共查询到19条相似文献,搜索用时 125 毫秒
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缓冲气体对光抽运远红外激光器频谱特性的影响 总被引:1,自引:1,他引:1
基于分子振动弛豫理论完善了缓冲气体的作用模型,利用半经典密度矩阵理论与量子力学理论,定量分析研究了缓冲气体对小型光抽运远红外激光过程的作用机理以及缓冲气体作用下小型腔式光抽运NH3分子远红外激光器的频谱特性,讨论了工作气压、抽运功率等工作参数对频谱特性的影响,并对理论计算结果进行了实验验证.二者符合得较好。研究结果表明,在小型光抽运远红外激光器中加入适当的缓冲气体,大量工作气体分子与缓冲气体分子之间的无规碰撞会引起谱线加宽,而且可以使远红外激光输出信号增强。 相似文献
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光抽运远红外激光器的输出功率受CO_2抽运源的频率、功率、远红外振荡器的腔长及工作物质的气压等多种因素的影响,起伏较大。为获得稳定的远红外激光输出,较多地采用自控环路系统稳定抽运源的频率、远红外振荡器腔长的方法。这些系统可以稳定激光器输出频率,但其输出功率则不甚稳定。一般而论,这些稳定系统都相当复杂。而在某些可能的应用中,例如用远红外激光束的散射光检测电缆的缺陷,用远红外激光研究半导体材料以及光学材料的远红外区光学性质的测量等方面,功率的稳定是至关重要的。 我们设计了一种较简单的自控环路系统,用在CO_29P(36)抽运的CH_3OH远红外激光器上,稳定 相似文献
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光泵远红外激光是气体分子转动能级之间的辐射跃迁。当气体分子吸收抽运的CO_2激光能量后,由振动基态被选择激发到高振动态的某一转动能级。它与相邻转动能级之间建立了粒子数反转。气体分子对CO_2激光能量的吸收是一种近共振吸收,频率失配一般在10兆赫之内。因此在调试连续光泵远红外激光器时,必须首先将CO_2激光频率调谐 相似文献
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连续波光抽运远红外激光器用的理想的输出耦合器必须具备:①可微调的、均匀的远红外传输系数((?)≤0.1);②远红外波长范围内的吸收小;③抽运波长下的反射良好。要得到发散缓慢的远红外输出光束,均匀传输是一个重 相似文献
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为了对多点抽运的高功率双包层光纤激光器进行深入的理论分析,从掺Yb双包层光纤激光器的速率方程和边界条件出发,对多点抽运的双包层光纤激光器的数值分析方法进行了研究。通过坐标比例变换和抽运光与激光的连续性边界条件变换,将多点抽运的高功率双包层光纤激光器的数值分析模型转化为两点边值问题,然后利用两点边值问题的数值分析方法有效地进行求解,得到了抽运光和激光沿双包层光纤的分布。通过对多点抽运的双包层光纤激光器进行数值分析,不仅得到了激光器的输出功率,还能够得到抽运光损耗以及激光损耗数值大小等数据,有助于多点抽运的双包层光纤激光器的优化分析和设计。结果表明,该数值分析方法对多点抽运的双包层光纤激光器的深入研究非常有意义。 相似文献
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斜入射激光抽运铯束频标中的光频移 总被引:2,自引:0,他引:2
本文对斜入射激光抽运斜入射激光检测小型铯原子钟实验系统上光抽运区荧光引起的光频移(主要是交流斯塔克移动)作了理论计算。结果表明斜光抽运方案可以有效降低铯原子束频标中的光频移。文中同时提出一种通过改变斜入射抽运激光发散角来直接测量光频移的新方法。 相似文献
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远红外激光具有穿透性强、光子能量低、带宽宽、通信传输容量大等优点,在公共安全、环境探测、生物医学、天文观测、军事以及通信等方面得到了广泛应用。在介绍了远红外波段激光器发展的基础之上,对产生远红外激光的各种方式进行了对比分析和总结,讨论了光泵浦远红外气体激光器的技术优势,并针对近年来远红外激光工作介质及其新谱线进行了归纳。通过对连续和脉冲光泵浦远红外气体激光器发展的回顾,结合该领域的一些重点研究方向,给出了未来光泵浦远红外气体激光器的研究趋势。 相似文献
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H. N. Rutt D. N. Travis K. C. Hawkins 《Journal of Infrared, Millimeter and Terahertz Waves》1984,5(9):1201-1219
An extensive study of the propyne optically pumped laser is presented. 32 new far infrared and 8 new mid infrared outputs are reported, together with pump frequency offset data. Complete assignments of some far infrared transitions and partial assignments of the mid infrared outputs are given. Very strong interactions occur between the mid and far infrared laser transitions. These interactions are of vital importance in obtaining high output energies. 相似文献
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R. Bocquet Yu. M. Tretyakov F. A. Krupnov L. Poteau O. Boulgne 《Journal of Infrared, Millimeter and Terahertz Waves》1996,17(6):1031-1039
The emission frequencies of several optically pumped far infrared laser lines of CH2CHF, SO2 and HDCO molecules have been measured by mixing them with a harmonic of a millimeter-wave synthesizer operating in the range 78–118 GHz. A new line of HDCO at 1886 GHz has been found. 相似文献
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Six new CW far infrared laser lines are reported for the cis 1, 2 C2 H2 F2 molecule optically pumped by a CO2 laser. Of these, two have high conversion efficiencies in the 1-2 percent range. 相似文献
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The output power of an optically pumped far infrared waveguide laser has been measured for the laser gas CH3 F between -100 and +100°C. At -30°C, an enhancement by a factor of about 3.5 over room-temperature operation has been found. The experimental data are compared with a recent theoretical treatment; the output power drops more rapidly than predicted towards both high and low temperature. 相似文献
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The power and frequency of an optically pumped far infrared laser can be monitored by piezoelectric transducers, reliable solid state devices which detect chopped absorbed radiation by the opto-acoustic effect. 相似文献
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本文对甲基氟(CH_3F)光泵远红外激光的斯塔克频移做了理论计算。指出用2.9×10~4~4.4×10~4伏/厘米的电场强度,有可能使甲基氟发射的远红外激光(496微米)与镁原子束的~3P_0→~3P_1跃迁共振,同时保证甲基氟的泵浦跃迁与 CO_2激光9P(20)线共振。预期可能的工作跃迁有四组:~QR(11,5,-11),~QQ(12,5,-11);~QR(11,6,-6),~QQ(12,6,-6);~QR(11,7,-3),~QQ(12,7,-3);~QR(11,8,0),~QQ(12,8,0)。 相似文献
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Some experimental results of the application of small electric fields on an optically pumped metal-dielectric far infrared (FIR) waveguide laser are shown. It is demonstrated that sizable modulation of the FIR output power can be obtained with ac fields. 相似文献
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Indranath Mukhopadhyay 《Journal of Infrared, Millimeter and Terahertz Waves》2003,24(5):709-755
In this paper, we have reviewed the details of experimental and theoretical aspects of the high-resolution molecular spectroscopy of methanol isotopomers. The methods of spectroscopic assignments and analysis have been discussed. The applications of the spectroscopic techniques, particularly of Fourier transform spectroscopy in the field of optically pumped Terra-Hertz Lasers (OPTL) and far infrared (OPFIR) lasers have been discussed. New assignments have been deduced for TEA-CO2 laser pumped methanol and CW CO2 pumped 13CD3OD. Stark effect analyses and the determination of accurate dipole moment values have been discussed for CH3OH, 13CH3OH and CH3 180H. The importance of high-resolution spectroscopy is also discussed in terms of astrophysical detection. Some recent ongoing astrophysical efforts are outlined. In our laboratory we are in the process of setting up a THz methanol laser for astrophysical applications and search for new coherent monochromatic laser sources. 相似文献