放电激励的Ca+共振亚稳跃迁激光器的研究

理论上从分析Ca+的能级结构着手,确认其是一种很好的共振亚稳跃迁激光工作物质.实验上以氖为缓冲气体,在内径为12.9 mm, 电极间距为45 cm的石英放电管中,获得了平均功率为406 mW,功率密度为6.9 mW/cm3的红外共振亚稳跃迁激光输出.测量了一些参量之间的关系,分析了Ca+红外激光的工作特性.     

Kinetic analysis of the factors limiting the output power of the Ne--CuBr UV laser

The parametric optimization of the Ne--CuBr UV laser excited by longitudinal pulsed discharge is analysed by using a self-consistent kinetic model. Consistent characteristics of the optimization process are obtained by comparing with the experimental results. Simulation results show that neon ions come into being along with considerable depletion of the ground-state copper atoms. And the optimization of the discharge tube diameter is the tradeoff between the specific output photon density and the total active volume. Both the optimal neon gas pressure and the optimal reservoir temperature result from the balance between the neon ion density and the ground-state copper atom density to arrive at a maximum of their product.     

金属蒸气激光G判据的进一步验证

将先前提出的放电激励金属蒸气自终止类型激光器高效运转的补充判据(G判据)从应用于中性原子激光介质推广至一价离子激光介质,取得了圆满的成功.对已知的17条一价金属离子自终止激光谱线进行鉴别,其中16条均符合G判据,1条不符合G判据的特例也给出了合理解释.进而对业已提出的212条可能的一价金属离子自终止激光谱线进行筛选,认为其中仅有69条符合G判据值得深入探索 关键词： 金属蒸气激光 G判据     

A Discharge—Excited SrBr2 Vapour Laser

A new-style discharge tube for a metal vapour laser has been designed and built.SrBr2 was successfully used to replace the metal strontium as a working medium.Multi-line laser oscillations from resonance to metastable transition of strontium atoms (6.45μm),ions (1.03μm/1.09μm) and from strontium ion recombination (416.2nm/430.5 nm)have been obtained through longitudinal pulsed discharge.The problem of an incompatibility reaction between metallic strontium and the discharge tube in the strontium vapour laser has been solved.Some proposals are presented for further developments of strontium halide lasers.     

Interference nature of light

Interference of light has been reinvestigated theoretically by linear superposition of two different state-vector functions, of which each describes the photons from one of two different light sources in both polarization and intensity. By the use of microscopic parameters for a photon, namely probability amplitude and phase, it is again validated that interference of light occurs only between the same photons possessing a set of the selfsame eigenvalues.     

锶蒸气M-M跃迁激光

通过在锶蒸气和氦混合气体中的高重复率脉冲放电,同时获得了锶原子4条谱线的激光振荡,它们对应于复三能级4d·³D_3,2,1与5p·³P⁰_2,1,0之间的多谱线跃迁,其波长分别为292μm,301μm,269μm和260μm.除了301μm激光外,均为首次报道.激光平均功率合计约10mW,相互之间的强度比为5∶4∶4∶1.在分析了相关能级特征和实验现象的基础上,对其作用机理进行了初步的探讨,建议将其分 关键词： 锶蒸气激光 自终止 M-M跃迁     

锶蒸气中原子激光与离子激光的同时振荡

通过锶蒸气中的高频脉冲放电,实现了锶原子6.45μm自终止跃迁激光和锶离子1.03μm/1.09μm自终止跃迁激光的同时振荡.其中6.45μm激光最大激光平均功率为273mW.在对比实验的基础上分析和讨论了主要工作参数对这两组激光输出影响的差异.     

Alternate oscillations of self-terminating and recombination lasers in univalent calcium and strontium ions

The univalent calcium and strontium ions have been confirmed as ideal lasing substances both for self-terminating laser and recombination laser by theoretically analysing their energy level structures and lasing mechanisms. With the optimization of the excitation circuit and the improvement of the laser cavity as well as the laser discharge tube, thealternate laser oscillatlons of the two laser mechanisms were suceessfully realized by longitudinal pulsed discharge in mixture vapours of helium and univalent ions of calcium or strontium, respectively. The dependences of laser performance on working parameters, together with the characteristics of the photoelectric pulse waveforms were elementally studied and analysed.     

放电激励的Ca+共振亚稳跃迁激光器的研究

理论上从分析Ca+的能级结构着手,确认其是一种很好的共振亚稳跃迁激光工作物质.实验上以氖为缓冲气体,在内径为12.9mm,电极间距为45cm的石英放电管中,获得了平均功率为406mW,功率密度为6.9mW/cm3的红外共振亚稳跃迁激光输出.测量了一些参量之间的关系,分析了Ca+红外激光的工作特性 关键词：     

钙离子自终止激光和复合激光同时振荡的研究

理论上分析了钙离子红外自终止激光和紫外复合激光存在同时振荡的可靠性,通过改进实验装置,首次获得钙离子的红外和紫外激光的同时振荡,二束激光输出总平均功率约70mW,其中红外和和紫外激光约各占一半。比较了不同谐振腔对激光输出特性的影响,测量并分析了激励电脉冲与所产生二束激光脉冲波形的关系。