共查询到20条相似文献,搜索用时 343 毫秒
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E. Flores-Romero R. Rangel-Rojo H. Márquez G. V. Vázquez J. Rickards R. Trejo-Luna 《Laser Physics》2008,18(5):637-640
We report the observation of sustained self-pulsing behavior of the output of a channel waveguide Nd:YAG laser under a CW pump. The duration and repetition rate of the pulses observed were dependent on the pumping power. At the maximum pumping power available (44 mW of absorbed power), the pulse duration was around ~40 ns, and the pulse repetition rate was ~1.4 MHz. We discuss the possible physical mechanisms that generate the pulsing behavior, and their implications on the observed pump-power dependence of the repetition rate. 相似文献
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A compact diode-end-pumped passively Q-switched intra-cavity frequency doubled Nd:YAG/Cr4+:YAG composite crystal laser was demonstrated. The pulsed laser at 532 nm was produced and the dependence of the average out
power, pulse width and pulse repetition rate on incident pump power were measured. Under the pump power of 14 W, the minimum
pulse width of 3.5 ns with repetition rate of 27.5 kHz was obtained, corresponding single-pulse energy of 18 μJ and peak power
of 5.3 kW. 相似文献
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激光二极管抽运的被动调QNd3+:YAG微晶片激光器及其稳定性 总被引:8,自引:0,他引:8
从理论和实验两个方面研究了连续激光二极管抽运的Cr~(4+):YAG被动调QNd~(3+):YAG微晶片激光器。考虑Cr~(4+):YAG饱和吸收体激发态吸收,推导了连续抽运的被动调Q微晶片激光器的速率方程,分析了微晶片参量对调Q脉冲半峰全宽和峰值功率的影响;提出了实现稳定脉冲输出的微晶片激光器设计原则。在饱和吸收体初始透过率较低(T_0≈40%)的情况下,获得了脉冲峰值功率不稳定性小于±0.7%、脉冲宽度不稳定性小于±1.0%、峰值功率高达千瓦量级的高重复频率激光输出。 相似文献
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1.319μm连续固体锁模激光器 总被引:3,自引:0,他引:3
报道了1.319μmNd:YAG连续锁模激光器的技术研究。激光器的谐振腔为低热敏腔,用声光振幅调制器作为锁模元件,泵浦腔具有较高的泵浦效率和输出稳定性,获得了重复频率100MHz,平均功率~0.54W,脉宽<170ps的光脉冲。 相似文献
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The operation of an all solid-state pulsed Nd:KGW Raman laser pumped by compact passively Q-switched Nd:YAG/Cr:YAG laser is
demonstrated. The first-Stokes radiation of stimulated Nd:KGW Raman scattering at the 1178 nm is generated. The average output
power of 336 mW at Stokes wavelength was obtained under the laser diode pump power of 5.74 W. The corresponding optical efficiency
from the diode light to the Raman output is 9.85%. The pulse width of 1.65 ns and a pulse repetition rate of 10 kHz were also
obtained. 相似文献
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A diode-end-pumped high repetition rate, high peak power acousto-optical (AO) Q-switched 946 nm Nd:YAG laser was demonstrated
in this paper. In our experiments, a 20 mm miniature acousto-optical Q-switch was employed in a 45 mm linear laser cavity
for generating the short laser pulse. At a repetition rate of 10 kHz, a maximum average output power of 2.9 W was achieved
with a pulse width of 24.4 ns, giving a peak power of 11.9 kW. To the best of our knowledge, this is the highest peak power
946 nm Nd:YAG laser at high repetition rate operation. Moreover, pulse train with good stability was also obtained at the
repetition rate of 50 kHz. At an incident pump power of 22.3 W, up to an average output power of 3.5 W pulsed 946 nm laser
was generated at 50 kHz with a pulse width of 69 ns, corresponding to an optical conversion efficiency of 15.7% and an average
slope efficiency of 24.1%, respectively. 相似文献
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对激光二极管端面泵浦Cr4+:YAG被动调QNd:YAG激光器输出特性进行了实验研究.实验研究发现,激光器输出功率及脉冲重复频率随谐振腔长度增大而增大.为解释这一实验现象,测量了泵浦光斑在激光晶体内尺寸,同时计算了激光晶体及Cr4+:YAG晶体内的基模激光光斑半径随谐振腔长度变化.分析结果表明:激光晶体内泵浦光斑尺寸远小于激光晶体内基模光斑半径,腔模间交叠效率较低;当腔长增加时,激光晶体内的基模激光光斑减小,腔模间交叠效率增加,从而导致输出功率及脉冲重复频率随腔长增加而增加;另外,Cr4+:YAG晶体内光斑半径也随谐振腔长度减小,引起Cr4+:YAG晶体漂白时间缩短,导致脉冲重复频率随腔长增加而增加. 相似文献
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The self-Q-switched laser performance of monolithic Cr4+,Nd3+:YAG concave-planar resonator with 5-mm length was studied experimentally and theoretically. The slope efficiency is as high as 24% and pump threshold is as low as 64 mW. The pulse width, the single pulse energy and the pulse repetition rate of monolithic Cr,Nd:YAG self-Q-switched laser were measured as a function of absorbed pump power. With the increase of pump power, the pulse width decreases and the pulse energy and the pulse repetition rate increase. The average output power of 91 mW with pulse width of 7 ns at repletion rate of 35.5 kHz was obtained at the maximum absorbed pump power of 440 mW, the peak power is as high as 370 W. The theoretical prediction of pulse energy, pulse width and pulse repetition rate as a function of absorbed pump power based on rate equations is in a good agreement with our experimental data. This can lead to develop the diode laser-pumped monolithic self-Q-switched solid-state microchip lasers. 相似文献
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用连续输出100mw和脉冲输出200mW的国产双异质结激光二极管(DH-LD)泵浦Nd:YAG激光器,得到稳定的半导体激光泵浦的固体激光器连续输出12mW和10~50kHz重复频率的准连续输出,每个脉冲激光峰值功率20mW,起伏小于1%,与计算结果基本一致. 相似文献
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Ultrashort pulses were generated in passively mode-locked Nd:YAG and Nd:GdVO4 lasers pumped by a pulsed laser diode with 10-Hz repetition rate. Stable mode-locked pulse trains were produced with the pulse width of 10 ps. The evolution of the mode-locked pulse was observed in the experiment and was discussed in detail. Comparing the pulse evolutions of Nd:YAG and Nd:GdVO4 lasers, we found that the buildup time of the steady-state mode-locking with semiconductor saturable absorber mirrors (SESAMs) was relevant to the upper-state lifetime and the emission cross-section of the gain medium. 相似文献
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A laser diode (LD) pumped Nd:YAG red pulse laser at 660 nm was presented by V:YAG passively Qswitching and LBO intracavity frequency doubling. With 1.6-W incident pump power, average output power of 46-mW, pulse duration (FWHM) of 23.3 ns, pulse repetition rate of 21.6 kHz, peak power of 91.4 W, and single pulse energy of 2.13μJ were obtained. The beam quality factor M2 was less than 1.2. The fluctuations of pulse energy and repetition rate were less than 3% in 4 hours. The pulsed laser at 660 nm is expected to be used as the pump source of Cr3+:doped crystal to obtain the gain-switched tunable laser. 相似文献
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A LD-pumped, LBO intracavity frequency doubled and Cr:YAG passively Q-switched Nd:YAG green laser was reported in this letter. With 600 mW incident pump laser, Q-switched green laser with average power of 27 mW, pulse width of 15.2 ns, repetition rate of 16.4 kHz and peak power of 108.1 W was obtained. 相似文献
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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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激光二极管端面连续抽运的Cr^4+:Nd^3+:YAG微片激光器输出特性研究 总被引:2,自引:0,他引:2
报道了腔长为1.1mm的激光二极管端面抽运的Cr^4 :Nd^3 :YAG自调Q微片激光器,连续抽运下获得了平均功率为5—18mW、重复频率为1—10kHz的稳定的调Q激光脉冲输出序列。并且对微片激光器的调Q输出激光的单脉冲特性参量、重复频率以及抽运阈值功率等进行了理论研究,计算结果和实验结果比较吻合。 相似文献
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报道了用两个1.5W激光二极管偏振耦合端面泵浦的声光调Q内腔倍频Nd:YAG激光器。输出532nm绿光重复频率1KHz时,最大峰值功率为2.23KW,最窄脉宽为18ns,平均功率40mW。最高重复频率30KHz。重复频率15kHZ时,最高平均率128mW。对声光调Q内倍频Nd:YAG激光器的动态特性进行了理论分析及计算。 相似文献
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We report the specification of a compact and stable side diode-pumped Q-switched pulsed Nd:YAG laser. We experimentally study and compare the performance of the pulsed Nd:YAG laser in the free-running and Q-switched modes at different pulse repetition rates from 1 Hz to 100 Hz. The laser output energy is stabilized by using a special configuration of the optical resonator. In this laser, an unsymmetrical concave-concave resonator is used and this structure helps the mode volume to be nearly fixed when the pulse repetition rate is increased. According to the experimental results in the Q-switched operation, the laser output energy is nearly constant around 70 mJ with an FWHM pulse width of 7 ns at 100 Hz. The optical-to-optical conversion efficiency in the Q-switched regime is 17.5%. 相似文献