Ultra-short and ultra-intense pulsed lasers(femtosecond lasers)possess extremely high peak power,and hold broad application prospects in laser inertial confinement fusion,high-energy physics,laser micro-processing and other fields.The peak power of femtosecond pulsed lasers is a crucial parameter for evaluating the performance of ultra-short and ultra-intense pulsed laser systems.A peak power measurement method of terawatt-level femtosecond pulsed laser based on the spectral phase coherent direct electric field reconstruction was introduced,along with the composition and working principles of the measurement device.A set of peak power measurement device of terawatt-level femtosecond pulsed laser was constructed,and the sources as well as main factors of measurement uncertainty influencing the measurement results of peak power were analyzed and discussed.The repeatability of the peak power measurement is 2.9%,and the measurement uncertainty reaches 17.6%(k=2),which effectively addresses the issue of peak power measurement of terawatt-level femtosecond laser.

损伤阈值测量装置是强激光技术的重要技术指标，主要用于强激光光学元件的研制和测试，而同步触发模块作为模块之间时序的控制器，是研制损伤阈值测量装置的关键技术之一。介绍了一种用于激光损伤阈值测量装置的同步触发模块及方法。设计了基于现场可编程门阵列（field programmable gate array，FPGA）为主控芯片的硬件方案，通过上位机操控软件设置同步触发参数，来控制各路输出同步信号的宽度和各路信号之间的时序，可极大提高同步触发的精度和效率。通过实验验证，同步脉冲信号之间的调节精度为2 ns，同步脉冲信号的最小宽度为10 ns，满足激光损伤阈值测量装置的要求。

In order to improve the target localization accuracy for unmanned aerial vehicle(UAV), a novel resolved case for target accurately localization is proposed using slave-INS which is fixed on electro-optical reconnaissance system. The work flow of this case is presented, the coordinate transformation relation in target localization process is deduced. According to requirement, a slave-INS alignment on moving base using master INS data is designed. Carry out experiment upon vehicular navigation system, the error convergence of azimuth accelerated obviously. The accuracy of azimuth reaches about 0.1°(1 σ). Experiment results show that the localization accuracy for ground target can reach 6m when UAV flies at about 3500m above ground and slant distance is 3700m. the INS has convenience and flexible use which meet to requirement of target localization in electro-optical reconnaissance system on UAV. The accuracy of localization can be increased prominently when this INS is applied to target localization technology. With great practical value.

钛宝石飞秒激光放大系统具有重复频率低、脉冲波形复杂等特点,为准确测量其峰值功率,提出对单次脉冲波形和脉冲宽度测量的需求。介绍了单脉冲飞秒激光时域波形和脉冲宽度的测量原理和测量方法,设计了基于频率分辨光学开关法的单脉冲飞秒激光时域参数测量装置。讨论了单脉冲飞秒激光时域参数测量校准面临的问题及解决方法。

飞秒激光在激光核聚变、卫星精密测距、激光微加工等领域具有重要的应用前景,同时也是产生太赫兹波的主要泵浦源.介绍了国内外飞秒激光脉冲宽度和脉冲波形的测试方法,比较了自相关法、频率分辨光学快门法、光谱相位相干直接电场重构法的优缺点.自相关法具有脉宽测量范围广、结构简单等特点,但不具备脉冲波形测试能力.光谱相位相干直接电场重构法对待测激光光束质量要求较高,不适合大量程范围激光脉宽快速测量.为满足10 f s～5 ps大量程范围超短激光脉冲宽度和脉冲波形的测试需求,采用自相关法及二次谐波频率分辨光学开关法研制飞秒激光脉冲宽度和脉冲波形测试仪,时间分辨率优于2 fs.

The LOS drift caused by the earth’s rotation is a knotty problem to the tank fire control system. A LOS drift suppression method based on inertial system parameters is proposed. By virtue of the vehicle inertial system,geographic coordinates and attitude information of aiming mirror are obtained,and the earth rate components respect to the stabilized aiming mirror frame is calculated. A stabilized control system is used to control two directional channels by adding the respective compensations and then the influence of earth rotation is counteracted. As a result,in view of the observer,LOS is still following the goal and not need operator to manually fine-tune it. This method is not only suitable for tank combat training system,but also can be used in stabilized sighting device of shipboard or airborne system.

A multi-function system based on inertial measurement unit(IMU) is introduced, which can fulfill navigation, attitude measurement of LOS in payload, platform stabilization and tracking control. The IMU is integrated with electro-optical sensors and a laser range finder on gimbals, which performs attitude calculation and navigation by constructing navigation coordinates in a mathematic platform, and the platform navigation information is obtained by transformation matrix between platform and gimbal coordinates. The platform comprising of gyros, electro-optical sensors and servo mechanism is capable of stabilizing line of sight and could be used to geo-tracking in the relevant field of view (FOV). The system can determine geography coordinates of the host platform and target only with navigation information and laser ranging data. The geo-tracking system always locked the target image at the center of FOV by calculating spatial geometry and adjusting LOS attitude. This tracking is different from TV tracking and geographical reference image tracking, which may be influenced by fog and obscurant. When the UAV is flying over urban or mountain areas for rescue missions, it can avoid the loss of targets due to strong maneuver or LOS obscuration, and reduce the operation load and improve rescue efficiency.

Strap-down INS is composed of fiber gyroscope. Position error propagation equation and position update algorithm of dead reckoning is deduced in this paper. The Kalman filter is proposed for compensation error of integrated system. The difference of velocity between INS and DR is used as the input of Kalman filter, attitude error, velocity error, position error and scale factor error are to be estimated which compensate and rectify the errors of integrated navigation system. By carrying out experiment upon vehicular navigation system in use of Kalman filter, the errors of integrated navigation system are estimated accurately. Experiment result show that the method not only can effectively improve precision of the system, but also is simple and convenient, so it is more suitable for practical application.

Advantages and disadvantages of several digital handle controller were discussed in this article . Considering pratical demand of one digital servo control system , a new-style digital handle controller with the communication of CAN-bus was de-signed . Basing the principle of angle rate integral , the hardware structure and software flow chart is persented in this paper . E-valuating after testing through the practice atempt and effect , this handle controller not only outputs discretionary angle-position , but also generates consecutively changing angle-rate of track . It has more flexibility and stability , and advantages of simple struc-ture , low cast and high reliability . There are potential application in digital servo control area such as radar track and monitoring around vision .

A target tracking system based on inertial stabilized platform（ISP）is introduced, which can fulfill platform inertial navigation, platform stabilization and target tracking. An IMU is integrated with electro-optical sensors and a laser range finder on a gimbal, which performs attitude transformation by constructing navigation coordinates in a mathematic platform, and the platform inertial information is obtained by transformation matrix between platform and payload coordinates. The inertial platform comprising gyros, electro-optical sensors and servo mechanism is capable of stabilizing line of sight and can be used to track targets in the relevant field of view (FOV). The system can determine geography coordinates of the host platform and target only with inertial information and laser ranging data. The geo-tracking system always locked the target image at the center of FOV by calculating spatial geometry and adjusting LOS attitude. This tracking is different from TV tracking and geo-reference image tracking, which may be influenced by fog and obscurant. When the helicopter is flying over urban or mountain areas for rescue missions, it can avoid the loss of targets due to strong maneuver or LOS obscuration, and reduce the operation load of the aircrew and improve rescue efficiency.