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.     

气体脉冲放电等离子体阻抗的参量研究

在纯净氦气条件下，对高频纵向脉冲放电的等离子体动态阻抗进行了实验研究.测量了放电等离子体阻抗随放电电压、频率以及气体压强之间的变化关系，表明等离子体阻抗随频率和电压的增加而下降，随气压的升高而增大.定性分析了这些宏观参量与等离子体阻抗变化之间的关系，拟合出等离子体阻抗随电压、频率、气压变化的经验公式，并对数值模拟与实验结果进行了比较研究. 关键词： 等离子体阻抗 气体脉冲放电     

脉冲放电激励的钡蒸气激光的研究

设计和制作了新型结构的金属蒸气激光放电管.用钡为激光介质,通过纵向高频快脉冲放电激励,在国内首次实现波长为113μm和150μm的红外钡蒸气激光振荡,激光成分主要集中在150μm这条谱线上,激光输出功率和功率密度分别达12W和333mWcm3.测量并讨论了各工作参量和激光输出特性之间的关系     

掺氢与激励电路对钡蒸气激光输出特性的影响

对用Blumlein电路放电激励的钡蒸气激光在掺氢和不掺氢时的输出特性进行了实验研究 .结果表明 ,用掺氢1 5 %的氖气作缓冲气体能使激光功率增加近 2倍 .在此基础上 ,进一步比较了相互作用电路与Blumlein电路时钡蒸气激光的输出特性 ,发现相互作用电路能显著提高钡蒸气激光的输出功率和效率 ,获得了 3W最大功率和 0 4 %效率的 1 5 μm波长激光输出 .测量并分析了各工作参量与激光功率之间的关系 ,定性解释了掺氢与相互作用电路的作用机理     

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。     

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.     

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.     

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.