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IR laser oscillation on caesium and rubidium atomic transitions upon pumping to high-lying energy levels 红外激光振荡对铯和铷原子跃迁泵浦到高能级
IF 0.9 4区 工程技术 Q3 Engineering Pub Date : 2022-04-01 DOI: 10.1070/qel18021
A. Babin, M. Volkov, S. Garanin, S. A. Kovaldov, A. V. Kopalkin, F. Starikov, A. Strakhov, V. Feoktistov
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 %.
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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引用次数: 0
Comparison of field shifts in an atomic clock based on the effect of coherent population trapping in 87Rb atoms under modulation of laser pump current at frequencies of 3.4 and 6.8 GHz 在3.4 GHz和6.8 GHz激光泵浦电流调制下,基于87Rb原子相干居群捕获效应的原子钟场移比较
IF 0.9 4区 工程技术 Q3 Engineering Pub Date : 2022-04-01 DOI: 10.1070/qel18023
S. Ignatovich, M. Skvortsov, I. Mesenzova, N. L. Kvashnin, V. Vishnyakov, D. Brazhnikov, S. Bagayev
Experimental parameters of the resonance of coherent population trapping (CTP) on D1 line in 87Rb and light shifts are compared under modulation of the laser pump current at frequencies of 3.4 and 6.8 GHz. Reproducibility of the parameters of a laser with a vertical cavity needed for long-term stability of an atomic clock is considered. The instabilities of atomic CPT-clock obtained for 1 s are 1.2 × 10−11 and 3 × 10−12 for frequencies of 3.4 GHz and 6.8 GHz, respectively.
在3.4 GHz和6.8 GHz的激光泵浦电流调制下,比较了87Rb中D1线上相干居群俘获(CTP)共振和光移的实验参数。考虑了原子钟长期稳定所需的垂直腔激光参数的可重复性。在3.4 GHz和6.8 GHz频率下,原子cpt时钟在1 s内的不稳定性分别为1.2 × 10−11和3 × 10−12。
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引用次数: 0
A model for the formation of complex coupling coefficients in a ring resonator of a laser gyroscope 激光陀螺仪环形谐振腔中复杂耦合系数的形成模型
IF 0.9 4区 工程技术 Q3 Engineering Pub Date : 2022-04-01 DOI: 10.1070/QEL18019
E. A. Petrukhin, A. S. Bessonov
A model of the interference of fields from backscattering point sources in a ring optical resonator is presented. Examples of calculations of complex coupling coefficients in ring resonators of laser gyroscopes are given. Comparison of the calculation results with the results of model experiments demonstrates good agreement and makes it possible to determine dissipative and conservative backscattering components of individual resonator mirrors. The possibilities of reducing the dissipative and conservative backscattering components in the process of ring resonator alignment are discussed.
提出了环形光谐振腔中后向散射点源场干涉的模型。给出了激光陀螺仪环形谐振腔复杂耦合系数的计算实例。计算结果与模型实验结果的比较表明,计算结果符合较好,从而可以确定单个谐振镜的耗散和保守后向散射分量。讨论了在环形谐振腔对准过程中减小耗散和保守后向散射分量的可能性。
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引用次数: 0
The Autler – Townes effect, the Rabi frequency, and determination of characteristics of the decay of excited states in the photoionisation scheme of lutetium 奥特勒-汤斯效应、拉比频率和镥光离方案中激发态衰变特性的测定
IF 0.9 4区 工程技术 Q3 Engineering Pub Date : 2022-04-01 DOI: 10.1070/qel18029
A. B. D’yachkov, A. A. Gorkunov, A. V. Labozin, S. Mironov, V. A. Firsov, G. O. Tsvetkov, V. Panchenko
The splitting of the first and second transitions in the lutetium photoionisation scheme is studied in a wide range of laser radiation intensities, and the Rabi frequencies as functions of the radiation intensity are determined. Based on the results, we have obtained the decay branching coefficients of 0.54 and 0.41 for the first and second transitions, respectively.
研究了在大范围激光辐射强度下,镥光电离方案中第一跃迁和第二跃迁的分裂,并确定了辐射强度的函数拉比频率。在此基础上,我们得到了第一跃迁和第二跃迁的衰变分支系数分别为0.54和0.41。
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引用次数: 0
Application of PT-symmetry properties to increase the limiting sensitivity of resonator optical gyroscopes pt对称特性在提高谐振腔光学陀螺仪极限灵敏度中的应用
IF 0.9 4区 工程技术 Q3 Engineering Pub Date : 2022-04-01 DOI: 10.1070/qel18020
E. Shalymov, T. M. Akhmadiev, V. B. Davydov
We propose and describe the use of a system with PT-symmetry properties in resonator optical gyroscopes. It is shown that this makes it possible to increase the limiting sensitivity and does not introduce disadvantages typical of PT-symmetric laser gyroscopes. In the example considered in the paper, the inclusion of a system with PT-symmetry properties in the composition of a resonator optical gyroscope allows one to increase the limiting sensitivity by a factor of 750.
我们提出并描述了一种具有pt对称特性的系统在谐振光学陀螺仪中的应用。结果表明,这可以提高极限灵敏度,并且不会引入pt对称激光陀螺仪的典型缺点。在本文所考虑的例子中,在谐振光学陀螺仪的组成中加入一个具有pt对称特性的系统,可以使其极限灵敏度提高750倍。
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引用次数: 2
Transformation of polarisation singularities in nonlinear mixing of light beams with frequency conversion in a medium with cubic nonlinearity 三次非线性介质中光束非线性混频偏振奇点的变换
IF 0.9 4区 工程技术 Q3 Engineering Pub Date : 2022-03-01 DOI: 10.1070/QEL17998
K. Grigoriev, V. Makarov
We analyse the electric field transverse distributions in light beams with a tripled frequency and with a frequency of 2ω 1 – ω 2, which arise in the bulk of an isotropic cubic-nonlinear medium upon the propagation of nonuniformly polarised beams of fundamental radiation with a multimode transverse structure described by a superposition of Laguerre – Gaussian modes. A relation is found between the total topological indices of the circular polarisation singularity points in the transverse sections of the generated signal beams and the corresponding total indices in the beams of fundamental radiation.
本文分析了三倍频率和2ω 1 - ω 2频率的三倍频光束在各向同性三次非线性介质中传播时的电场横向分布,这些光束具有拉盖尔-高斯模式叠加所描述的多模横向结构。在产生的信号波束的横截面上,发现了圆偏振奇异点的总拓扑指数与基辐射波束中相应的总指数之间的关系。
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引用次数: 0
1.56-to-2.84 μm SRS conversion of chirped pulses of a high-power erbium fibre laser in a methane-filled hollow-core revolver fibre 高功率铒光纤激光器啁啾脉冲在甲烷填充空心芯转轮光纤中的1.56 ~ 2.84 μm SRS转换
IF 0.9 4区 工程技术 Q3 Engineering Pub Date : 2022-03-01 DOI: 10.1070/qel18003
A. Krylov, A. Gladyshev, A. Senatorov, A. Kolyadin, A. Kosolapov, M. Khudyakov, M. Likhachev, I. Bufetov
Single-cascade 1.56-to-2.84 μm SRS conversion is demonstrated in a hollow-core revolver fibre filled with methane at a pressure of 25 atm under pumping by positively chirped pulses of a high-power erbium-doped all-fibre laser. At a maximum pump pulse energy of 34 μJ (average power 3.74 W) and a pump pulse duration of about 260 ps, ultrashort pulses (USPs) with a duration of 110 ps and an energy of 1.33 μJ (average power 133 mW) are achieved at the centre wavelength of 2.84 μm. The gas fibre Raman lasers based on hollow-core fibres with pumping by high-power fibre sources are promising for producing all-fibre systems emitting USPs in the mid-IR range.
在高功率掺铒全光纤激光器的正啁啾脉冲泵浦下,在25 atm的压力下,在充满甲烷的空心芯转轮光纤中,证明了单级联1.56到2.84 μm的SRS转换。在最大泵浦脉冲能量为34 μJ(平均功率3.74 W)、脉冲持续时间约260 ps的情况下,在中心波长2.84 μm处可产生持续时间为110 ps、能量为1.33 μJ(平均功率133 mW)的超短脉冲。基于高功率光纤源泵浦的空心光纤的气体光纤拉曼激光器有望产生在中红外范围内发射USPs的全光纤系统。
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引用次数: 0
Measurements of small optical absorption and scattering coefficients of high-power polarised laser radiation in lithium triborate crystals 高功率偏振激光辐射在三硼酸锂晶体中的小光学吸收和散射系数的测量
IF 0.9 4区 工程技术 Q3 Engineering Pub Date : 2022-03-01 DOI: 10.1070/qel17999
I. Grishchenko, A.K. Vorob’ev, A. Ostapiv, Y. Stirmanov, A. V. Konyashkin, O. Ryabushkin
We present the results of measurements of low optical absorption and scattering coefficients in lithium triborate crystals using the method of piezoelectric resonance laser calorimetry under the action of polarised single-mode laser radiation at wavelengths of 1070 and 532 nm in the power ranges of 50 – 300 and 5 – 50 W, respectively. It is shown that when radiation propagates along the crystal axis a, these coefficients remain constant in the specified power ranges and do not depend on the direction of laser radiation polarisation. The measured optical scattering coefficients are compared with the results obtained by the method of integrating spheres.
本文用压电共振激光量热法测量了三硼酸锂晶体在1070 nm和532 nm的偏振单模激光辐射作用下,在50 ~ 300和5 ~ 50 W的功率范围内的低光吸收和散射系数。结果表明,当辐射沿晶体轴a传播时,这些系数在指定的功率范围内保持恒定,并且不依赖于激光辐射偏振方向。将测量的光学散射系数与积分球法得到的结果进行了比较。
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引用次数: 0
Mid-IR optical parametric oscillation and second harmonic generation of repetitively pulsed output of a fibre-laser pumped Tm3+ :YAP laser in a fan-out periodically poled MgO:LiNbO3 crystal 扇出周期性极化MgO:LiNbO3晶体中光纤激光泵浦Tm3+:YAP激光器重复脉冲输出的中红外参量振荡和二次谐波产生
IF 0.9 4区 工程技术 Q3 Engineering Pub Date : 2022-03-01 DOI: 10.1070/qel18006
O. Antipov, D. Kolker, A. Dobrynin, Yu.A. Getmanovskii, V. V. Sharkov, M. Chuvakova, A. Akhmatkhanov, V. Shur, I. Shestakova, S. Larin
The nonlinear optical frequency conversions of repetitively pulsed output of a 1941-nm Tm3+ : YAP laser pumped by a cw 1670-nm fibre laser are studied experimentally. Both mid-IR optical parametric oscillation (OPO) and second harmonic generation (SHG) are obtained in the same periodically poled MgO : LiNbO3 crystal with a fan-out domain design by tuning the grating period and temperature. The energy conversion efficiency of the degenerate OPO at 3820 – 3970 nm exceeds 43 % at a 0.5 kHz repetition rate, while the energy conversion efficiency of SHG at 970.5 nm reaches 34 %.
实验研究了连续波1670 nm光纤激光器泵浦的1941 nm Tm3+: YAP激光器重复脉冲输出的非线性光频转换。通过调节光栅周期和温度,在扇形结构的周期性极化MgO: LiNbO3晶体中获得了中红外参量振荡(OPO)和二次谐波(SHG)。在0.5 kHz重复频率下,简并OPO在3820 ~ 3970 nm处的能量转换效率超过43%,而SHG在970.5 nm处的能量转换效率达到34%。
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引用次数: 0
Broadband two-dimensional spectrochronography with ultrashort pulses in the mid-infrared 中红外超短脉冲宽带二维光谱测年
IF 0.9 4区 工程技术 Q3 Engineering Pub Date : 2022-03-01 DOI: 10.1070/qel18004
E. A. Stepanov, A.N. Zhdanov, I. V. Savitskii, P. Glek, A. A. Lanin, A. Fedotov, A. Zheltikov
A novel, 2.6-to-10-μm wavelength-tunable laser source of sub-70-fs pulses is combined with mid-IR heterodyne detection to provide a versatile laser platform for broadband two-dimensional Fourier-transform infrared spectrochronography. The mid-infrared laser output serves as both a short-pulse driver and a broadband probe for time-resolved studies of ultrafast molecular coherence, population dynamics, and multimodal energy transfer in a vast class of complex molecular systems.
一种新型的2.6 ~ 10 μm波长可调的亚70 fs脉冲激光源与中红外外差检测相结合,为宽带二维傅里叶变换红外光谱测年提供了一个通用的激光平台。中红外激光输出可作为短脉冲驱动器和宽带探针,用于时间分辨研究超快分子相干性、种群动力学和大量复杂分子系统中的多模态能量转移。
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引用次数: 0
期刊
Quantum Electronics
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