共查询到19条相似文献,搜索用时 93 毫秒
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氙灯泵浦的可调谐染料激光器锁模脉冲用XeCl准分子激光器泵浦的三级染料激光放大器放大后,经倍频再用XeCl准分子激光器放大,在308毫微米处获得了微微秒高功率激光脉冲输出,其峰值功率可达500兆瓦,功率净增益为200。 相似文献
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描述一种用Nd:YAG激光二次谐波泵浦的双频振荡-放大器系统的结构和特性,用Rh6G,泵浦能量为250mJ时,输出能量高达115mJ, 在589nm处的线宽为1.2pm,泵浦脉冲的脉宽为25ns。 相似文献
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1.3 Nd:YAC激光泵浦的一种同步锁模染料激光器的非线性混频,放大和微微秒脉冲的产生利用锁模激光器泵浦的染料激光器,可产生与泵浦脉冲时间同步的极短脉冲。本文介绍利用条纹照相机进行的微微秒脉冲形成的研究。这是一种同步锁模染料激光器,用被动锁模Nd:YAG倍频激光器泵浦。利用光源的同步性质,并通过非线性方法,就可以制成高增益的短脉冲染料放大器,获得可调波长(紫外和红外)的超短(微微秒级) 相似文献
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利用MOPA激光种子源,结合氙灯泵浦行波放大方法研制了高能量脉宽可调1 064 nm波段激光器。激光器采用电调制脉宽方式控制MOPA光纤激光器脉冲信号的输出,在保证高光束质量的前提下,实现了脉宽8.6~220.9 ns可调的1 064 nm种子激光输出。选用双通放大级设计,利用氙灯泵浦Nd:YAG晶体实现五级行波放大,分析讨论了抑制自激振荡方法和行波放大过程中脉宽变窄的原因。当氙灯注入能量为60 J,重复频率10 Hz时,实现了脉宽调范围为4.2~173.3 ns的稳定1 064 nm激光输出,单脉冲能量最高可达158 mJ。 相似文献
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Linford G. Saroyan R. Trenholme J. Weber M. 《Quantum Electronics, IEEE Journal of》1979,15(6):510-523
Small-signal gain coefficients are reported for neodymium in silicate, phosphate, fluorophosphate, and fluoroberyllate laser glasses. Measurements were made in a disk amplifier under identical conditions. Using spectroscopic data as the input, amplifier gain is calculated as a function of flashlamp energy, pumping pulse duration, disk thickness, and Nd-doping. The agreement between predicted and measured gains is generally with ±10 percent, consistent with experimental uncertainties in the model and the parameters used. The operating conditions which optimize amplifier performance and efficiency for a given laser glass may be found using spectroscopic data alone. This process can be extended to derive the most cost-effective staging of amplifier chains for fusion lasers. A discussion of the model and examples of calculations are presented. 相似文献
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晶体拉曼放大器是获得高光束质量、高光谱纯度、高功率拉曼激光的重要途径。通过引入四个归一化综合参量,推导出了外腔拉曼放大器的归一化输运方程组。通过数值求解该输运方程组得到了描述拉曼放大器运转的一组普适理论曲线;分析了复合归一化变量对拉曼放大器性能的影响;研究了晶体拉曼放大器放大率、放大后拉曼脉冲形状、光-光转换效率等参量在泵浦脉冲功率密度、泵浦脉冲与被放大脉冲相对宽度、泵浦脉冲与被放大脉冲时间重叠性等条件的变化规律。用实验数据对归一化理论进行了验证,结果表明,理论结果与实验数据相吻合,证明了文中理论计算的正确性和可行性。 相似文献
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飞秒光学频率梳在精密计量学和光谱学中扮演着革命性的推动角色,成为近二十年超短脉冲激光技术及应用研究领域最活跃的前沿方向之一。文中基于250 MHz重复频率(frep)的掺镱(Yb)光纤激光器,研究了不同腔内色散以及锁模机制对飞秒脉冲序列载波包络相位偏移频率(fCEO)噪声的影响。通过对飞秒光梳细节的优化,得到了49 dB信噪比的fCEO拍频信号并获得了秒稳3.210-10的锁定结果,同时frep的锁定结果也达到了到了秒稳3.410-13的精度。此外文中还研究了不同啁啾状态的种子光飞秒脉冲对基于大模场面积双包层Yb光子晶体光纤放大器输出光脉冲宽度的影响。以携带-3.8104 fs2预啁啾量的光脉冲作为种子光,在60 W 976 nm半导体激光泵浦下,获得了250 MHz重复频率、23 W平均功率和66 fs压缩后脉冲宽度的激光输出。 相似文献
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Tatum J.A. MacFarlane D.L. Bowen R.C. Klimeck G. Frensley W.R. 《Quantum Electronics, IEEE Journal of》1996,32(4):664-669
We characterize a visible, 670 nm, diode laser amplifier with respect to parameters of interest in short pulse generation and amplification. With a single pulse in the amplifier, we measure the differential gain and saturation energy of the amplifier, and changes in the optical spectrum of a pulse traveling through the amplifier. We also measure the ultrafast gain dynamics using a pump and probe technique. We find the ultrafast gain recovery time due to carrier heating is 400 fs±30 fs. Our results differ quantitatively from those reported for InGaAsP and AlGaAs amplifiers 相似文献
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Characteristics of the pumping discharge pulse and laser pulse in a Cu/CuCl double pulse laser have been measured as a function of time delay, buffer gas pressure, and tube temperature. We have found that for otherwise fixed discharge conditions, pumping rates decrease as these quantities are increased. The shape of the laser pulse as a function of time delay is shown to be dependent on the rate of current rise of the pumping pulse. The length of time required by the pumping pulse to achieve threshold is found to be a function of time delay, buffer gas pressure, and tube temperature. The implications of this behavior for the role of metastable copper and its mode of relaxation are discussed. 相似文献
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采用光纤耦合激光二极管端面抽运Nd:YVO4激光晶体,抽运光平均功率为20W,脉冲宽度为100μs,获得了重复频率为1 kHz、平均功率为1.5 W的再生皮秒脉冲激光输出,脉冲宽度约为15 ps,两个方向上的光束质量因子均小于1.4。 相似文献