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ZHANG Yufei DENG Daoqun ZHANG Xiulan FENG Baohua ZHANG Dongxiang LIU Xiang WU Qiong XU Zuyan 《Chinese Journal of Lasers》1996,5(3):193-198
A Narrow Bandwidth BBO Optical Parametric Oscillator Injection-seeded by a Tunable Pulsed Ti:Sapphire LaserANarrowBandwidthBB... 相似文献
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背景辐射与光子平衡态 总被引:2,自引:0,他引:2
背景辐射与光子平衡态张邦固(科学出版社北京100717)BackgroundRadiationandPhotonEquilibriumStateZhangBanggu(SciencePres,Beijing100717)AbstractTheBac... 相似文献
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Integrated Optical Parallel Logic Processor Based on Birefringent Array IlluminatorIntegratedOpticalParallelLogicProcessorBas... 相似文献
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Dispersion Compensators Based on Overlaped Linearly Chirped Fiber Gratings for DWDM Systems 总被引:1,自引:0,他引:1
1 Introduction ThereisagreatdealofinterestinfiberBragggratingsduetotheirmanyimportantapplicationsinthefieldoftelecommunicationsandfibersensors .BecausefiberBragggratingsexhibitdispersionbothinreflection ,especiallywhenthe gratingischirped[1] ,andintransm… 相似文献
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JU Youlun LIU Qiang YAO Baoquan YU Xin DU Xiaojun WANG Qi 《Chinese Journal of Lasers》1999,8(4):303-306
Becausetheopticalparametricoscillator(OPO)canbegeneratethetunablelaseroutput,itplaysanimportantroleinlasertechnology[1~5].ItiswellknownthattheefficiencyofOPOdependsonthequalityofthepumpinglaserbeam.ThestimulatedBrillouinscattering(SBS)isanimportantto… 相似文献
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ZHENG Ruihua CHENG Deying ZAO Xiaoyan LU Zhiwei MA Zuguang 《Chinese Journal of Lasers》2001,10(1):51-56
1 Introduction Laser inducedcollisionenergytransfer(LICET)isanopticalphenomenoninvolvingthesimultaneousinteractionsofboththelaserfieldandcollision[1~ 3 ] .ThisLICETreactioncanbewrittenas:A B hΩ →A B (1)Duringthecollisionofatom Awithatom B ,atomAgoesbacktogr… 相似文献
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1IntroductionFiberBragggratings(FBGs)haveatractedmuchatentioninrecentyears[1~3]becauseoftheiractualandpotentialimportantappli... 相似文献
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天然脱氧核糖核酸分子中碱基价键的振动变化余多慰,柯惟中(南京师范大学南京210097)RamanCharacteristicAnalysesofTheTwoCovalneceBondsbyTheBaseSldeofGlycosidlcBondinDN... 相似文献
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ZHANG Weigang { } FENG Dejun DING Lei KAI Guiyun DONG Xiaoyi YAO Chunde {} Institute of Modern Optics Nankai University Tianjin China {} Gungxi University of Technology Liuzhou China {} National E 《Chinese Journal of Lasers》2001,10(3):174-178
1 Introduction ThefiberBragggrating (FBG) ,asanewpassivesourceelement,hasmanyimportantadvantagessuchasvolumeminuteness ,compatibilitywithfibersystem ,collectionfrequencyforwavelengthandsoforth .Thus ,FBGisplayinganimportantroleinthefibergratingsensingtechn… 相似文献
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High efficiency redundant binary number representations for parallel arithmetic on optical computers
A family of redundant binary number representations, obtained by generalization of the RB (redundant binary) number representation, is introduced. All these number representations are suitable for optical computing and have properties similar to the RB representation. In particular, the p-RB (packed redundant binary) number representation introduced in this work has efficiency greater than both RB and MSD (modified signed digit) representations. With p-RB numbers the algebraic sum is always permitted in constant time for any efficiency value. p-RB representations also fit in a natural way the 2's complement binary number system. Symbolic substitution truth tables for the algebraic sum and several examples of computation are also given. 相似文献
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冗余二进制法适合数字光学混合计算机.利用该法可以在常数时间内实现无进位的并行算数和,并建立内在的并行算数单元.本文在分析该方法的基础上,利用布尔偏振编码逻辑代数设计了高效光学冗余二进制加法操作系统. 相似文献
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A single-step optoelectronics symbolic substitution scheme to handle parallel modified signed-digit (MSD) arithmetic operations is proposed. Conversion algorithms from MSD numbers into a canonical MSD representation are provided. The canonical MSD numbers have the property that no two consecutive digits are non-zero. The addition operation of two CMSD numbers is performed in one step. It will be shown that through the use of CMSD representation, the number of symbolic substitution rules in an optical content-addressable memory (CAM) based system is significantly reduced. The number of symbolic substitution rules can be further reduced to an optimum value through a proposed shared content-addressable memory optical set-up. Further, the proposed optical scheme doubles the storage efficiency of the shared content-addressable memory. 相似文献
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提出了用联合变换相关器(JTC)来实现证据理论概率分配函数正交和的光学计算,在理论上对于如何用联合变像相关器实现证据理论分配函数正交和作了详细的讨论,并作了相应的仿真测试,结果显示该方法是可行的。与John Caulfield提出的用声光器件矢量外积实现的正交和计算相比,在该结构中由于采用二进制编码的数值计算,因此其计算精度得到了提高,同时对联合变换相关器输入端二进制编码的数值空间位置的适当调整可以直接得到所需要的证据理论正交和矢量,在处理步骤上得到了简化。 相似文献
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放大率恒定的二元光学超光谱成像仪光学系统设计 总被引:3,自引:0,他引:3
二元光学元件具有多种应用。用作透镜,在原理上色差非常大,若不在设计上做出补偿,则会限制其在宽波段上的使用。从理论上简单阐述了利用具有独特色散特性的二元光学元件的新型超光谱成像仪的基本原理和应用前景。在此超光谱成像仪中,二元光学透镜焦距随波长的变化改变了系统的F数,因此改变了系统的放大率,既系统放大率是波长的函数,这将引起光谱图像的像元配准误差,得到并不精确的相对光谱信号强度,从而限制了光谱图像重建算法的精度,为了补偿这一缺点,通过光学二组元法设计的变焦系统成功地解决了这一问题,并给出了理论设计公式。 相似文献