红宝石激光泵浦甲烷的高阶受激喇曼散射

报道用红宝石激光泵浦甲烷的高阶受激喇曼散射，并讨论了高阶反斯托克斯光产生的条件。     

KrF准分子激光泵浦H_2受激喇曼散射

利用KrF激光泵浦高压H_2,产生受激喇曼散射(SBS),得到时间宽被压缩的Stokes光和Anti-Stokes光,一阶Stokes光的发散角被压缩到泵浦光的1/3。研究了缓冲气体对Stokes光转换效率的影响。     

YAG激光泵浦光纤产生受激喇曼散射

本文利用YAG激光泵浦光导纤维产生受激喇曼散射,并利用所摄取的受激喇曼光谱图定出斯托克斯线波长,计算样品的喇曼频移,对实验中所观察到的现象进行分析讨论。     

四氯化碳的背向受激喇曼散射研究

用倍频Ｎｄ：ＹＡＧ锁模激光５３２ｎｍ泵浦ＣＣｌ４的背向受激喇曼散射，一阶斯托克斯谱线５４６ｎｍ的能量转移效率为１３％，脉宽（ＦＷＨＭ）为８ＰＳ，比泵浦激光５３２ｎｍ的脉宽４０ＰＳ明显变窄。     

利用受激喇曼散射稳定超短光脉冲能量

本文报道利用受激喇曼散射稳定超短光脉冲的新颖方法。实验上得到能量涨落比泵浦光小得多的高稳定性前向一阶斯托克斯光。并给出定性理论分析。     

准分子激光在甲烷中受激喇曼散射的阈值和光谱特性研究

本文报导氯化氙准分子激光束在甲烷气体中的受激喇散射特性,研究了阈值与气压的关系,并观察到一些新的喇曼散射谱线。     

液氮的受激喇曼散射研究

本文使用染料测Q红宝石激光激励液氮的受激喇曼散射，观察到一级斯托克斯、一级反斯托克斯和二级反斯托克斯线，测得散射光的喇曼频移、线宽、能量转换率和退偏振度等参数．并对所得结果进行了讨论。     

Na蒸气中双支受激超喇曼散射的观察

首次同时观察到共振Na4D态激励时,3S→4P_(3/2),4P_(1/2)双支受激起喇曼散射,并同时观测到与之级联的4P-4S等双支原子跃迁谱线.     

窄脉冲泵浦的Raman放大研究

基于振幅耦合方程,引入入射处信号脉冲与泵浦脉冲的时间差,研究了光纤中单个信号脉冲与窄泵浦脉冲的作用。将泵浦脉冲取为双曲正割形式,得到交叠因子、信号光振幅、泵浦光振幅的解析解,及信号功率沿光纤的分布。研究了长光纤中信号脉冲与多个泵浦脉冲的作用,推导出考虑插损时的信号增益。     

Stimulated Brillouin and Raman scattering for the generation ofshort excimer laser pulses

In this experimental work, the SBS and SRS processes were used in order to produce UV laser beams of good optical quality and short time duration. An XeCl oscillator and a double-pass amplifier with a phase-conjugate mirror via stimulated Brillouin scattering, generate the laser beam at 308 nm to pump a Raman cell. The oscillator pulse was 11 ns long, while the amplified phase-conjugate beam duration could vary from 3.3 to 1.5 ns, due to the compression operated by the Brillouin mirror. When this last laser beam was focused into a Raman cell containing methane at 30 atm, the shortest backward stimulated Raman scattering pulse at 338.4 nm was 170 ps long with 0.4 ml of energy. The 338.4-nm wavelength is interesting for the production of short bunches of cold electrons from Mg and Zn targets     

Single-pass Raman generation pumped by a mode-locked laser

Single-pass Raman generation pumped by a mode-locked Nd:YAG laser is investigated for long-span and low-loss fibres. The peak wavelength of the first Stokes jumps dramatically from 1.114 ?m to 1.12 ?m at 1.65 W average input power. The first Stokes increases rapidly between the inputs of 1.65 W and 2.1 W. These characteristics of single-pass stimulated Raman scattering are discussed in terms of group velocity matching.     

High-power dye laser pulses by cascaded controlled transient oscillation

The output of a picosecond cascade-pumped controlled transient oscillation (CTO) dye laser has been amplified to the millijoule level. Single-mode operation and frequency selection with a spectral width of 0.2 nm were achieved by using an angle-tuned narrow-band interference filter. A plasma shutter was employed as a pulse clean-up device for these high-power laser pulses. This device had a transmission of 86 percent and provided background-free operation for the laser system. Sychronizable output pulses with an energy of 2 mJ and a duration of 20 ps at 10 pps were routinely produced. The gain of the amplifier chain was about7.5 times 10^{4}.     

High-efficiency continuous-wave Raman laser pumped by an injection-locked broad-area diode laser

We report an efficient CW far-off-resonance Raman laser in H/sub 2/ gas pumped by an injection-locked broad-area diode laser. The pump wavelength 794 nm is Raman shifted to the Stokes wavelength 1185 nm. The total output Stokes power reaches 21.6/spl plusmn/0.5 mW and the photon conversion efficiency reaches (74/spl plusmn/10)%.     

Near ultraviolet optically pumped vertical cavity laser

Optically pumped near ultraviolet vertical cavity laser operation (VCSEL) has been obtained under quasi-continuous wave conditions at room temperature near 383 nm from shallow InGaN/GaN multiple quantum wells (MQWs). Low loss optical resonators were fabricated by using in-situ grown (Al,Ga)N distributed Bragg reflectors that featured strain engineering design for high optical morphology, in combination with low-loss dielectric multilayer mirrors     

激光二极管泵浦高功率Nd：YAG紫外激光器

对半导体侧面泵浦Nd:YAG准连续高功率紫外激光器进行实验研究,首次采用新颖谐振腔型对基波进行非线性转换获得稳定的355nm紫外激光输出.在主谐振腔中,3列相互呈120°放置的激光二极管线阵对中心处直径3mm的Nd:YAG晶体棒进行连续泵浦,实现了1064nm基频光稳定振荡;在子腔中,使用对基频光双程倍频双程和频的方法提高转换效率,实现了高功率准连续355nm紫外激光单向稳定输出;实验使用角度调谐的Ⅰ类相位匹配LB0晶体与Ⅱ类相位匹配LBO晶体,当调制频率5.4kHz时,355nm紫外激光最高平均输出功率1.89W,脉冲宽度小于65ns,1h内输出功率抖动低于7%.     

LD抽运355nm准连续紫外激光器

采用连续LD端面抽运,腔内插入Cr+4:YAG,KTP和LBO等晶体,并采用自孔径选模,获得较好光束质量的准连续紫外激光输出。在抽运功率12W的条件下,紫外激光输出功率约50mW,重复频率10kHz,近场光斑显示获得近似基模的355nm紫外激光。     

同步泵浦染料激光器产生高功率可调谐微微秒激光脉冲

本文介绍一种用Nd:YAG双锁模的倍频脉冲序列,同步泵浦以曲率半径R=2m的凹面光栅所组成的染料激光器,实现了高功率可调谐的微微秒染料激光输出。用条纹照相机对同步泵浦锁模激光系统中各部分的输出特性进行了实验研究和测试。