共查询到18条相似文献,搜索用时 60 毫秒
1.
以电光调Q的Nd:YAG激光器为泵浦源,以磷酸氧钛钾(KTP)为非线性晶体,搭建了调谐范围为750~800 nm的光参量振荡器。信号光在中心波长780.2 nm处获得单脉冲能量113 mJ、脉宽15.43 ns、光斑直径5.5 mm的输出。用光栅单色仪测量信号光光谱宽度(FWHM)为0.38 nm。信号光通过120 ℃的铷蒸气池,观察到清晰的荧光轨迹。证明信号光能有效泵浦铷蒸气,可为铷激光器提供峰值功率7 MW的高强度脉冲泵浦源,进而研究铷激光器在高强度泵浦条件下的动力学过程和基础物理机制。 相似文献
2.
光参量振荡器线宽研究 总被引:4,自引:3,他引:1
对0.532μm波长光泵浦的BBO光参量振荡器产生线宽的机制进行了详细分析和计算,结果与实验基本一致,实验结果表明泵浦光发散角是产生线宽的主要因素。文中的分析方法可推广至其它单轴晶体光参量振荡器线宽的分析。 相似文献
3.
4.
受激布里渊散射相位共轭光泵浦的高效率光学参量振荡器 总被引:2,自引:1,他引:1
报道了在Nd:YAG1.06μm激光器上,用受激布里渊散射(SBS)后向放大输出作泵浦光源,用光学参量振荡(OPO)的方法,获得1.57μm激光输出,最大输出能量为21.6mJ,相应的转换效率为32%,并与直接用Nd:YAG1.06μm激光泵浦结果相比较,效率提高1.9倍,阈值降低1.7倍,实验结果与理论分析符合的较好。 相似文献
5.
采用体光栅对商用线阵半导体激光器进行线宽压缩,得到线宽0.1 nm、中心波长780.2 nm、最高连续输出功率80 W的泵浦激光输出。为了降低热效应,通过外加斩波器将泵浦光转化为脉冲模式,脉宽440 μs,占空比为1∶5。采用长度为5 mm的铷金属饱和蒸气作为增益介质,并在常温下充入33 kPa乙烷和47 kPa氦气,进行了出光实验。在泵浦峰值功率35.4 W,铷吸收池温度120 ℃时,得到峰值功率600 mW的795 nm铷激光输出,斜率效率为1.7%。 相似文献
6.
7.
8.
近红外KTP单共振光参量振荡器 总被引:1,自引:2,他引:1
本文报道了角度调谐KTP单共振参量振荡器(SRO)的实验结果,并对结果进行了分析讨论.采用调QNd:YAG激光的二次谐波作为泵浦源.受腔镜涂膜带宽的限制,调谐范围为785~1010nm.最大的参量光脉冲能量为2.4mJ.最大的能量转换效率为26.3%. 相似文献
9.
报道0.532μm泵浦的光栅腔BBO光参量振荡器的实验研究结果,在1.02-1.08μm可调谐范围内,其输出线宽小于1nm,参量转换效率为3.5%。 相似文献
10.
采用体光栅对商用线阵半导体激光器进行线宽压缩,得到线宽0.1nm、中心波长780.2nm、最高连续输出功率80W的泵浦激光输出。为了降低热效应,通过外加斩波器将泵浦光转化为脉冲模式,脉宽440μs,占空比为1∶5。采用长度为5mm的铷金属饱和蒸气作为增益介质,并在常温下充入33kPa乙烷和47kPa氦气,进行了出光实验。在泵浦峰值功率35.4W,铷吸收池温度120℃时,得到峰值功率600mW的795nm铷激光输出,斜率效率为1.7%。 相似文献
11.
Pulsed arc discharges in alkali metal vapours are investigated for use as pump light sources for Nd:YAG lasers. Alkali lamps have a very high radiation efficiency and emit strong lines near the laser pump bands. These absorption bands are fitted by the emission spectrum of sodium and potassium lamps by changing the vapour pressure and input power. The spectral radiation distributions of the lamps are measured by a spectrograph with a gated OMA system. Ray tracing calculations for a laser cavity are used to evaluate the efficiency of the alkali radiation emission for Nd:YAG pumping. The results show that the excitation efficiency of the alkali lamps is twice as high as that of usually used rare gas lamps. For sodium resonance lines the side-on spectral radiance is calculated by a radiation transport model to estimate the pressure and the temperature profile. The results indicate that the alkali vapour lamps could be used as pump light sources with high efficiencies and low heat loading of the laser cavity. 相似文献
12.
13.
14.
15.
采用非临界相位匹配切割,尺寸5mm×5mm×20mm的KTA作为非线性光学晶体,进行了基于半导体激光端面抽运Nd:YLF/KTA的内腔式连续光学参量振荡激光研究,获得了中红外3.5μm波段的连续激光输出。为了提高连续光参量振荡腔内信号光的功率密度,降低激光输出阈值,采用对信号光高反射的单谐振腔结构进行激光实验。在8.35W的抽运功率下,分别获得了335mW和110mW的3440nm和1505nm的激光输出,对应的总转换效率达到了5.6%。该实验研究表明半导体激光端面抽运的内腔式KTA连续光学参量振荡也能获得高效的中红外激光输出。 相似文献
16.
利用半经典理论方法计算了运转于阈值以上的非简并光学参量振荡腔输出信号场、闲置场及反射抽运场的关联特性. 根据 van Loock 等提出的连续变量多组分纠缠判据, 计算结果表明, 常温下这三个光场的正交振幅分量与正交位相分量之间存在三组分量子关联, 得到了三色三组分纠缠态光场. 数值计算了关联噪声对参量振荡腔物理参数的依赖关系, 找出了产生三色三组分纠缠态产生的最佳运转条件, 为连续变量多组分纠缠态光场产生系统的设计提供了直接参考.
关键词:
连续变量
非简并光学参量振荡腔
三色三组分纠缠态 相似文献
17.
Fiber optical parametric oscillator based on photonic crystal fiber pumped with all-normal-dispersion mode-locked Yb:fiber laser 下载免费PDF全文
We demonstrate a cost effective, linearly tunable fiber optical parametric oscillator based on a home-made photonic crystal fiber pumped with a mode-locked ytterbium-doped fiber laser, providing linely tuning ranges from 1018 nm to 1038 nm for the idler wavelength and from 1097 nm to 1117 nm for the signal wavelength by tuning the pump wavelength and the cavity length. In order to obtain the desired fiber with a zero dispersion wavelength around 1060 rim, eight sam- ples of photonic crystal fibers with gradually changed structural parameters are fabricated for the reason that it is difficult to accurately customize the structural dimensions during fabrication. We verify the usability of the fabricated fiber experimen- tally via optical parametric generation and conclude a successful procedure of design, fabirication, and verification. A seed source of home-made all-normal-dispersion mode-locked ytterbium-doped fiber laser with 38.57 ps pulsewidth around the 1064 nm wavelength is used to pump the fiber optical parametric oscillator. The wide picosecond pulse pump laser enables a larger walk-off tolerance between the pump light and the oscillating light as well as a longer photonic crystal fiber of 20 m superior to the femtosecond pulse lasers, resulting in a larger parametric amplification and a lower threshold pump power of 15.8 dBm of the fiber optical parametric oscillator. 相似文献