共查询到18条相似文献,搜索用时 93 毫秒
1.
BBO晶体在CPM非稳腔Nd:YAG激光器中的腔内倍频效应 总被引:1,自引:1,他引:0
本文报道用BBO晶体作为腔内倍频元件,在带抗共振环的对撞脉冲锁模非稳腔Nd:YAG激光器中实现腔内倍频激光输出,获得倍频能量转换效率为50.4%.理论和实验均证明了该激光器的BBO腔内倍频转换效率高于腔外倍频转换效率. 相似文献
2.
用倍频晶体KTP实现Nd:YAG激光锁模的研究 总被引:1,自引:1,他引:0
报道用倍频晶体KTP实现Nd:YAG激光锁模的系统研究,给出了该锁模激光器输出脉宽的表达式,并和实验测量值相比较,计算值跟实验结果符合较好.文中还分析了各种参数对该锁模激光输出性能的影响. 相似文献
3.
Nd:YAG激光器中的自锁模 总被引:3,自引:2,他引:3
本文报道在Nd:YAG激光器中首次获得的自锁模脉冲序列.自锁模是由于Nd:YAG棒中的自相位调制引起的.在主被动对撞锁模运转情况下,自锁模对脉冲波形有较大的影响. 相似文献
4.
本文描述了利用KTP晶体和腔的基波输出镜构成非线性镜实现1.08μmNd:YAP激光器的被动锁模。实验表明,这种新的锁模技术比用染料作可饱和吸收体的被动锁模技术有很多突出的优点,具有很大的发展潜力。实验测得锁模时基波1.08μm输出2.4mJ,二次谐波0.54μm输出0.5mJ(同样条件下的静态输出为2.5mJ),基波脉冲的平均脉宽为40ps。 相似文献
5.
Cr^4+:YAG在对撞脉冲锁模的Nd:YAG激光器中实现被动锁模的研究 总被引:8,自引:1,他引:7
在理论上提出了Cr^4+:YAG作为可饱和吸收体在Nd:YAG激光器中实现被动锁模的可能性,运用速率方程组导出在强激光脉冲作用下Cr^4+:YAG激发态吸收的恢复时间和饱和光强。实验上在带有抗共振环结构的接近于介稳腔的脉冲式Nd:YAG激光器中用Cr^4+:YAG作为可饱和吸收体实现被动锁模运转,得到能量13.5mJ、平均脉宽180ps的锁模脉冲序列。 相似文献
6.
锁模Nd:YAG激光器选取单脉冲时,通常采用KD*P普克尔盒。 波长1.06μm的激光半波电压为6.6kV。应用冷阴极闸流管KN-22作为开关线路比较广泛,但近年来我们改用MOS场效应管线路代替KN-22,该线路性能稳定可靠,输出脉冲幅度为-6.6~-8kV,脉冲宽度5~10ns可调,触发晃动小于0.5ns,触发延时30~40ns,单脉冲选出率为100%。经长时间使用未发现异常,此线路也可在削波器及脉冲剪切等技术中应用。 相似文献
7.
在Nd:YAG激光器中,用单晶硅实现了被动锁模,得到了脉冲定义为28ps左右,能量为约3μJ的锁模脉冲,并对锁模机理作了初步解释。 相似文献
8.
一种连续Nd:YAG激光锁模的新技术 总被引:1,自引:0,他引:1
本文首次报道了在连续运转的Nd:YAG激光器上通过移动腔镜实现锁模的实验研究。获得平均宽度为60ps的锁模脉冲序列。文中提出了实验结果的初步解释,表明这种锁模现象是一种增强的自锁模。 相似文献
9.
自锁模Cr:LiSAF激光器的实验研究 总被引:2,自引:1,他引:1
以功率为900mW,波长为488nm的单线氩离子激光作为泵浦源,在腔内不加任何主动调制器和可饱和吸收体的情况下实现了Cr:LiSAF激光器的飞秒级自锁模运转,得到了脉冲宽度为40fs,重复频率为100MHz,平均输出功率为45mW的稳定的锁模脉冲序列。 相似文献
10.
富勒烯抑制自由运转的Nd:YAG激光器中的自锁模 总被引:1,自引:1,他引:0
研究了放在Nd:YAG激光腔内的含富勒烯样品对激光波形的影响。实验发现,富勒烯的强非线性吸收可用于光滑纳秒范围的自锁模脉冲序列,估计这是由于双光子吸收引起的。 相似文献
11.
V. N. Belyi N. V. Kondratyuk A. A. Shagov A. G. Mashchenko 《Journal of Applied Spectroscopy》2000,67(2):364-368
Special features of the parameteric amplification of light in a BBO crystal in the pumping field of YAG:Nd laser radiation
(λ=1.064 μm) were investigated in the case in which the wavelength of the amplified signal of light lay within the eye-safe
region of the spectrum and the idle wavelength lay within the region of strong absorption. The correlation between the parametric
gain coefficient and the linear absorption coefficient of the crystal has been revealed.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 67, No. 2, pp. 263–266, March–April, 2000. 相似文献
12.
The resonantor design asnd dynamic performance of a CW actively modelocked frequenxy-doubled Nd: YAG laser pump source with a single-lens telescopic resonator have been researched. 16W CW mode-locking out-put power and 1.6W CW mode-locking frequency-doubled green light output were obtained with 200 MHz repetition rate and 3.5kW single pump lamp. 相似文献
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P. K. Datta Chandrajit Basu S. Mukhopadhyay S. K. Das G. K. Samanta Antonio Agnesi 《Pramana》2004,63(5):1003-1010
A non-linear mirror consisting of a lithium triborate crystal and a dichroic output coupler are used to mode-lock (passively)
an Nd : YVO4 laser, pumped by a diode laser array. The laser can operate both in cw mode-locked and simultaneously Q-switched and mode-locked
(QML) regime. The peak power of the laser while operating in QML regime is much higher but pulses suffers from poor amplitude
stability. The incorporation of an acousto-optic modulator as an active Q-switch enhances the stability of the QML pulse envelope.
The second-order non-linearity of powdered crystalline urea is conclusively measured with respect to KDP while the laser is
operating in passively Q-switched and passively mode-locked regime as well as in actively Q-switched and passively mode-locked
regime. 相似文献
16.
A mode-locked solid-state laser containing a birefringent element is shown to emit synchronously two frequency combs associated to the two polarization eigenstates of the cavity. An analytical model predicts the polarization evolution of the pulse train, which is determined by the adjustable intracavity birefringence. Experiments realized with a Nd:YAG laser passively mode locked by a semiconductor saturable absorber mirror are in perfect agreement with the model. Locking between the two combs arises for particular values of their frequency difference, e.g., half the repetition rate, and the pulse train polarization sequence is then governed by the relative overall phase offset of the two combs. 相似文献
17.
宽调谐高效率的BBO光参量振荡器 总被引:2,自引:2,他引:0
本文报道用354.7nm泵浦的单共振BBO脉冲光参量振荡器在413~661nm和2513~765nm波段内获得了可调谐的振荡输出,最高总能量转换效率达52%;文中还讨论了输出特性。 相似文献
18.
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