IR laser oscillation on caesium and rubidium atomic transitions upon pumping to high-lying energy levels

IF 0.9 4区 工程技术 Q3 Engineering
A. Babin, M. Volkov, S. Garanin, S. A. Kovaldov, A. V. Kopalkin, F. Starikov, A. Strakhov, V. Feoktistov
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Abstract

Laser oscillation is obtained in caesium and rubidium atoms with wavelengths in the range of 2 – 5.5 μm under pumping to high-lying energy levels. Longitudinal resonant pumping is implemented using the second harmonic of radiation from an optical parametric oscillator. The pump wavelength is tuned over discrete levels from 8P to 10P in caesium atoms and from 6P to 8P in rubidium atoms. The width of the pump radiation spectrum is 12 cm−1. When caesium atoms are pumped, the pump pulse energy is no more than 10 mJ; when rubidium atoms are pumped, it does not exceed 3 mJ. The pulse repetition rate is 10 Hz. The maximum output energy of IR laser radiation upon pumping the 9P3/2 level of caesium atoms is about 100 μJ at a cell temperature of ∼170°C, while the efficiency of pump conversion into radiation energy with a wavelength λ ∼ 3.1 μm turns out to be ∼1 %. For rubidium atoms, an estimate of the output energy of IR radiation gives a value of ∼80 μJ at a cell temperature of 180 °C, which corresponds to an energy efficiency of ∼2.7 %.
红外激光振荡对铯和铷原子跃迁泵浦到高能级
在高能级泵浦下,波长在2 ~ 5.5 μm范围内的铯和铷原子产生了激光振荡。纵向谐振泵浦是利用光参量振荡器辐射的二次谐波实现的。泵浦波长在不同的能级上调谐,从铯原子的8P到10P,从铷原子的6P到8P。泵浦辐射光谱宽度为12cm−1。抽运铯原子时,抽运脉冲能量不大于10 mJ;当铷原子被泵送时,它不超过3mj。脉冲重复频率为10hz。在电池温度为~ 170℃时,泵浦9P3/2能级铯原子的最大输出能量约为100 μJ,而泵浦转化为波长为λ ~ 3.1 μm的辐射能的效率为~ 1%。对于铷原子,在180°C的电池温度下,红外辐射的输出能量估计为~ 80 μJ,相当于能量效率为~ 2.7%。
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来源期刊
Quantum Electronics
Quantum Electronics 工程技术-工程:电子与电气
CiteScore
3.00
自引率
11.10%
发文量
95
审稿时长
3-6 weeks
期刊介绍: Quantum Electronics covers the following principal headings Letters Lasers Active Media Interaction of Laser Radiation with Matter Laser Plasma Nonlinear Optical Phenomena Nanotechnologies Quantum Electronic Devices Optical Processing of Information Fiber and Integrated Optics Laser Applications in Technology and Metrology, Biology and Medicine.
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