氯化亚铜铜蒸汽激光器

本文报导了阐流管的触发电路经过改进之后所获得的CuCl蒸汽激光器的实验研究结果。获得最大平均输出功率为1.5W。     

使用磁压缩的小型N_2激光器

使用磁压缩的小型Ｎ_２激光器近年来Ｎ２激光器研制领域的研究表明，使用低气压毛细管盒作为激活元件可达到很高的脉冲振荡重复频率（数千赫）’‘’。数千赫重复频率的氮激光器所必须的激发电流脉冲的能量和时间特性目前只能用间流管建立，即使间流管也不能保证小于２０?..     

不同型号闸流管对CuBr激光功率的影响

铜蒸气激光器是目前可见光中输出功率最强、效率最高的气体激光器，百CuBr激光器相对于纯铜激光器具有工作温度较低（450～550C）；启动快，结构简单，使用方便等优点，输出较强的黄、绿激光而被广泛应用在激光娱乐、激光光谱、激光医学和激光法分离同位素铀等方面，目前，国际上典型器件的CuBr激光输出功率为6W，为提高其平均输出功率，人们尝试了多种行之有效的方法，在缓冲气体氛中加入少量氢气可提高功率到12W，采用轴向温控装置可使输出功率倍增．CuBr激光器通常采用谐振倍压充电通过闸流管放电的电路激励，其中问流管的型号和质量…     

串联式可调恒流管驱动激光器的设计与测试

为了保护激光器工作并省去相应复杂的高速保护电路,设计了同步可调恒流管串联式激光器恒流源。采用模拟电路的方案实现两恒流管同步调整,使在整个调整范围内,不仅都能保持在恒流区域工作,而且其输出电流基本相等;激光器在400mA工作时由任一晶体管瞬时损坏引起的电流增大只有15mA。结果表明,用同步可调恒流管串联式电路制作的激光器恒流源具有很好的恒流特性和保护性能。     

腔内倍频Nd：YAG／KTP高功率绿激光器

印度原子能研究所固体激光器研究部在高功率绿激光器领域获得了新突破，研制成功了最高功率为30．5W的连续输出绿激光器，输出波长为532nm，光一光转换效率为11．7％，电一光转换效率为4．7％，是目前世界上二极管侧面泵浦倍频Nd：YAG绿光输出激光器的最高水平。     

多路氙灯触发的研究

在单棒多灯泵浦或多级放大的固体激光电源中,通常一支氙灯单独设置一套触发系统,显然,仅触发系统在电源中所占的比例是相当可观的。我们研制了一套自动氙灯内触发系统,它至少可以同时触发六支氙灯,具有开机延时触发和灭火自动再触发功能。可适用于各种高重复率激光器。但不适于那些不予燃、依靠触发氙灯放电的激光器、如一些红宝石、钕玻璃激光器。     

双端抽运的30 W光纤激光器实验研究

报道了双端抽运连续输出的掺Yb^3 双包层高功率光纤激光器。实验采用了中心波长在975nm附近的两种输出形式的半导体激光器(LD)作为抽运源，测量了不同抽运条件下的输出功率特性和光谱特性。在仅尾纤输出的半导体激光器抽运下获得了斜率效率为42％，峰值波长为1103．8nm的9．2W激光输出；在仅准直输出的半导体激光器抽运下获得了斜率效率为57％，峰值波长为1104．4nm的20．0W激光输出；当两个半导体激光器在双端同时抽运时，获得光纤激光最大输出功率为30．6W，输出峰值波长为1108．4nm，以及49％的总体光一光转换效率。     

微脉冲激光雷达A/D卡同步触发的设计与实现

在微脉冲激光雷达对能见度的测量系统中，常采用光子计数和模／数(A／D)转换两种处理方法进行对比测量，但微脉冲激光器没有Q开关，不能输出与激光脉冲同步的信号，来触发A／D卡采集大气会波信号．本文以高频管和高速单稳触发电路解决了该问题，使整形后的TTL信号的触发沿(上升沿)与激光脉冲的延时相盖50ns，可将测量系统的盲区控制在10m以内．     

一种紫外予电离横向激励高气压脉冲CO_2激光器

本文报导双触发丝型紫外予电离横向激励高气压脉冲CO_2激光器的研制结果。对影响激光器输出能量的诸参量进行了实验研究,最终达到的单脉冲能量大于20焦耳,单位激活体积的输出能量密度为25焦耳/升,效率约17％。     

反射式红外激光触发装置失稳现象分析与研究

针对红外触发装置在经过长时间工作之后出现失稳现象，在分析红外触发装置工作原理的基础上，通过实验监测和分析手段得出如下结论：红外触发装置经长时间工作后，因温度累积导致温度上升，引起红外激光触发装置的光源——红外激光器阈值电流Ith(T)上升，而温度升高同时引起激光光源驱动恒流源输出电流Iout(T)降低，当Iout(T) Ith(T)，红外激光器始终处于稳定发光状态，从而使红外触发装置也处于稳定工作状态。经过长时间的上电运行验证实验，红外触发器工作稳定，未发生误触发信号，较好解决了其失稳问题。此研究对提高红外触发装置的稳定性有重要的工程应用价值。     

100-kV Hydrogen thyratron without gradient grids

A high-power hydrogen thyratron grid-anode structure has been developed using a 5949 thyratron cathode assembly. One such device was operated for 10 h at 2000 A, 32 kV, at 1400 pps with a pulse width of 0.3 µs. Another was operated for periods up to 220 h at 1000 A, 100 kV, at a duty cycle of 0.00004. The duty cycle is presently limited by our test modulator circuit. Trigger requirements are 2 kV at 50 Ω with a 2.5-µs duration. The jitter was nil when measured with a Tektronix 517 oscilloscope using a sweep speed of 50 ns/cm. The anode delay time is in the range of 1/4 to 1/2/ µs. The grid-anode geometry is designed for a minimum anode-grid capacity, thus providing a tube with a higher repetition rate capability. The field emission limit up to 100 kV is not evident in the normal sense in this geometry.     

Compact megawatt average power burst pulse generator

A compact, lightweight, burst mode pulse generator has been designed and evaluated at a megawatt of average power. The modulator occupies a volume of 0.81 m³and weighs 225 kg. The recently developed MAPS-40 thyratron [1] and two high-energy density pulse-forming networks [2] (PFN) are used as the switch and energy store. A solid-state end-of-line clipper circuit is included and was found to be essential at high average power loadings. The modulator has been evaluated using a copper sulphate load at 40-kV peak voltage, 40-kA peak current, 10-µs pulsewidth, 40-kA/µs rise time,and 50 A of average current at a repetition rate of 125 Hz. Repeated burst on times of 5 s in a 35-s time period have been demonstrated.     

铜蒸气激光链中激光脉冲的抖动分析

运用概率论方法导出了铜蒸气激光链中激光脉冲抖动量的表达式,结果表明:当铜蒸气激光器并联时,两台激光器输出光脉冲之间的抖动量的平方等于每台激光器输出光脉冲相对于电触发脉冲抖动量的平方和;当多台铜蒸气激光器串联放大时,第m台激光器输出光脉冲相对于振荡器输出光脉冲的抖动量随m的增加而增加,但总是小于每台激光器放电脉冲抖动量的2~(1/2)百倍。实验结果与理论计算基本相符。     

A high-voltage modulator for high-power RF source research

The design, construction, and operating results of a high-voltage modulator system capable of generating 700-kV, 2.5-μs pulses at 5 p.p.s. into a load of 900 Ω are presented. The modular is used to energize a variety of high power microwave devices requiring voltage stability and reproducibility. Voltage ripple is less than 0.2% during the 1.0-μs flat top, with a shot-to-shot voltage variation of less than 0.1%. The primary circuit consists of two seven-stage tunable Rayleigh-type pulse-forming networks (PFNs) connected in parallel with a total impedance of 2.25 Ω, a total capacitance of 0.56 μF, and a total inductance of 2.8 μH. The PFN is charged by a highly stable 80-kV capacitor charging power supply (0.1% RMS voltage ripple) at a rate of 10 KJ/s. The total energy stored (1.5 kJ) is released through an ITT F-187 thyratron into a 20:1 pulse transformer, which generates 700-kV, 2.5-μs pulses. By changing the transformer, it was possible to obtain 250-kV, 1.70-kA pulses for driving low-impedance relativistic magnetron diodes. The flat-top voltage generated by the modulator is highly desirable for driving RF sources requiring high-quality electron beams, such as free-electron lasers (FELs) and cyclotron autoresonance masers (CARMs). The modulator performance in the relativistic magnetron and CARM experiments is described     

氢闸流管触发的紫外氮分子激光器

报道一种紫外氮分子激光器,采用国产氢闸流管作触发器,同位素作预电离源。激光脉冲能量最大值为5mJ,延时抖动为±1ns,单脉冲激光能量稳定度为5％。     

ROGOWSKI线圈在磁脉冲压缩准分子激光器中的应用

介绍了磁脉冲压缩器在准分子激光器中的基本工作原理、磁性材料的计算公式和磁脉冲压缩器的参数结构设计,给出了使用了磁脉冲压缩器的准分子激光器的放电过程,并且使用自制的ROGOWSKI线圈测量了不同放电电压时的实际放电过程中的闸流管的脉冲电流波形,还测量了不同放电回路电感Lo时的通过闸流管的脉冲电流波形和激光输出能量。在此次实验中,通过分析所得到的放电波形,磁脉冲压缩器的作用得到了证实,测量结果与原理有着很好的一致性。本实验为放电回路的优化设计提供了有效的依据。     

精密长延迟纳秒高压脉冲源

介绍一种为大电流开关点火的精密长延迟纳秒高压脉冲源的研制。采取低压固体电路与大小氢闸管电路的合理配置，较好地解决了精密长延迟和高压脉冲输出时低延迟时间晃动的难点。该源具有延迟时间晃动小和可调的精密长时间延迟、上升时间小和幅度大的脉冲输出、抗强脉冲干扰等特性。     

Life extension of thyratrons in short-pulse circuits with use ofsaturable magnetic sharpeners

The design of magnetic pulse sharpening circuits for thyratron switching applications is presented. It is useful to add a saturating magnetic switch in series with the tube. Addition of the magnetic device reduces anode dissipation, hence reducing thyratron cooling requirements. The saturating magnetic switch allows the anode voltage to collapse while delaying the forward current, thus reducing the electron energy to a level below that which results in erosion. The complex interrelated issues of material selection, electrical parameters, core reset, and mechanical engineering are considered for the development of an integrated point design. Test results are presented, and life extension to >10¹⁰ shots is discussed     

磁脉冲开关在准分子激光器中的应用

本文介绍了用于准分子激光器中的磁脉冲压缩开关的原理和结构，分析了磁脉冲压缩开关在激光器激励电路中的工作过程，并且给出了实验结果。实验表明，磁脉冲庄缩开关有效地压缩电流脉冲宽度，对激励电路中的闸流管起到保护作用。     

脉冲锁模单脉冲选出同步电路

用国产雪崩管串驱动四电极触发管的高压开关从简易脉冲双锁模激光器中选出了稳定的亚毫微秒激光脉冲． 本文介绍了高压开关及同步电路的制作及实验情况。