共查询到20条相似文献,搜索用时 125 毫秒
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建立了一个反映高重复率脉冲放电激励的Sr离子自终止激光和复合激光交替振荡的动力学模型,得到了与实测光电脉冲波形相一致的模拟结果.给出了He-Sr放电等离子中长寿命粒子、激光上下能级粒子数密度和电子温度随时间的演化过程.分析了两种激光交替振荡的发射过程、脉冲宽度特性和粒子数反转机理,认为在放电早期和余辉期电子温度的急剧升高和降低是Sr离子自终止和复合激光实现交替振荡的关键所在.
关键词:
自终止激光
复合激光
交替振荡
动力学模型 相似文献
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A cataphoresis discharge tube of 7 mm inner diameter and 38 cm active length was designed and made for the He–Sr+ laser. The cataphoretic input of uniform distribution of strontium vapor concentrations along the active region was realized by the cataphoresis effect and the slow flowing (0.5 nl/h) of helium buffer gas. The strontium ionic recombination laser at 430.5 nm and the R–M transition laser at 1.03 μm were obtained with the modified Blumlein circuit by high-frequency longitudinal pulsed discharge. The laser components are concentrated on the 430.5 nm wavelength. Dependences of working parameters such as the pulse frequency, the supply voltage, and the helium pressure on laser output characteristics were measured and discussed. The maximum laser output power of 819 mW and specific power of 56 mW/cm3 were obtained, respectively. 相似文献
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A cataphoretic input of calcium vapour into the active volume of pulsed He-Ca^+ laser is designed and made. The recombination laser at 373.3 nm and the R-M transition laser at 854.6 nm are achieved experimentally with modified Blumlein circuit by high-frequency longitudinal pulsed discharge. The dependences of work parameters such as the pulse frequency, the power supply voltage and the helium pressure on laser output characteristics at 373.3nm line are measured and discussed. The maximum laser output power of 136mW and the specific power of 5.9 m W/cm^3 are obtained, respectively. 相似文献
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We report for the first time a continuous-wave (CW) blue-green radiation at 504 nm by intracavity sum-frequency generation
of 946 nm Nd:YAG laser and 1080 nm Nd:YAlO3 (Nd:YAP) laser. Using type-I critical phase matching LiB3O5 (LBO) crystal, 504 nm blue-green laser was obtained by 946 and 1080 nm intra-cavity sum-frequency mixing, and output power
of 215 mW was demonstrated. At the output power level of 215 mW, the output power stability is better than 4.7% and laser
beam quality M2 factor is 1.21. 相似文献
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It is reported that efficient continuous-wave (CW) green laser generation at 540 nm in a KTP crystal at type-II phase matching
direction performed with a diode-pumped Nd:CaYAlO4 laser. With incident pump power of 18.2 W, output power of 324 mW at 540 nm has been obtained using a 5 mm-long KTP crystal.
At the output power level of 324 mW, the output stability is better than 2.8%. The beam quality M
2 values were equal to 1.34 and 1.22 in X and Y directions, respectively. 相似文献
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It is reported that efficient continuous-wave (CW) self-frequency-doubling red laser at 666 nm performed with a diode-pumped
Nd3+:YCa4O(BO3)3 (Nd:YCOB) laser. With a diode pump power of 14.3 W, TEM00 mode red laser at 666 nm of 570 mW is obtained. At the output power level of 570 mW, the output stability is better than
3.5%. The beam quality M2 value is about 1.25. To the best of our knowledge, this is the highest power laser at 666 nm generated by self-frequency
doubling of a diode pumped Nd:YCOB laser. 相似文献
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It is reported that efficient continuous-wave (CW) blue-green laser generation at 500 nm in a LBO crystal at type-I phase
matching direction performed with a Ti:sapphire laser-pumped Yb:KYW laser. With incident pump power of 8.7 W, output power
of 138 mW at 500 nm has been obtained using a 10 mm-long LBO crystal. At the output power level of 138 mW, the blue-green
output stability is better than 2.8%. The blue-green beam quality M
2 values were equal to 1.25 and 1.18 in X and Y directions, respectively. 相似文献
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It is reported that efficient continuous-wave (CW) red laser generation at 670 nm in a LBO crystal at type-I phase matching
direction performed with a diode-pumped Nd3+:YAlO3 (Nd:YAP) laser. With incident pump power of 15.6 W, output power of 273 mW at 670 nm has been obtained using a 10 mm-long
LBO crystal. At the output power level of 273 mW, the output stability is better than 3.7%. 相似文献
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M. Yang 《Applied physics. B, Lasers and optics》1983,32(3):127-135
A cw uv copper hollow cathode laser is described, which could be operated for a longer time duration with an output power of 7 mW in the 260 nm region. A double-cathode configuration with a protection for the mirrors from metal-vapour deposition is presented. Characteristics of the laser output power, the spontaneous emission, and the ion densities in the negative glow were measured as depending on the discharge current, the neon gas pressure, and the size of the cathode slit. The observed saturation of the laser output power at high discharge current (1 A/cm2) and the optimum slot size are discussed. 相似文献
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C. L. Li G. C. Sun X. Yu B. Z. Li X. Y. Chen M. Zhao J. B. Wang X. H. Zhang G. Y. Jin 《Laser Physics》2011,21(6):1051-1053
We report for the first time a continuous-wave (CW) blue laser emission by sum-frequency mixing in Nd:LuVO4 crystal. Using type-I critical phase-matching (CPM) LBO crystal, a blue laser at 493 nm is obtained by 1066 and 916 nm intracavity
sum-frequency mixing. The maximum laser output power of 520 mW is obtained when an incident pump laser of 18.2 W is used.
At the output power level of 520 mW, the output stability is better than 2.8%. The beam quality M
2 value is are about 1.22 and 1.31 in both horizontal and vertical dimensions respectively. 相似文献
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We report for the first time a continuous-wave (CW) blue-green laser emission by sum-frequency mixing in Nd:CNGG crystal.
Using type-I critical phase-matching LBO crystal, a blue-green laser at 497 nm is obtained by 1061 and 935 nm intracavity
sum-frequency mixing. The maximum laser output power of 232 mW is obtained when an incident pump laser of 18.2 W is used.
At the output power level of 232 mW, the output stability is better than 3.67%. The beam quality M
2 value is are about 1.26 and 1.38 in both horizontal and vertical dimensions respectively. 相似文献