the corresponding coupled-wave equations show qualitative agreement with the experimental results.     

Coexistence of Self-pumped Phase Conjugation and Mutual-pumped Phase Conjugation in Ce:BaTiO3

Ｓｉｎｃｅｔｈｅｄｉｓｃｏｖｅｒｙｏｆｍｕｔｕａｌｐｕｍｐｅｄｐｈａｓｅｃｏｎｊｕｇａｔｉｏｎｉｎｐｈｏｔｏｒｅｆｒａｃｔｉｖｅｃｒｙｓｔａｌｓ,ａｎｕｍｂｅｒｏｆｄｉｆｆｅｒｅｎｔｔｙｐｅｓｏｆｍｕｔｕａｌｐｕｍｐｅｄｐｈａｓｅｃｏｎｊｕｇａｔｏｒｓｈａｖｅｂｅｅｎｆｏｕｎｄ,ｎａｍｅｌｙ,ｔｈｅｄｕａｌｐｈａｓｅｃｏｎｊｕｇａｔｅｍｉｒｒｏｒ(ＰＣＭ)[1],ｂｒｉｄｇｅＰＣＭ[2,3],ｉｎｃｏｈｅｒｅｎｔｂｅａｍｃｏｕｐｌｅｒ[4],ｂｉｒｄｗｉｎｇＰＣＭ[5],ｆｒｏｇｌｅｇＰＣＭ[6],ｆｉｓｈｈｅａｄＰＣＭ[…     

Coexistence of Self-pumped Phase Conjugation and Mutual-pumped Phase Conjugation in Ce∶BaTiO3

Self-pumped phase conjugation(SPPC) and mutual-pumped phase conjugation (MPPC) have been found to coexist in Ce∶BaTiO3 by using two coherent beams of 514.5nm wavelength from an argon ion laser. Both phase conjugations are of the stimulated backscattering and four-wave mixing type. For 7/6 incident power ratio and 26 mW total incident power,he shortest phase conjugate mirror formation time is 10s . Phase conjugate reflectivity of one the beams can reach 70%,hich is ～20% higher than the SPPC reflectivity using only one beam. When the total incident power is increased to 40 mW and the incident power ratio remains constant,a maximum phase conjugatate reflectivity of as much as 88% is obtained.     

High Efficiency Bridge Double PhaseConjugation in PhotorefractiveTb: Cu: KNSBN Crystal

1.IntroductionMutuallypumPedphaseconjugatemirrorsarenonlineardevicesthatsimultaneouslyproducephaseconjugatereplicasoftwomutuallyincoherentbeams.TheyattractedgreatattentionbecauseoftheirnumerousPotentialapplicationsinadaptiveoptics,opticalinfor-mationprocessing,laserlocking,optica1communication,opticalneuralnetwork,andsoon[l~s1.Variousschemesleadingtomutualphaseconjugationhavebeendemonstrated,includingdoub1ephaseconjugatemirror(DPCM)['J,mutua1lyincoherentbeamcou-pler[:J,birdwingphaseconjugat…