激光二极管泵浦的调Q Nd：YAG激光器的理论研究

本文主要从理论上分析了ＤＰＬ调Ｑ激光器的动态特性，并对电光调Ｑ与声光调Ｑ激光器的输出特性进行比较。     

高功率LD泵浦的Q开关内腔倍频Nd:YVO4激光器的研究

对高功率准连续激光二极管（LD）泵浦的声光调Q内腔倍频Nd:YVO4激光器进行了实验研究,获得了输出3.2W、532nm波长的光,其重复率达22kHz。     

LD泵浦的声光调Q腔内倍频固体激光器

应用国产的８０８ｎｍ激光二极管（ＬＤ）研制了声光调Ｑ的Ｎｄ：ＹＶＯ４－ＫＴＰ腔内倍频的准连续、单脉冲激光器,得到了ＴＥＭ００模、频率为２０ｋＨｚ的准连续稳定的５３２ｎｍ原绿光输出,阈值泵浦功率为３００ｍＷ。在连续２Ｗ的泵浦功率下,准连续绿光输出为１２０ｍＷ,脉冲宽度为４０ｎｓ,单脉冲能量为５０μＪ,通过对声光Ｑ开关的驱动电源改造,得到了单脉冲激光输出。在分析计算的基础上,建立了２Ｗ、８０８ｎｍＬＤ     

激光二极管泵浦的调Q Nd：YAG激光器的理论研究

本文主要从理论上分析了ＤＰＬ调Ｑ激光器的动态特性，并对电光调Ｑ与声光调Ｑ激光器的输出特性进行了比较．     

量子阱激光二极管泵浦单块Nd∶YLF激光器

用多量子阱激光二极管列阵(MQW-LDA)泵浦单块Nd:YLF激光器,脉冲工作,获得1.047μm的线偏光输出。阈值泵浦功率6.8mW,斜率效率为24％,输出脉冲能量达6.7μJ;用增益开关获得50mW的峰值功率输出。理论计算了泵浦阈值、斜率效率,获得了增益开关的数值解结果,与实验基本一致。     

二极管泵浦声光调Q窄脉冲Nd:YAG激光器

研制了采用光纤耦合输出的连续激光二极管端面泵浦声光Q开关Nd：YAG激光器,分析了影响窄脉冲的几个关键因素。测试结果表明,在重复频率1kHz时,获得最窄脉宽为5．5ns,最大峰值功率为76kw;在重复频率20kHz时,最大平均功率为4W(脉宽16ns),斜效率达33．4％。     

二极管泵浦的声光Q开关高重频Nd:YAG激光器研究

采用光纤耦合输出的连续激光二极管端面泵浦声光Q开关Nd:YAG激光器，在重复频率1kHz时，获得最窄脉宽5.5ns，最大峰值功率76kW；在重复频率20kHz时，最大平均功率4W（脉宽16ns），斜效率达33.4％。并对实验结果进行了讨论。     

包层泵浦调Q光纤激光器的研究进展

从双包层光纤和包层泵浦调Q技术对包层泵浦调Q光纤激光器的研究和发展进行了综述，并报道了我们在该领域的最新研究结果。     

同步泵浦声光调Q全固态脉冲激光器

本文首次提出了同步泵浦声光调Q全固态脉冲激光器，分析了其基本理论，设计并实现了这种新型激光器。它克服了现有小型全固态脉冲激光器存在寄生多脉冲和峰值功率还不够高的缺点，用2W LD的泵浦时，得到了重复频率为4．5kHz、峰值功率为6kW、脉宽为18ns、无寄生脉冲的连续脉冲激光输出，可以较好地满足激光测距和激光雷达对此类激光器性能的要求。本文对实验方案、设备和结果进行了详细的描述。     

Frequency modulation mode-locking and Q-switching of diode-laser-pumped Nd:YLF laser

Using frequency modulation (FM) mode-locking techniques, and pumping with a 500 mW laser diode, the authors have developed a Nd:YLF (yttrium lithium fluoride) laser operating at 1053 nm that produces 49 mW average power in pulse durations of 9 ps. When this system is Q-switched, the energy within the 90 ns pulse envelope is 17 mu J. The average mode-locked pulse duration within this envelope is 21 ps giving rise to a peak power of 22 kW.<>     

A pulse transmission mode Q-switched Nd:YLF laser pumped bycylindrical microlens-collimated diode bars

A Q-switched cavity-dumped single-transverse-mode Nd:YLF laser pumped by two 60-W quasi-CW diode bars collimated using cylindrical microlens technology produced 4-mJ, 4.5-ns pulses. The pump geometry employed has many of the advantages of longitudinal pumping yet allows the use of high-power quasi-CW bars while requiring only 1 optical element     

无温控多波长LD泵浦方棒状Nd∶YAG固体激光器

报道了一种多波长LD泵浦方棒状Nd∶YAG无温控固体激光器。激光器采用LD侧面泵浦方式,LD泵浦模块由四种不同中心波长的LD组合而成,常温25℃时,各bar条中心波长分别为802 nm、804 nm、806 nm、808 nm,LD模块光谱半高全宽为7 nm左右;工作介质为侧面双通方棒状Nd∶YAG键合晶体,通过控制光路可以增加工作介质的有效吸收长度;调Q方式为电光调Q;得到一种无温控固体激光器。该激光器在-40^+60℃温度范围内,可以无温控稳定输出能量≥40 mJ;输出激光水平方向发散角θ2 x=1.79 mrad,垂直方向发散角θ2 y=1.36 mrad;光束质量:M 2 x=4.858,M 2 y=2.697。     

CW laser operation of Nd:YLF

CW laser operation of Nd:YLF is reported for the first time and, in a comparison to Nd:YAG, exhibits a lower threshold and higher single-mode average power. The TEM00mode volume of Nd: YLF was observed to be a factor of four larger than Nd:YAG, resulting in twice the TEM00mode average power. This result is attributed to the substantially lower thermal lensing of YLF with respect to YAG. In comparative measurements the stimulated emission cross section of Nd:YLF was found to be1.8 times 10^{-19}cm²for the π oscillation and1.2 times 10^{-19}cm²for the σ oscillation, as compared to2.4 times 10^{-19}cm²for Nd:YAG. The spectroscopic and lasing parameters of Nd:YLF indicate a potential for this material in high peak and average powerQ-switched applications.     

Resonant passive mode-locked Nd:YLF laser

The authors review the theory of resonant passive mode locking (RPM) lasers and present experimental results for an improved Nd:YLF RPM laser that produced stable pulses as short as 3.7 ps at a repetition rate of 250 MHz. The average output power was 550 mW with 1.3-W average pump power from a Ti:sapphire laser. It was possible to couple 85% out of the nonlinear coupled cavity and still maintain stable mode locking. In RPM and amplitude nonlinearity such as absorption bleaching in a semiconductor reflector introduces an intensity-dependent reflectivity which strongly mode locks the laser. The reduced carrier lifetime in a low-temperature MBE-grown (LT) InGaAs-GaAs quantum-well reflector produces a sufficiently fast saturable absorber in the coupled cavity     

Nd:YAG laser pumped infrared dye laser

Efficient operation of a high peak power and high-average power infrared dye laser, continuously tunable over the range of 10810-12160 Å, has been achieved by pumping with an Nd:YAG laser. A peak power as high as 4 MW with an average power of 390 MW was obtained.     

激光二极管泵浦Nd：LMA固体激光器

分析了铝酸镁镧晶体用于半导体激光泵浦的优点，用ＬＤＡ纵向泵浦Ｎｄ：ＬＭＡ单块固体激光器，得到波长为１．０５μｍ，连续功率为３０ｍＷ的ＴＥＭ模激光输出，线偏振度为１００％泵浦阈值功率为２５０ｍＷ。     

A single frequency Nd:YAG ring laser pumped by laser diodes

The design and operation of a diode-pumped Nd:YAG ring laser is described. The laser is shown to be a highly versatile device, capable of efficient generation of both the fundamental and second harmonic frequencies, CW and Q-switched. Single-frequency outputs in excess of 540 mW at 1.06 μm and 18.9 mW at 532 nm output were obtained, whereas multi-longitudinal mode Q-switched operation produced 22.4 μJ per pulse at 5 kHz in the fundamental and 7.3 μJ power pulse at 532 nm     

GaAs被动调Q固体激光特性研究

使用紧凑的直线平-凹腔结构,利用半导体饱和吸收片GaAs实现了二极管(LD)端面抽运Nd:GdVO4高重复频率的被动调Q 1.06μm激光运转,在8 W的泵浦功率下获得平均输出功率达0.98 W的稳定激光输出,最小脉冲宽度为60 ns.最高重复频率达240 kHz.