A copper HyBrID laser with 2 W/cm3 specific averageoutput power

A copper HyBrID laser (λ510.6, 578.2 nm) is reported, which produced an average output power of 9.5 W from an active volume of just 4.77 cm³. These figures correspond to a record specific average output power for copper lasers of any type of 2.0 W/cm³      

A 200 W average power, narrow bandwidth, tunable waveguide dye laser

A planar waveguide dye laser, driven by commercial xenon flashlamps with an average power output of 200 W at 50 pulse per second (pps) is described. Due to the planar structure, a narrow bandwidth operation down to 10 GHz has been obtained with a single grating arranged at grazing incidence. With this configuration, high overall efficiency up to 0.6 percent has been obtained, partially due to energy conversion of the broad-band emission spectrum of the flash-lamps by circulating an appropriate dye solution between flashlamps and reflectors.     

输出平均功率达200W的板状激光器

脉冲运转的“之”字形Nd:YAG板状激光器,在工作频率为50pps时,最高输出激光平均功率达230W。由于采用了“之”字形光路,使热畸变得到补偿,输出激光束的发散角得到改善,一般为3×4mrad。     

A highly stable 30 W average power mode-locked Nd:YAG laser

Mode locking of a CW pumped Nd:YAG laser operating in the TEM01or donut mode using an intracavity acoustooptic AM modulator is described. Mode-locking investigations to date have concentrated on obtaining as short pulses as possible at the expense of average and peak laser output power. We describe a mode-locked system for field use having an average output of 30 W, with pulses recurring at a 100 MHz rate and having a peak power in excess of 0.5 kW. Detector limited pulses of 0.6 ns duration were recorded and the mode locking was stable for several hours requiring no feedback loop or fine adjustment.     

A reliable high average power dye laser

A pulsed dye laser using commercial xenon flashlamps in a novel pump geometry and using thyristors for switching having an average laser output power capability of 100 W is described.     

A CuBr laser with 1.4 W/cm3 average output power

An average laser power of 6.7 W has been obtained from a small-bore CuBr laser with a constructive active volume of 4.77 cm³ , i.e., a record specific average power of 1.4 W/cm³ for multikilohertz operation of copper vapor lasers has been achieved. It was found that the small-bore CuBr laser can operate with a neon buffer at atmospheric pressures     

A 280-W average power Cu-Ne-HBr laser amplifier

A large-volume (19.5 L) laser tube has been built for the study of extrapolating power from the Cu-Ne-HBr laser medium. A high-power (50 kW) all-solid-state power supply has been also developed for this purpose. Results show a record optical power of 216 W extracted from this type of laser when used as an oscillator and 280 W as an amplifier     

200 W KrF gas transport laser

This paper describes the design and operation of a closed cycle, gas transport, krypton fluoride laser which has generated an average output power of over 200 W while operating at a pulse repetition rate of 1 kHz.     

A large volume copper vapor +HCI--H/sub 2/ laser with a high average power

A copper vapor laser tube with a large volume (15.1 L) has been built for the study of extrapolation in power of the Cu-Ne-HCl-H/sub 2/ laser medium. A high-power (77 kW) all-solid-state high-voltage power supply has been also used for this purpose. Results show an improvement of the optical power after the HCl-H/sub 2/ mixture injection. An optical power of 312 W has been extracted from this laser head in oscillator configuration.     

Nd-glass burst laser with kW average power output

Demonstrations of operation of a compact neodymium glass laser with average output powers greater than 1 kW for several seconds are reported. The laser is based on the thermal inertia laser (TIL) concept wherein a neodymium-doped glass rod is pumped uniformly without cooling during a burst mode of laser operation. Design principles for TIL devices and scaling to 100 kW class lasers are discussed. Experimental results for a low repetition-rate proof-of-concept pulsed device (30 J, 0.2 Hz) and a high repetition-rate pulsed prototype (40 J, 36 Hz) are presented and compared to numerical solutions for the laser rate equations with temperature dependent cross-sections     

高平均功率电能激光器研究进展

高平均功率电能激光器在工业加工和定向能量传输、国防军事、激光钻油井等领域具有重要的应用前景.而且有效率高、结构紧凑灵活、热管理方便、后勤保障容易等优点.广泛关注了近几年来国外高平均功率电能激光器的研究进展,包括固体激光器、光纤激光器、液体激光器、自由电子激光器、碱金属蒸汽激光器、二氧化碳激光器及基于固体和光纤、半导体激光器的相干合成、非相干合成、光谱合成.在介绍了各种激光器工作原理和关键技术的基础上,详细分析了高平均功率电能激光器面临的技术挑战及未来的发展趋势.     

20W放电自加热式铜蒸气激光器

本文报道了平均输出功率为21.5W、效率为0.5％的铜蒸气激光器。测量和分析了该器件的发光性能。     

A proposed 1 kW average power moving slab Nd:Glass laser

The design considerations of a high average power Nd : glass slab laser in which the slab moves between the pumping lamps to distribute the thermal loading over the area of the glass while maintaining high gain in the pumped volume are presented. Continuous wave operation and high repetition rate pulsed operation are projected at the 1kW average power level.     

A high average power dual slab Nd:glass zigzag laser system

A dual slab Nd:LHG5 glass zigzag optical path laser was constructed with single-sided pumping and tested. A single slab (0.63 times 5.6 times 35cm) produced 80 W in an oscillator with an accompanying distortion of only 3 fringes (632.8 nm) as measured by a single-pass interferogram through the slab. Performance was achieved by producing uniform pumping and cooling of the slabs, and by controlling the distortion at the slab ends with pump shields.     

Copper bromide laser of 120-W average output power

A Ne-H₂-CuBr laser (λ510.6, 578.2 nm) is reported, which produced an average output power of 120 W at 2.5% efficiency (based on stored energy) and 100 W at 3% efficiency. These output power and efficiency figures are record values for copper bromide lasers. The sealed-off device produced maximum output power at a pulse recurrency frequency (PRF) of 17.5 kHz. Laser operating characteristics and electrical parameters are described     

20W铜蒸气激光器的数值模拟

本文采用自洽模型,对20W铜蒸气激光器的放电动力学过程进行了数值模拟,其结果与实验相符。     

High power, high-efficiency 770 nm 2D laser diode array

A two-dimensional (2D) AlGaAs laser diode array is described which operates at a power density of 2 kW/cm², with an overall efficiency of 35% and a slope efficiency of 56%. The wavelength of operation is 770 nm     

高效率激光无线能量传输系统闭环控制研究

为了实现高效率激光无线能量传输系统的研究,基于Simulink建立了激光无线能量传输系统的闭环控制仿真模型,实现了激光光伏阵列的最大功率点追踪、降压电路搭建和锂电池智能充电控制,并结合激光光伏阵列的输出特性和锂电池多阶段恒流充电方法的特性,提出了一种基于激光功率密度闭环信号控制的新型锂电池多阶段恒流充电方法.结果表明,...     

One watt average power by second harmonic and sum frequencygeneration from a single medium scale copper vapor laser

Ultraviolet (UV) powers of over 1 W have been obtained by second harmonic and sum frequency generation from a single medium scale (20 W) copper vapor laser (CVL) using a new focal geometry in which the CVL beam is focused in only one direction to produce a line focus within a BBO crystal. High optical conversion efficiencies, 20 and 30%, are observed for the low divergence (~-10 times the diffraction limit) and diffraction-limited components of the CVL output, respectively. Wall-plug efficiencies for UV generation are up to 0.04%. Efficient frequency conversion has also been demonstrated for CVL operating conditions unsuited to the generation of diffraction limited output     

高增益S波段小型化200 W功率模块研制技术

采用多级射频放大电路以及高压脉冲调制技术,实现了S波段高增益小型化200 W功率模块的研制。驱动放大电路采用GaAs功率单片进行功率合成;末级放大电路依托栅长(0.5 μm) GaN高电子迁移率晶体管(HEMT)芯片,选取多子胞结构来改善热分布,通过内匹配技术设计完成了双胞总栅宽24 mm GaN芯片的匹配网络,并设计高压脉冲调制电路提供电源,成功研制出了小型化的S波段200 W内匹配GaN功率模块。测试得出该模块实现了在输入功率10 dBm,栅极电压-5 V,漏极电压32 V,TTL调制信号输入条件下,输出频率在3.1~3.5 GHz处,输出功率大于200 W,功率附加效率(PAE)大于55%。模块实际尺寸为2.4 mm×38 mm×5.5 mm。