Intense terahertz pulses and a process of second harmonic generation are promising methods for exciting and studying an ultrafast dynamic response in magnetically ordered systems, ferroelectrics, and multiferroics on the picosecond time scale. In the present work, we report experimental results on generation of second optical harmonic in centrosymmetric antiferromagnetic NiO induced by intense terahertz pulses with an electric field strength of up to 20 MV cm−1.
{"title":"Study of second optical harmonic generation in terahertz pulse-induced antiferromagnetic NiO","authors":"O. Chefonov, A. Ovchinnikov, M. Agranat","doi":"10.1070/qel17996","DOIUrl":"https://doi.org/10.1070/qel17996","url":null,"abstract":"Intense terahertz pulses and a process of second harmonic generation are promising methods for exciting and studying an ultrafast dynamic response in magnetically ordered systems, ferroelectrics, and multiferroics on the picosecond time scale. In the present work, we report experimental results on generation of second optical harmonic in centrosymmetric antiferromagnetic NiO induced by intense terahertz pulses with an electric field strength of up to 20 MV cm−1.","PeriodicalId":20775,"journal":{"name":"Quantum Electronics","volume":"466 1","pages":"269 - 273"},"PeriodicalIF":0.9,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82721289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. M. Pershin, A. I. Vodchits, I. Khodasevich, V. Orlovich, A. Kudryavtseva, N. V. Tcherniega
We report, for the first time to our knowledge, suppression of backward stimulated Raman scattering (BSRS) of picosecond pulses (57 ps, 532 nm) due to the development of optical breakdown in the surface (0 – 3 mm) water layer with a shift of the beam waist (lens focal length of 83 mm) to the water – air interface without changing the pump pulse energy (∼1.3 – 1.5 mJ). In this case, SRS generation in forward direction is observed even in the presence of breakdown. When the focal plane coincides with the surface, the BSRS generation is restored without optical breakdown, despite an increase in the pump radiation intensity due to a decrease in the beam diameter. It is significant that the optical breakdown threshold in the water volume was unattainable even with an increase in the pump pulse energy by more than an order of magnitude – up to 16 mJ. The mechanism of self-consistent summation of nonlinear optical processes, such as electrostriction, beam self-focusing, beam phase conjugation, and BSRS pulse compression is discussed.
{"title":"Backward SRS suppression of picosecond pulses in water upon moving the pump beam waist from the water volume through the surface","authors":"S. M. Pershin, A. I. Vodchits, I. Khodasevich, V. Orlovich, A. Kudryavtseva, N. V. Tcherniega","doi":"10.1070/qel18005","DOIUrl":"https://doi.org/10.1070/qel18005","url":null,"abstract":"We report, for the first time to our knowledge, suppression of backward stimulated Raman scattering (BSRS) of picosecond pulses (57 ps, 532 nm) due to the development of optical breakdown in the surface (0 – 3 mm) water layer with a shift of the beam waist (lens focal length of 83 mm) to the water – air interface without changing the pump pulse energy (∼1.3 – 1.5 mJ). In this case, SRS generation in forward direction is observed even in the presence of breakdown. When the focal plane coincides with the surface, the BSRS generation is restored without optical breakdown, despite an increase in the pump radiation intensity due to a decrease in the beam diameter. It is significant that the optical breakdown threshold in the water volume was unattainable even with an increase in the pump pulse energy by more than an order of magnitude – up to 16 mJ. The mechanism of self-consistent summation of nonlinear optical processes, such as electrostriction, beam self-focusing, beam phase conjugation, and BSRS pulse compression is discussed.","PeriodicalId":20775,"journal":{"name":"Quantum Electronics","volume":"10 1","pages":"283 - 288"},"PeriodicalIF":0.9,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90555405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The pulse duration at the output of femtosecond lasers is usually close to the Fourier limit, and can be shortened by increasing the spectral width. To this end, use is made of self-phase modulation when a pulse propagates in a medium with cubic nonlinearity. Then, the pulse with a chirp (frequency dependence of the spectrum phase) is compressed due to a linear dispersion element, which introduces a chirp of the same modulus, but opposite in sign. This pulse post-compression, known since the 1960s, has been widely used and is being developed up to the present for pulses with energies from fractions of a nJ to tens of J. The review is devoted to the theoretical foundations of this method, problems of energy scaling, and a discussion of the results of more than 150 experimental studies.
{"title":"Post-compression of femtosecond laser pulses using self-phase modulation: from kilowatts to petawatts in 40 years","authors":"E. Khazanov","doi":"10.1070/qel18001","DOIUrl":"https://doi.org/10.1070/qel18001","url":null,"abstract":"The pulse duration at the output of femtosecond lasers is usually close to the Fourier limit, and can be shortened by increasing the spectral width. To this end, use is made of self-phase modulation when a pulse propagates in a medium with cubic nonlinearity. Then, the pulse with a chirp (frequency dependence of the spectrum phase) is compressed due to a linear dispersion element, which introduces a chirp of the same modulus, but opposite in sign. This pulse post-compression, known since the 1960s, has been widely used and is being developed up to the present for pulses with energies from fractions of a nJ to tens of J. The review is devoted to the theoretical foundations of this method, problems of energy scaling, and a discussion of the results of more than 150 experimental studies.","PeriodicalId":20775,"journal":{"name":"Quantum Electronics","volume":"6 1","pages":"208 - 226"},"PeriodicalIF":0.9,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86116897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Garanin, Y. Dolgopolov, G. N. Kachalin, A. V. Kopalkin, S. M. Kulikov, S. N. Pevnyi, F. Starikov, S. A. Sukharev
A two-channel double-pass iodine explosively pumped photodissociation laser (EPPL) with an explosively pumped master oscillator (MO) and an SBS mirror is studied. The radiation source, determined by an aperture 6 mm in diameter, through which the radiation from MO enters the turbulent surface air path, is located at a distance of 2.5 km from the amplifier unit input. An SBS mirror with a kinoform raster of microlenses is used to compensate for the amplifier and path optical inhomogeneities and to match the phases in the EPPL channels. The energy and spatial characteristics of the EPPL output radiation are studied experimentally and numerically. Good agreement is obtained between the experimental and calculated distribution of the energy density of the output EPPL radiation in the plane of the MO aperture, which is a pattern of interference between the two channels. The maximum energy density in the aperture plane is by more than 4 times greater than in the case of a single-channel EPPL.
{"title":"Phase combining of radiation from a two-channel explosively pumped photodissociation iodine laser with an SBS mirror","authors":"S. Garanin, Y. Dolgopolov, G. N. Kachalin, A. V. Kopalkin, S. M. Kulikov, S. N. Pevnyi, F. Starikov, S. A. Sukharev","doi":"10.1070/qel17997","DOIUrl":"https://doi.org/10.1070/qel17997","url":null,"abstract":"A two-channel double-pass iodine explosively pumped photodissociation laser (EPPL) with an explosively pumped master oscillator (MO) and an SBS mirror is studied. The radiation source, determined by an aperture 6 mm in diameter, through which the radiation from MO enters the turbulent surface air path, is located at a distance of 2.5 km from the amplifier unit input. An SBS mirror with a kinoform raster of microlenses is used to compensate for the amplifier and path optical inhomogeneities and to match the phases in the EPPL channels. The energy and spatial characteristics of the EPPL output radiation are studied experimentally and numerically. Good agreement is obtained between the experimental and calculated distribution of the energy density of the output EPPL radiation in the plane of the MO aperture, which is a pattern of interference between the two channels. The maximum energy density in the aperture plane is by more than 4 times greater than in the case of a single-channel EPPL.","PeriodicalId":20775,"journal":{"name":"Quantum Electronics","volume":"96 1","pages":"289 - 295"},"PeriodicalIF":0.9,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87685379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents a retrospective analysis of the development of notions in nonlinear optics: from beam self-focusing and pulse filamentation to light bullets – wave packets extremely compressed in space and time during laser light propagation in the bulk of a transparent medium. We describe the state of the art in studies of mid-IR light bullets in condensed media and air.
{"title":"Light bullets in transparent dielectrics","authors":"V.P. Kandidov, E.D. Zaloznaya, A.E. Dormidonov, V.O. Kompanets, S.V. Chekalin","doi":"10.1070/qel18000","DOIUrl":"https://doi.org/10.1070/qel18000","url":null,"abstract":"This paper presents a retrospective analysis of the development of notions in nonlinear optics: from beam self-focusing and pulse filamentation to light bullets – wave packets extremely compressed in space and time during laser light propagation in the bulk of a transparent medium. We describe the state of the art in studies of mid-IR light bullets in condensed media and air.","PeriodicalId":20775,"journal":{"name":"Quantum Electronics","volume":"86 ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138514197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Apparently, the concept of ‘nonlinear optics’ was first introduced by S.I. Vavilov when analysing the results of absorption saturation in uranium glasses obtained in 1926. In particular, he noted that “In an absorbing medium ‘nonlinearity’ should be observed not only in relation to absorption. The latter is related to dispersion, so the speed of light propagation in a medium, generally speaking, must also depend on the light power”. One of the defining criteria for nonlinear optics, according to S.I. Vavilov, is the violation of the superposition principle. Sixteen years later, in 1942, E. SchrÖdinger, considering the problem of light scattering by electrons, also defined the processes as nonlinearly optical. Nonlinear optics, as an independent branch of physics, dates back to the work by Franken et al. in 1961, when the generation of the second harmonic of ruby laser radiation was obtained at an extremely low efficiency (~10–12) in terms of the number of photons: only 106 second harmonic photons. But already in 1962, second harmonic generation was realised in the phase-matched regime with a conversion efficiency that was several orders of magnitude higher. Then, literally within a few years, it was possible to obtain effective generation of the third and fourth harmonics and of the sum frequency, to implement parametric amplification and generation, and to observe stimulated Raman scattering, two-photon absorption, and other nonlinear effects. The works of Pockels, Kerr, Faraday and others, performed back in the 19th century, turned out to be the basis for understanding the essence of the effects observed, and research on nonlinear optics itself became a logical continuation of work on radiophysics, nonlinear electrodynamics of the microwave range, optics, hydrodynamics and acoustics, the theory of oscillations, etc. As with many other branches of physics, it is difficult to give an exact definition of nonlinear optics by specifying its boundaries. In 1965 one of the founders of nonlinear optics, R.V. Khokhlov, divided nonlinear wave processes into two groups: dispersive and nondispersive, in each of which these effects are possible in reactive and absorbing media. Such a definition does not raise the question that nonlinear optical processes are possible only under high-intensity irradiation, which is not infrequently done even today. R. Boyd adheres to the same approach in his 2020 monograph, with clarification for parametric and nonparametric processes in dispersive media. It is difficult to say to what extent the existing definitions correspond to the problems of nonlinear optics of tomorrow, but even now the rapid development of quantum nonlinear optics clearly indicates the importance of nonlinear optical processes occurring with single quanta, i.e., in the regime of extremely low intensities. Research in the field of nonlinear optics is carried out by many teams of scientists around the world. An invaluable contribution to the formation a
显然，“非线性光学”的概念是由S.I. Vavilov在分析1926年获得的铀玻璃的吸收饱和度结果时首先引入的。他特别指出，“在吸收介质中，‘非线性’不仅应该在吸收方面被观察到。后者与色散有关，因此光在介质中的传播速度，一般来说也必须取决于“光功率”。根据S.I.瓦维洛夫的说法，非线性光学的定义标准之一是违反叠加原理。16年后的1942年，E. SchrÖdinger考虑到电子散射光的问题，也将这一过程定义为非线性光学。非线性光学作为物理学的一个独立分支，可以追溯到1961年Franken等人的工作，当时以极低的效率(~ 10-12)获得了红宝石激光辐射的二次谐波的产生，就光子数量而言，只有106个二次谐波光子。但早在1962年，二次谐波产生就在相位匹配状态下实现了，转换效率提高了几个数量级。然后，在短短几年内，就有可能获得第三次和第四次谐波以及和频率的有效产生，实现参数放大和产生，并观察受激拉曼散射，双光子吸收和其他非线性效应。波克尔斯、克尔、法拉第等人早在19世纪就完成的工作，为理解所观察到的效应的本质奠定了基础，对非线性光学本身的研究成为辐射物理学、微波范围的非线性电动力学、光学、流体力学和声学、振荡理论等工作的合乎逻辑的延续。与物理学的许多其他分支一样，通过指定非线性光学的边界来给它一个精确的定义是很困难的。1965年，非线性光学的创始人之一R.V. Khokhlov将非线性波过程分为两组:色散和非色散，在每一组中，这些效应在反应介质和吸收介质中都是可能的。这样的定义并没有提出非线性光学过程只有在高强度照射下才可能发生的问题，即使在今天，这种情况也并不罕见。R. Boyd在他2020年的专著中坚持了同样的方法，澄清了分散介质中的参数和非参数过程。很难说现有的定义在多大程度上与未来的非线性光学问题相对应，但即使是现在，量子非线性光学的迅速发展也清楚地表明，单量子非线性光学过程的重要性，即在极低强度的情况下。非线性光学领域的研究是由世界各地的许多科学家团队进行的。非线性波动过程理论的形成和发展是由N. Blombergen, d . Kleinman, J. a . Armstrong, R. Byer, J. Ducuing, P.S. Pershan和许多其他人做出的宝贵贡献。在苏联，20世纪50年代末在R.V. Khokhlov和S.A. Akhmanov领导下形成的科学学派在很大程度上决定了我国非线性光学的发展。非线性光学的关键任务之一是激光辐射的频率转换，这大大扩展了激光器的功能。这使得确保在宽波长范围内有效产生辐射成为可能:从软x射线(由于产生高谐波)到毫米和太赫兹(由于光学精流)辐射，其脉冲持续时间在光学范围内降至几飞秒，在x射线范围内的脉冲时间缩短了一个数量级，峰值功率为几PW。变频激光器的应用领域非常广泛。这些是光谱学、环境监测、诊断、医学、各种类型的材料加工、信息和电信系统，包括量子光学和量子计算等问题。在新的定性分析能力框架内，在研究快速流动过程，寻找“失去的时间”方面取得了重大进展。然而，非线性光学仍有许多尚未解决的基本问题，其中很大一部分与激光和非线性光学技术的发展有关。这些，特别是，包括理论和实验研究的问题在现代量子电动力学的结合点:极化和非线性真空及其击穿的激光辐射的作用下的极端强度。非线性光学的研究一直是《量子电子学》杂志最重要和最实际的课题之一。 本期发表的论文并不能反映现代非线性光学的所有科学领域，在俄罗斯，许多科学团体都在积极地研究这一领域。我们要对所有投稿的论文作者表示深深的感谢。但是，由于本刊收到的关于该主题的论文数量超过了一期可能发表的论文总量，因此部分论文将在下期发表。六十年的非线性光学
{"title":"Sixty years of nonlinear optics","authors":"S. Grechin, A. Savel’ev","doi":"10.1070/QEL18010","DOIUrl":"https://doi.org/10.1070/QEL18010","url":null,"abstract":"Apparently, the concept of ‘nonlinear optics’ was first introduced by S.I. Vavilov when analysing the results of absorption saturation in uranium glasses obtained in 1926. In particular, he noted that “In an absorbing medium ‘nonlinearity’ should be observed not only in relation to absorption. The latter is related to dispersion, so the speed of light propagation in a medium, generally speaking, must also depend on the light power”. One of the defining criteria for nonlinear optics, according to S.I. Vavilov, is the violation of the superposition principle. Sixteen years later, in 1942, E. SchrÖdinger, considering the problem of light scattering by electrons, also defined the processes as nonlinearly optical. Nonlinear optics, as an independent branch of physics, dates back to the work by Franken et al. in 1961, when the generation of the second harmonic of ruby laser radiation was obtained at an extremely low efficiency (~10–12) in terms of the number of photons: only 106 second harmonic photons. But already in 1962, second harmonic generation was realised in the phase-matched regime with a conversion efficiency that was several orders of magnitude higher. Then, literally within a few years, it was possible to obtain effective generation of the third and fourth harmonics and of the sum frequency, to implement parametric amplification and generation, and to observe stimulated Raman scattering, two-photon absorption, and other nonlinear effects. The works of Pockels, Kerr, Faraday and others, performed back in the 19th century, turned out to be the basis for understanding the essence of the effects observed, and research on nonlinear optics itself became a logical continuation of work on radiophysics, nonlinear electrodynamics of the microwave range, optics, hydrodynamics and acoustics, the theory of oscillations, etc. As with many other branches of physics, it is difficult to give an exact definition of nonlinear optics by specifying its boundaries. In 1965 one of the founders of nonlinear optics, R.V. Khokhlov, divided nonlinear wave processes into two groups: dispersive and nondispersive, in each of which these effects are possible in reactive and absorbing media. Such a definition does not raise the question that nonlinear optical processes are possible only under high-intensity irradiation, which is not infrequently done even today. R. Boyd adheres to the same approach in his 2020 monograph, with clarification for parametric and nonparametric processes in dispersive media. It is difficult to say to what extent the existing definitions correspond to the problems of nonlinear optics of tomorrow, but even now the rapid development of quantum nonlinear optics clearly indicates the importance of nonlinear optical processes occurring with single quanta, i.e., in the regime of extremely low intensities. Research in the field of nonlinear optics is carried out by many teams of scientists around the world. An invaluable contribution to the formation a","PeriodicalId":20775,"journal":{"name":"Quantum Electronics","volume":"9 1","pages":"207 - 207"},"PeriodicalIF":0.9,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79523537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Kinyaevskiy, V. Kovalev, A. Koribut, Y. Grudtsyn, L. Seleznev, E. Dunaeva, A. Ionin
We report an experimental study of SRS of chirped 40-ps Ti : sapphire laser pulses with a transform-limited duration of 0.35 ps and centre wavelength of 925 nm in BaWO4 crystals. The highest generation efficiency for the ∼925 cm−1 shifted Stokes signal of SRS by the ν 1 vibrational mode of BaWO4 crystals has been reached using three sequentially located crystals with a total length of 3.3 cm. The position of the crystals after a focusing mirror has been optimised, which has ensured a pump-to-Stokes conversion efficiency of ∼50 % in terms of spectral brightness and ∼20 % in terms of pulse energy.
{"title":"Efficient SRS of chirped Ti : sapphire laser pulses in BaWO4 crystals","authors":"I. Kinyaevskiy, V. Kovalev, A. Koribut, Y. Grudtsyn, L. Seleznev, E. Dunaeva, A. Ionin","doi":"10.1070/qel18002","DOIUrl":"https://doi.org/10.1070/qel18002","url":null,"abstract":"We report an experimental study of SRS of chirped 40-ps Ti : sapphire laser pulses with a transform-limited duration of 0.35 ps and centre wavelength of 925 nm in BaWO4 crystals. The highest generation efficiency for the ∼925 cm−1 shifted Stokes signal of SRS by the ν 1 vibrational mode of BaWO4 crystals has been reached using three sequentially located crystals with a total length of 3.3 cm. The position of the crystals after a focusing mirror has been optimised, which has ensured a pump-to-Stokes conversion efficiency of ∼50 % in terms of spectral brightness and ∼20 % in terms of pulse energy.","PeriodicalId":20775,"journal":{"name":"Quantum Electronics","volume":"39 1","pages":"278 - 282"},"PeriodicalIF":0.9,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73778847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Bagayev, S. Garanin, N. Kolachevsky, V. Konov, I. B. Kovsh, Y. Kulchin, V. Panchenko, Yu. M. Popov, G. Rykovanov, A. S. Semenov, A. Sergeev, R. Suris, A. Shalagin, I. Shcherbakov
{"title":"On the ninetieth birthday of O.N. Krokhin","authors":"S. Bagayev, S. Garanin, N. Kolachevsky, V. Konov, I. B. Kovsh, Y. Kulchin, V. Panchenko, Yu. M. Popov, G. Rykovanov, A. S. Semenov, A. Sergeev, R. Suris, A. Shalagin, I. Shcherbakov","doi":"10.1070/qel18009","DOIUrl":"https://doi.org/10.1070/qel18009","url":null,"abstract":"","PeriodicalId":20775,"journal":{"name":"Quantum Electronics","volume":"54 1","pages":"306 - 306"},"PeriodicalIF":0.9,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74043133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Badikov, D. V. Badikov, G. Shevyrdyaeva, V. Laptev, A. A. Melnikov, S. Chekalin
Ba2Ga8GeS16 and Ba2Ga8(GeSe2)S14 single crystals of large size and good optical quality have been grown for the first time. Their linear optical characteristics – transmission spectra in the range of 0.3 – 25 μm, dispersion of principal refractive indices, and birefringence – have been measured. Irradiation of the crystals by 100-fs laser pulses with a wavelength of 8.3 μm initiated second-harmonic generation with an efficiency comparable with that obtained for the AgGaS2 crystal.
{"title":"Optical and generation characteristics of new nonlinear Ba2Ga8GeS16 and Ba2Ga8(GeSe2)S14 crystals for the mid-IR range","authors":"V. Badikov, D. V. Badikov, G. Shevyrdyaeva, V. Laptev, A. A. Melnikov, S. Chekalin","doi":"10.1070/qel17995","DOIUrl":"https://doi.org/10.1070/qel17995","url":null,"abstract":"Ba2Ga8GeS16 and Ba2Ga8(GeSe2)S14 single crystals of large size and good optical quality have been grown for the first time. Their linear optical characteristics – transmission spectra in the range of 0.3 – 25 μm, dispersion of principal refractive indices, and birefringence – have been measured. Irradiation of the crystals by 100-fs laser pulses with a wavelength of 8.3 μm initiated second-harmonic generation with an efficiency comparable with that obtained for the AgGaS2 crystal.","PeriodicalId":20775,"journal":{"name":"Quantum Electronics","volume":"1 1","pages":"296 - 300"},"PeriodicalIF":0.9,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83166055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. V. Vorontsov, S. Garanin, N.A. Egorov, N. Zakharov, R.A. Zorin, V.B. Kolomeets, V.I. Lazarenko, A. Nadezhin, G.N. Nomakonov, K.A. Tulyakov, Yu. N. Frolov
We report the results of experiments on frequency conversion of a Ho : YAG laser beam (wavelength λ ∼ 2.1 μm) into the near-, mid-, and far-IR regions, aimed at expanding the spectral composition of compact multispectral sources of coherent radiation. The experimentally found laser conversion efficiency into the second harmonic reaches 32 % and 54 % in the cw and repetitively pulsed regimes, respectively. The parametric conversion efficiency into the mid-IR range (λ = 3.5 – 5.0 μm) reaches 55 %, while for the far-IR range (λ = 8 – 8.2 μm) it turns out to be 10.5 %.
{"title":"Nonlinear frequency conversion of a Ho :YAG laser beam","authors":"K. V. Vorontsov, S. Garanin, N.A. Egorov, N. Zakharov, R.A. Zorin, V.B. Kolomeets, V.I. Lazarenko, A. Nadezhin, G.N. Nomakonov, K.A. Tulyakov, Yu. N. Frolov","doi":"10.1070/qel18007","DOIUrl":"https://doi.org/10.1070/qel18007","url":null,"abstract":"We report the results of experiments on frequency conversion of a Ho : YAG laser beam (wavelength λ ∼ 2.1 μm) into the near-, mid-, and far-IR regions, aimed at expanding the spectral composition of compact multispectral sources of coherent radiation. The experimentally found laser conversion efficiency into the second harmonic reaches 32 % and 54 % in the cw and repetitively pulsed regimes, respectively. The parametric conversion efficiency into the mid-IR range (λ = 3.5 – 5.0 μm) reaches 55 %, while for the far-IR range (λ = 8 – 8.2 μm) it turns out to be 10.5 %.","PeriodicalId":20775,"journal":{"name":"Quantum Electronics","volume":"97 1","pages":"262 - 268"},"PeriodicalIF":0.9,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80685112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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