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Effect of Diffusion Doping of ZnGeP2 with Mg and Ca Atoms on the Optical Properties of Single Crystals 在 ZnGeP2 中扩散掺杂镁原子和钙原子对单晶体光学特性的影响
IF 0.9
Atmospheric and Oceanic Optics Pub Date : 2024-11-26 DOI: 10.1134/S1024856024700763
E. S. Slyunko, N. N. Yudin, V. M. Kalygina, A. I. Knyazkova, M. S. Snegerev, M. M. Zinovev, V. S. Kuznetsov, S. N. Podzyvalov, A. B. Lysenko, A. Yu. Kalsin, A. Sh. Gabdrakhmanov
{"title":"Effect of Diffusion Doping of ZnGeP2 with Mg and Ca Atoms on the Optical Properties of Single Crystals","authors":"E. S. Slyunko,&nbsp;N. N. Yudin,&nbsp;V. M. Kalygina,&nbsp;A. I. Knyazkova,&nbsp;M. S. Snegerev,&nbsp;M. M. Zinovev,&nbsp;V. S. Kuznetsov,&nbsp;S. N. Podzyvalov,&nbsp;A. B. Lysenko,&nbsp;A. Yu. Kalsin,&nbsp;A. Sh. Gabdrakhmanov","doi":"10.1134/S1024856024700763","DOIUrl":"10.1134/S1024856024700763","url":null,"abstract":"<p>The effect of impurity Mg and Ca atoms on the optical breakdown threshold of a nonlinear ZnGeP<sub>2</sub> crystal at a wavelength of 2.097 μm is studied. An impurity was introduced through diffusion doping by sputtering on a ZnGeP<sub>2</sub> substrate followed by annealing in vacuum at a temperature of 750°C for 200 hours. Mg atoms introduced into a single crystal increase the optical breakdown threshold by 31%. When ZnGeP<sub>2</sub> is doped with Ca atoms, the opposite trend is observed. The changes in the optical breakdown threshold are suggested to occur due to the creation of additional channels for energy dissipation of radiative and fast nonradiative relaxation processes through impurity energy levels. This suggestion requires experimental confirmation. An increase in the optical strength of ZnGeP<sub>2</sub> could expand the scope of its applicability.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 4","pages":"562 - 566"},"PeriodicalIF":0.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Expert Assessment of the Accuracy of Determining the Intensities of Vibrational-rotational Lines of Water Vapor in the HITRAN Database in the Range 2500–6500 cm–1 对 HITRAN 数据库中 2500-6500 cm-1 范围内水蒸气振动-旋转谱线强度测定精度的专家评估
IF 0.9
Atmospheric and Oceanic Optics Pub Date : 2024-11-26 DOI: 10.1134/S1024856024700623
I. A. Vasilenko, O. V. Naumenko
{"title":"Expert Assessment of the Accuracy of Determining the Intensities of Vibrational-rotational Lines of Water Vapor in the HITRAN Database in the Range 2500–6500 cm–1","authors":"I. A. Vasilenko,&nbsp;O. V. Naumenko","doi":"10.1134/S1024856024700623","DOIUrl":"10.1134/S1024856024700623","url":null,"abstract":"<p>An expert assessment of the accuracy codes for the intensities of rovibrational transitions of water vapor in the spectral range 2500–6500 cm<sup>–1</sup> of the HITRAN2020 database has been carried out. From comparison with experimental data, the normalization coefficients of the variational calculation by <i>Conway E.K., Gordon I.E., Kyuberis A.A., Polyansky O.L., Tennyson J., Zobov N.F.</i> // J. Quant. Spectrosc. Radiat. Transfer. 2020. V. 241. P. 106711 were determined; for the absorption bands (001)–(000), (020)–(000), (011)–(000), and (110)–(000), they were 1.010, 1.007, 1.013, and 1.030, respectively. Using variational calculations and modeling based on the effective Hamiltonian approach, the analysis of experimental data from the HITRAN2020 database has been carried out, revealing less accurate values. Based on these results, an adjusted list of H<sub>2</sub><sup>16</sup>O absorption lines in the range 2500–6500 cm<sup>–1</sup> has been constructed, which can be useful for natural experiments.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 4","pages":"461 - 468"},"PeriodicalIF":0.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ground-Level Atmospheric Turbulence in the Sayan Solar Observatory in Summer 2023 2023 年夏季萨彦太阳观测站的地面大气湍流
IF 0.9
Atmospheric and Oceanic Optics Pub Date : 2024-11-26 DOI: 10.1134/S1024856024700659
V. V. Nosov, V. P. Lukin, E. V. Nosov, A. V. Torgaev
{"title":"Ground-Level Atmospheric Turbulence in the Sayan Solar Observatory in Summer 2023","authors":"V. V. Nosov,&nbsp;V. P. Lukin,&nbsp;E. V. Nosov,&nbsp;A. V. Torgaev","doi":"10.1134/S1024856024700659","DOIUrl":"10.1134/S1024856024700659","url":null,"abstract":"<p>Estimating the influence of atmospheric turbulence on the quality of astronomical images requires appropriate investigations at the sites of observatories. The results of long-term measurements of the atmospheric turbulence characteristics in the Sayan Solar Observatory (SSO) of the Institute of Solar-Terrestrial Physics, Siberian Branch, Russian Academy of Sciences, in summer 2023 are presented. It is confirmed that the cause of the prevailing direction of local winds appearing in SSO is the temperature mountain-valley gradient between the Sayan Mountains north of the SSO observatory and the valley to the south. A smaller level of the mean intensity of atmospheric turbulence in the SSO compared to the turbulence over a flat terrain in middle latitudes is confirmed. The presence of coherent turbulence in the SSO area is shown, at which the quality of images obtained by optical instruments is improved. New data are obtained for the turbulent scales of temperature and wind speed used in the Monin–Obukhov similarity theory depending on the atmospheric stratification. The results will be useful for specialists in astroclimate and theory of atmospheric turbulence.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 4","pages":"485 - 491"},"PeriodicalIF":0.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Use of the Turbulent Lidar for Aviation Safety 湍流激光雷达在航空安全中的应用
IF 0.9
Atmospheric and Oceanic Optics Pub Date : 2024-11-26 DOI: 10.1134/S1024856024700660
I. A. Razenkov, B. D. Belan, A. V. Mikhal’chishin, G. A. Ivlev
{"title":"The Use of the Turbulent Lidar for Aviation Safety","authors":"I. A. Razenkov,&nbsp;B. D. Belan,&nbsp;A. V. Mikhal’chishin,&nbsp;G. A. Ivlev","doi":"10.1134/S1024856024700660","DOIUrl":"10.1134/S1024856024700660","url":null,"abstract":"<p>Clear air turbulence (CAT) constitutes the highest danger for aviation in the free atmosphere in the altitude range 6–12 km. Intermittence and random localization of CAT in a quiet surrounding air flow significantly restrict possibilities of its forecasting. Creation of systems for remote detection of turbulent zones becomes especially topical with allowance for climate changes and increase in the probability of CAT appearance. Results of turbulence sounding by the BSE-5 UV lidar from the Optik Tu-134 aircraft laboratory are presented. The in-flight experiment was conducted in September 2022 as part of the Arctic exploration program. The lidar recorded zones of moderate turbulence in the lower troposphere where the probability of turbulence is maximum; isolated cases of CAT were also recorded at an altitude of 9 km. The turbulent lidar can be used in practice for remote detection of turbulent zones at altitudes where most commercial flights are carried out. The prospects of ground-based application of the turbulent lidar for solving aviation safety problems during flights in the lower troposphere are also shown. The results of the BSE-5 lidar sounding in winter, when an increase in the intensity of turbulence in the 0.4–1.6-km layer was recorded during the passage of a cold front, are presented.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 4","pages":"492 - 501"},"PeriodicalIF":0.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rossby Wave Breaking in the Stratosphere: Part I—Climatology and Long-Term Variability 平流层中的罗斯比波破裂：第一部分--气候学和长期变异性
IF 0.9
Atmospheric and Oceanic Optics Pub Date : 2024-11-26 DOI: 10.1134/S1024856024700696
O. Yu. Antokhina, A. V. Gochakov, O. S. Zorkaltseva, P. N. Antokhin, V. N. Krupchatnikov
{"title":"Rossby Wave Breaking in the Stratosphere: Part I—Climatology and Long-Term Variability","authors":"O. Yu. Antokhina,&nbsp;A. V. Gochakov,&nbsp;O. S. Zorkaltseva,&nbsp;P. N. Antokhin,&nbsp;V. N. Krupchatnikov","doi":"10.1134/S1024856024700696","DOIUrl":"10.1134/S1024856024700696","url":null,"abstract":"<p>The processes of planetary wave breaking (Rossby Wave Breaking – RWB) significantly contribute to variability in stratospheric circulation. Employing a previously developed method for identifying RWB, adapted for stratospheric circulation, this study analyzes the climatology and long-term variability of RWB processes in the middle stratosphere. The method is based on the analysis of potential vorticity (PV) contour geometry at the 850-K level using ERA5 data within the PV range 0–400 PVU (Potential Vorticity Units) determined based on PV field climatology. It was demonstrated that RWB processes exhibit intraseasonal peculiarities. Most frequently, waves break in the northern regions of East Asia and the Pacific Ocean from October to December and in April to March. In January and February, no areas with prevailing RWB processes were identified. We obtained a statistically significant increase in the number of RWB for the first half of winter (October–December) and for the end of the winter period (March and April). For midwinter (January and February), insignificant negative trends were obtained. The results of this work can be used to analyze the long-term variations in stratospheric circulation and, in particular, the occurrence of stratospheric anomalies preceding sudden stratospheric warmings.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 4","pages":"514 - 521"},"PeriodicalIF":0.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Penning Neon Laser Pumped by a Pulsed Inductive Longitudinal Discharge 由脉冲感应纵向放电泵浦的潘宁氖激光器
IF 0.9
Atmospheric and Oceanic Optics Pub Date : 2024-11-26 DOI: 10.1134/S102485602470074X
A. M. Razhev, D. S. Churkin, R. A. Tkachenko
{"title":"Penning Neon Laser Pumped by a Pulsed Inductive Longitudinal Discharge","authors":"A. M. Razhev,&nbsp;D. S. Churkin,&nbsp;R. A. Tkachenko","doi":"10.1134/S102485602470074X","DOIUrl":"10.1134/S102485602470074X","url":null,"abstract":"<p>Laser radiation in the yellow wavelength range is widely used in ophthalmology due to its effectiveness and unique properties. Commercial medical laser systems existing today have low pulse power and other disadvantages. A yellow neon laser with a wavelength of 585.3 nm can be suggested as alternative. We experimentally study a neon laser pumped by a pulsed inductive longitudinal discharge; a Ne–H<sub>2</sub> gas mixture with various ratios is used as the active medium. The shape and duration of the lasing pulses strongly depend on the ratio Ne : H<sub>2</sub>, providing both single and double pulses with a total duration of 30 to 100 ns (FWHM). The generation energy attains 20 μJ, which corresponds to a pulse power of 200 W. The laser beam cross section is close to a circle in shape; the beam divergence is lower than 2 mrad. In future, an inductive neon laser operating in a pulse-periodic mode with a pulse repetition rate of up to 100 Hz can be used for various applications, including in medicine.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 4","pages":"554 - 557"},"PeriodicalIF":0.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Scaling of Europium Vapor Laser 铕蒸汽激光器的缩放
IF 0.9
Atmospheric and Oceanic Optics Pub Date : 2024-11-26 DOI: 10.1134/S1024856024700775
A. G. Filonov, D. V. Shiyanov, M. V. Trigub
{"title":"Scaling of Europium Vapor Laser","authors":"A. G. Filonov,&nbsp;D. V. Shiyanov,&nbsp;M. V. Trigub","doi":"10.1134/S1024856024700775","DOIUrl":"10.1134/S1024856024700775","url":null,"abstract":"<p>IR lasers are widely used in various fields of science and technology. In this regard, expanding the spectral range and obtaining effective lasing in the IR is an urgent task. The object of our study is an self-terminating Eu laser radiating at a wavelength of 1.76 μm. We study a possibility of increasing the output parameters of this laser by elongating the active zone of a gas discharge tube (GDT). An increase in the GDT volume from 157 to 314 cm<sup>3</sup> at a constant pumping power of 1200 W makes it possible to double the output power and laser efficiency. An average radiation power of 2.5 W was attained for the first time in 1.76 μm line; a maximal efficiency of 0.3% was attained at a pump power of 500 W. After 100 hours of operation, the energy characteristics of the Eu + Ne laser with the active zone of 314 cm<sup>3</sup> in volume show good repeatability, which allows us to conclude a possibility of further increasing the energy characteristics and lifetime of this laser. Our results can be useful in microprocessing of materials and in active optical systems for visualizing fast processes.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 4","pages":"567 - 571"},"PeriodicalIF":0.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Decomposition of the Latitudinal Variation in the Long-Term Average Temperature in the Northern Hemisphere in 1897–2010 Based on Measurements at Weather Stations and Data on Astronomical Insolation 基于气象站测量数据和天文日照数据的 1897-2010 年北半球长期平均气温纬度变化分解图
IF 0.9
Atmospheric and Oceanic Optics Pub Date : 2024-11-26 DOI: 10.1134/S1024856024700726
V. A. Tartakovsky, V. G. Maximov, V. A. Krutikov
{"title":"Decomposition of the Latitudinal Variation in the Long-Term Average Temperature in the Northern Hemisphere in 1897–2010 Based on Measurements at Weather Stations and Data on Astronomical Insolation","authors":"V. A. Tartakovsky,&nbsp;V. G. Maximov,&nbsp;V. A. Krutikov","doi":"10.1134/S1024856024700726","DOIUrl":"10.1134/S1024856024700726","url":null,"abstract":"<p>Air temperature data at weather stations in the Northern Hemisphere and astronomical insolation data were ordered by increasing latitude and analyzed together for different samples between 1897 and 2010. Using a step-by-step regression of the latitudinal variation in the long-term average temperature to a polynomial of astronomical insolation, a latitudinal trend in the temperature determined by the Sun and fluctuating regression residuals, which characterize individual features of data, are identified. The absence of interaction of these components is numerically achieved for any samples. It has been found that the latitudinal trend in the long-term average temperature completely determines the warming and contributes about 82% to the total temperature dispersion in the Northern Hemisphere for available samples. The boundaries of regions where temperatures are above and below the latitudinal trend in the long-term average temperatures reveal known geographic structures, thus verifying the trend.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 4","pages":"538 - 546"},"PeriodicalIF":0.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
UV Nitrogen Laser Pumped by a Pulsed Longitudinal Inductive-Electric Discharge 由脉冲纵向感应放电泵浦的紫外氮激光器
IF 0.9
Atmospheric and Oceanic Optics Pub Date : 2024-11-26 DOI: 10.1134/S1024856024700751
A. M. Razhev, D. S. Churkin, R. A. Tkachenko, I. A. Trunov
{"title":"UV Nitrogen Laser Pumped by a Pulsed Longitudinal Inductive-Electric Discharge","authors":"A. M. Razhev,&nbsp;D. S. Churkin,&nbsp;R. A. Tkachenko,&nbsp;I. A. Trunov","doi":"10.1134/S1024856024700751","DOIUrl":"10.1134/S1024856024700751","url":null,"abstract":"<p>Electric discharge nitrogen lasers are popular sources of UV radiation commonly used in many scientific and practical applications. Up-to-date commercial nitrogen lasers should meet several requirements, such as small overall dimensions, high pulse-to-pulse stability, and long service life. In this work, a nitrogen laser excited by a pulsed longitudinal inductive-electric discharge which meets these criteria is suggested. As a result of the experimental studies, lasing at the wavelengths λ<sub>1</sub> = 337.1 and λ<sub>2</sub> = 357.7 nm is obtained. The generation energy attains 0.67 mJ at a pulse duration of 20 ns (FWHM) and a nitrogen pressure of 7–8 Torr. Nitrogen pumping only by a longitudinal discharge in an experimental setup with similar parameters decreases the lasing energy to 0.4 mJ (at the same pulse duration) at a nitrogen pressure of no higher than 5 Torr. Nitrogen lasers with these radiation parameters can be used in treatment of ophthalmic diseases and tuberculosis.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 4","pages":"558 - 561"},"PeriodicalIF":0.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tunable Alexandrite Laser for Lidar Systems 用于激光雷达系统的可调谐亚历山大激光器
IF 0.9
Atmospheric and Oceanic Optics Pub Date : 2024-11-26 DOI: 10.1134/S1024856024700787
Yu. N. Panchenko, A. V. Puchikin, M. V. Andreev, I. N. Konovalov, E. V. Gorlov
{"title":"Tunable Alexandrite Laser for Lidar Systems","authors":"Yu. N. Panchenko,&nbsp;A. V. Puchikin,&nbsp;M. V. Andreev,&nbsp;I. N. Konovalov,&nbsp;E. V. Gorlov","doi":"10.1134/S1024856024700787","DOIUrl":"10.1134/S1024856024700787","url":null,"abstract":"<p>Development of laser technologies increases requirements for lasers being developed which generate narrow-band radiation at different wavelengths. In view of this, the importance of wavelength-tunable diode and vibronic lasers with broadband amplification circuits increases. A possibility of generating highly coherent radiation in a solid-state alexandrite laser using an original composite cavity which includes an additional external dispersive cavity is confirmed. Conditions for narrow-band (less than 20 pm) radiation generation in this cavity with a possibility of smooth tuning the lasing wavelength in the spectral range 740–780 nm are experimentally studied. Narrow-band lasing in an alexandrite laser with a radiation energy of 30 mJ and a pulse duration of 35 ns is shown. The created compact narrow-band alexandrite laser can be an effective alternative to parametric oscillators (OPO) and Ti:Sapphire lasers in lidar systems operating in the spectral range 700–850 nm.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"37 4","pages":"572 - 575"},"PeriodicalIF":0.9,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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