Two－Side Electron Beam Pumping System For Hundred－Joule－Level KrF Excimer Laser

Ｔｗｏ－ＳｉｄｅＥｌｅｃｔｒｏｎＢｅａｍＰｕｍｐｉｎｇＳｙｓｔｅｍＦｏｒＨｕｎｄｒｅｄ－Ｊｏｕｌｅ－ＬｅｖｅｌＫｒＦＥｘｃｉｍｅｒＬａｓｅｒ￥ＭＡＷｅｉｙｉ；ＳＨＡＮＹｕｓｈｅｎｇ；ＺＨＯＵＫｕｎｇｏｎｇ；ＷＡＮＧＹｏｕｔｉａｎ；ＺＨＡＮＧＤｏｎｇ；...     

Study of Nonlinear Optical Properties of Organic Material Utilizing Two－color Z－scan

ＳｔｕｄｙｏｆＮｏｎｌｉｎｅａｒＯｐｔｉｃａｌＰｒｏｐｅｒｔｉｅｓｏｆＯｒｇａｎｉｃＭａｔｅｒｉａｌＵｔｉｌｉｚｉｎｇＴｗｏ－ｃｏｌｏｒＺ－ｓｃａｎＹＡＮＧＭｉａｏ；ＹＩＮＺｕｘｉｎｇ；ＬＩＦｅｎｇ；ＳＯＮＧＹｉｎｇｌｉｎ；ＬＩＣｈｕｎｆｅｉ（Ｄｅｐ...     

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

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

AStudyoftheCis－TransIsomersofβ－Apo－12′－CarotenalbyResonanceRamanSpectroscopyatLowTemperature

ＡＳｔｕｄｙｏｆｔｈｅＣｉｓ－ＴｒａｎｓＩｓｏｍｅｒｓｏｆβ－Ａｐｏ－１２′－ＣａｒｏｔｅｎａｌｂｙＲｅｓｏｎａｎｃｅＲａｍａｎＳｐｅｃｔｒｏｓｃｏｐｙａｔＬｏｗＴｅｍｐｅｒａｔｕｒｅ￥ＹｉｎｇＨｕ；Ｔａｄａｓｈｉ；ＭｉｚｏｇｕｃｈｉａｎｄＹａｓｕｓ...     

HIGHLYCHARGEDATOMICPHYSICSATHIRFL－

ＨＩＧＨＬＹＣＨＡＲＧＥＤＡＴＯＭＩＣＰＨＹＳＩＣＳＡＴＨＩＲＦＬ－ＣＳＲＭａＸｉｎｗｅｎＷａｎｇＹｏｕｄｅＨｏｕＭｉｎｇｄｏｎｇＪｉｎＧｅｎｇｍｉｎＩｎｓｔｉｔｕｔｅｏｆＭｏｄｅｒｎＰｈｙｓｉｃｓ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｌａｎｚｈｏｕ７３...     

Vertical－cavity Surface－emitting Lasers Fabricated Twice by Implantation Using TungstenWireasMaskandZincDiffusion

Ｖｅｒｔｉｃａｌ－ｃａｖｉｔｙＳｕｒｆａｃｅ－ｅｍｉｔｔｉｎｇＬａｓｅｒｓＦａｂｒｉｃａｔｅｄＴｗｉｃｅｂｙＩｍｐｌａｎｔａｔｉｏｎＵｓｉｎｇＴｕｎｇｓｔｅｎＷｉｒｅａｓＭａｓｋａｎｄＺｉｎｃＤｉｆｆｕｓｉｏｎ￥ＪＩＡＮＧＸｉｕｙｉｎｇ；ＤＵＧｕｏｔ...     

Fabrication and Thickness Measurment of the Thin Films Deposited by Planar Magnetron Sputtering

ＦａｂｒｉｃａｔｉｏｎａｎｄＴｈｉｃｋｎｅｓｓＭｅａｓｕｒｍｅｎｔｏｆｔｈｅＴｈｉｎＦｉｌｍｓＤｅｐｏｓｉｔｅｄｂｙＰｌａｎａｒＭａｇｎｅｔｒｏｎＳｐｕｔｔｅｒｉｎｇ￥ＳＨＡＯＪｉａｎ－ｄａ；ＦＡＮＺｈｅｎｇ－ｘｉｕ；ＹＩＫｕｉ；ＹＩＮＧｏｎｇ－ｊｉ...     

Traveling－Wave Electrooptical Modulator on Polymeric Film with Reversal Poling Structure

Ｔｒａｖｅｌｉｎｇ－ＷａｖｅＥｌｅｃｔｒｏｏｐｔｉｃａｌＭｏｄｕｌａｔｏｒｏｎＰｏｌｙｍｅｒｉｃＦｉｌｍｗｉｔｈＲｅｖｅｒｓａｌＰｏｌｉｎｇＳｔｒｕｃｔｕｒｅ￥ＺＨＯＵＹｉ；ＣＨＥＮＹｉｘｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＰｈｙｓｉｃｓ，Ｓ...     

Single－Mode CW 532nm Output of 1．3W by Internal Frequency Doubling with Ti：MgO：LiNbO_3

Ｓｉｎｇｌｅ－ＭｏｄｅＣＷ５３２ｎｍＯｕｔｐｕｔｏｆ１．３ＷｂｙＩｎｔｅｒｎａｌＦｒｅｑｕｅｎｃｙＤｏｕｂｌｉｎｇｗｉｔｈＴｉ：ＭｇＯ：ＬｉＮｂＯ_３￥ＬＩＪｉａｎ；ＷＵＬｉｎｇ－Ａｎ（ＩｎｓｔｉｔｕｔｅｏｆＰｈｙｓｉｃｓ，ＡｃａｄｅｍｉａＳｉｎｉｃ?..     

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

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

2 TPa压力下2169钢的冲击压缩测量

 利用地下爆炸产生的冲击波进行2169钢冲击压缩测量。测量是根据阻抗匹配解方法并且以铁作为标准材料。布置47根接触电探针以确定2169钢和标准材料中的冲击波速度以及冲击波阵面形状。测量出的2169钢冲击压缩参数是：冲击波速度u_s=22.12 km/s，波后粒子速度u_p=13.39 km/s，冲击波压力p=2.31 TPa和压缩比σ=2.53。本测量结果与较低压力下化爆测量结果的外推值的比较表明，两者基本一致。     

Low pump power co-fiber remotely pumped EDFA used in DWDM systems with ultra-long fiber span

In this paper, aiming at practical dense wavelength division multiplexing (DWDM) system with ultralong fiber span, a simple co-fiber remotely pumped erbium-doped fiber amplifier (RP-EDFA) scheme is proposed to extend span distance with simple configuration and low pump power. Equivalent noise figure of -6 dB is achieved under 300-mW pump power. Using the experiment results, numerical simulation of ultra-long span systems shows that for a 40 × 11.6-Gb/s transmission system, the RP-EDFA scheme can support transmission of 1760 km with a fiber span of 160 km. These results demonstrate the potential of the PR-EDFA scheme in ultra-long span transmission.     

混合干涉型分布式光纤传感器PGC信号解调设计与实验分析

对一种基于马赫-曾德尔和萨格纳克混合干涉仪原理的分布式光纤泄漏检测系统调制解调技术进行研究,对PGC解调技术进行理论分析。针对所选泄漏分布式光纤传感特点设计了PGC解调硬件电路,并对PGC解调电路进行了测试。实验中待测信号为0~50 kHz,载波频率为300 kHz,截止频率为50 kHz, 移相后与待测信号的相关系数达到0.95,谐波失真小于3%,泄漏源位置为7.865 km,泄漏检测定位系统绝对定位误差为235 m,相对定位误差为2.35%。本解调定位系统具有稳定性和抗干扰性。     

红外告警系统三站被动测距目标确认及精度分析

介绍了基于红外告警系统的被动测距原理,探讨了影响被动测距的误差来源,在此基础上给出了目标同一性的判定条件,结合作战使用分析了三站红外被动测距系统的目标测距精度。结果表明,2 km的站点布阵可以保证对22 km范围内的目标测距精度优于8%,对40 km范围内的目标测距精度优于15%,可实现对目标全方位、远距离、高精度被动测距。     

城市路径下激光光强起伏特性测量及链路余量估算

 在城市环境下进行了3.5 km的激光大气传输实验。实验中对光强起伏和到达角起伏进行了同步测量，分析了接收光强起伏的统计特性以及传输路径上大气折射率结构常数的特性。基于实验结果，对自由空间光通信中不同闪烁指数下的衰落冗余以及不同探测阈值下的衰落概率进行了估算，从而为空间光通信系统的设计提供可靠的实验基础。     

Field Trial of 40 Gbit/s ETDM Prototype System over 219 km of Installed Single Mode Fiber

Transmission of 40Gbit/s NRZ signal was successfully demonstrated over 219km of installed SMF in KT's Daejeon area network. After transmission, the measured power penalty was 0.5dB for all the tributary channels.     

Lidar observations of wind over Xin Jiang,China: general characteristics and variation

The mobile Rayleigh Doppler lidar based on a Fabry–Perot etalon is developed for wind measurement. The structure and technical parameters of this lidar system are described in brief. The 1740 wind profiles from 8 to 40 km altitudes by the lidar in Xinjiang, China, were obtained in 2010 and 2011, and were used to analyze the characteristics and variations of wind. The results shown that the wind velocity is within a three-layer structure: westerly jet layer (9–14 km), quasi-zero velocity layer (18–22 km) and gale layer (22–40 km). In August and September, the wind direction is within a three-layer structure: zonal westerly wind layer (5–18 km) where wind direction is west, zonal wind reverse layer (18–22 km) where wind direction is unstable and easterly wind layer (22–40 km) where wind direction is east. In October, wind direction is west (8–40 km). Wind observations by lidar are a realistic offset to the rawins.     

光电着舰引导设备激光单元作用距离研究

阐述了光电着舰引导激光测距/跟踪单元的工作原理,从人眼安全和大气窗口两方面讨论并确定了激光发射机波段。通过经验公式计算及MODTRAN实验对比研究了1.5x m全光纤激光的大气透过率。在精确计算大气双程透过率的基础上,分析了激光测距/跟踪单元不同气象条件下的作用距离。在晴与霾两种气象条件下,所设计的激光单元最大作用距离分别为10.8 km和8.5 km,满足光电着舰引导系统对跟踪距离大于6 km的指标要求。     

A multi-channel full-duplex 60-GHz-band radio-over-fiber system

We propose and simulate a novel full-duplex radio-over-fiber system using a single light source at central station (CS). The scheme is employed to generate 60-GHz optical millimeter wave at CS for down-link transmission while the same optical carrier is reused at base station for up-link connection. There is no additional laser source for the upstream data generation in the base station. The bidirectional full-duplex 2.5 Gb/s data are successfully transmitted over 40 km standard single-mode fiber (SMF). The power penalty for the down-link data after transmission over 40 km SMF is less than 0.6 dB, while for the up-link data, the power penalty after transmission over 40 km SMF is neglected. This system shows good performance over long-distance delivery and has important applicable value in high radio frequency (RF) sector and multi-channel full-duplex system.     

Measurement of scintillation and link margin for laser beam propagation on 3.5-km urbanised path

An experiment of laser propagation was carried out at the urban terrain range of 3.5 km during the period of March to May of 2006. The received intensity scintillations and atmosphere turbulence strength in complex urban atmosphere circumstance were simultaneously measured concentratively. The results show the statistical characteristics of irradiance scintillation and atmosphere turbulence strength and link fade margin for urban free-space optical links.