Pub Date : 1992-07-31DOI: 10.1070/QE1992V022N07ABEH003561
Y. Bychkov, V. Losev, Y. Panchenko
An experimental investigation was made of the phase conjugation of an XeCl laser beam with spectral line widths of 2 and 0.4 pm as a function of the conditions of focusing of the beam in a heptane cell. A phase conjugation efficiency higher than 90% was achieved. It was found that, apart from the stimulated Brillouin scattering (STBS) component, the scattered beam also contained a second component without a frequency shift. Their ratio depended on the geometry used to couple the pump beam into the nonlinear medium and its intensity. Phase conjugation was achieved as a result of STBS.
{"title":"Experimental investigation of the efficiency of phase conjugation of an XeCl laser beam by stimulated Brillouin scattering","authors":"Y. Bychkov, V. Losev, Y. Panchenko","doi":"10.1070/QE1992V022N07ABEH003561","DOIUrl":"https://doi.org/10.1070/QE1992V022N07ABEH003561","url":null,"abstract":"An experimental investigation was made of the phase conjugation of an XeCl laser beam with spectral line widths of 2 and 0.4 pm as a function of the conditions of focusing of the beam in a heptane cell. A phase conjugation efficiency higher than 90% was achieved. It was found that, apart from the stimulated Brillouin scattering (STBS) component, the scattered beam also contained a second component without a frequency shift. Their ratio depended on the geometry used to couple the pump beam into the nonlinear medium and its intensity. Phase conjugation was achieved as a result of STBS.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81954113","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}
Pub Date : 1992-07-31DOI: 10.1070/QE1992V022N07ABEH003560
Yu F Kir'yanov, G. Kochemasov, N. Maslov, I. V. Shestakova
A numerical analysis was made of the influence of aberrations such as coma and astigmatism on the quality of phase conjugation accompanying stimulated Brillouin scattering. It was found that coma appreciably reduces the optical conjugation fidelity, from 0.6 when Δλ0.5 = 0 to 0.2 when Δλ0.5 = 5λ. The presence of astigmatism negligibly influences the phase conjugation quality. In addition, in both cases an increase in aberrations results in a linear rise in the stimulated Brillouin scattering threshold.
{"title":"Numerical analysis of the influence of aberrations such as coma and astigmatism on the quality of phase conjugation accompanying stimulated Brillouin scattering","authors":"Yu F Kir'yanov, G. Kochemasov, N. Maslov, I. V. Shestakova","doi":"10.1070/QE1992V022N07ABEH003560","DOIUrl":"https://doi.org/10.1070/QE1992V022N07ABEH003560","url":null,"abstract":"A numerical analysis was made of the influence of aberrations such as coma and astigmatism on the quality of phase conjugation accompanying stimulated Brillouin scattering. It was found that coma appreciably reduces the optical conjugation fidelity, from 0.6 when Δλ0.5 = 0 to 0.2 when Δλ0.5 = 5λ. The presence of astigmatism negligibly influences the phase conjugation quality. In addition, in both cases an increase in aberrations results in a linear rise in the stimulated Brillouin scattering threshold.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88344885","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}
Pub Date : 1992-06-30DOI: 10.1070/QE1992V022N06ABEH003519
N. N. Il'ichev, A. A. Malyutin, P. Pashinin, S. M. Shpuga
A single-frequency neodymium glass laser was constructed and the longitudinal modes were selected using an LiF crystal containing color centers, which served also as a passive switch. A spectrally selective grating formed in such a switch during laser operation, resulting in spontaneous transformation of an initially wide spectrum into a single-frequency one. An analysis was made of the requirements which components of a single-frequency laser should satisfy and its characteristics were determined.
{"title":"Single-frequency stable neodymium glass laser with a longitudinal mode selector based on an LiF:F2− crystal","authors":"N. N. Il'ichev, A. A. Malyutin, P. Pashinin, S. M. Shpuga","doi":"10.1070/QE1992V022N06ABEH003519","DOIUrl":"https://doi.org/10.1070/QE1992V022N06ABEH003519","url":null,"abstract":"A single-frequency neodymium glass laser was constructed and the longitudinal modes were selected using an LiF crystal containing color centers, which served also as a passive switch. A spectrally selective grating formed in such a switch during laser operation, resulting in spontaneous transformation of an initially wide spectrum into a single-frequency one. An analysis was made of the requirements which components of a single-frequency laser should satisfy and its characteristics were determined.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75257231","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}
Pub Date : 1992-06-30DOI: 10.1070/QE1992V022N06ABEH003524
A. L. Belostotskiĭ, A. Leonov, D. Petrov
Methods for calculations of the contours of homogeneous refracting waveguide lenses, free of the lowest-order aberrations within a given angle in the field of view, are proposed. Descriptions are given of ray-tracing and combined methods for monitoring the operation of lenses. In the calculation of the shapes of the contours and numerical testing of lenses a full allowance is made for the anisotropy of the optical properties of waveguides made of lithium niobate.
{"title":"Homogeneous refracting lenses in anisotropic waveguides","authors":"A. L. Belostotskiĭ, A. Leonov, D. Petrov","doi":"10.1070/QE1992V022N06ABEH003524","DOIUrl":"https://doi.org/10.1070/QE1992V022N06ABEH003524","url":null,"abstract":"Methods for calculations of the contours of homogeneous refracting waveguide lenses, free of the lowest-order aberrations within a given angle in the field of view, are proposed. Descriptions are given of ray-tracing and combined methods for monitoring the operation of lenses. In the calculation of the shapes of the contours and numerical testing of lenses a full allowance is made for the anisotropy of the optical properties of waveguides made of lithium niobate.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73029789","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}
Pub Date : 1992-06-30DOI: 10.1070/QE1992V022N06ABEH003528
I. Vorob'ev, V. Gapontsev, A. Gromov, A. A. Izyneev, A. Onishchenko, P. I. Sadovskii
{"title":"Erratum: Erbium minilaser operating under free-running and Q-switching conditions [Sov. J. Quantum Electron. 20, 1065–1067 (September 1990)]","authors":"I. Vorob'ev, V. Gapontsev, A. Gromov, A. A. Izyneev, A. Onishchenko, P. I. Sadovskii","doi":"10.1070/QE1992V022N06ABEH003528","DOIUrl":"https://doi.org/10.1070/QE1992V022N06ABEH003528","url":null,"abstract":"","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86920217","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}
Pub Date : 1992-06-30DOI: 10.1070/QE1992V022N06ABEH003520
A. Bobrovskii, E. B. Levchenko
It is suggested that a phase-contrast interferometer can be used in combination with a thin layer of a transparent nonlinear medium to narrow the angular distribution of a coherent laser beam. An experimental demonstration is reported of a fourfold increase in the axial brightness of a diverging He–Ne laser beam. A cell containing a liquid crystal and an additional layer, which absorbed partly the laser radiation and heated the liquid crystal, was used as the nonlinear medium. The experiments confirmed enhancement of the brightness of the phase image in the proposed system.
{"title":"Wavefront correction and enhancement of the brightness of a phase image in a system comprising a phase-contrast interferometer and a nonlinear medium","authors":"A. Bobrovskii, E. B. Levchenko","doi":"10.1070/QE1992V022N06ABEH003520","DOIUrl":"https://doi.org/10.1070/QE1992V022N06ABEH003520","url":null,"abstract":"It is suggested that a phase-contrast interferometer can be used in combination with a thin layer of a transparent nonlinear medium to narrow the angular distribution of a coherent laser beam. An experimental demonstration is reported of a fourfold increase in the axial brightness of a diverging He–Ne laser beam. A cell containing a liquid crystal and an additional layer, which absorbed partly the laser radiation and heated the liquid crystal, was used as the nonlinear medium. The experiments confirmed enhancement of the brightness of the phase image in the proposed system.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84608580","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}
Pub Date : 1992-06-30DOI: 10.1070/QE1992V022N06ABEH003505
A. Tulupov
Harmonic generation in double-undulator free-electron lasers is considered. It is based on the resonance of oscillations in the field of the second undulator with a longitudinal magnetic field. It is shown that effective control of the harmonic generation is feasible under these conditions. Only one chosen harmonic is generated and the rest are suppressed. The main undulator parameter is then low.
{"title":"Harmonic generation in double-undulator free-electron lasers","authors":"A. Tulupov","doi":"10.1070/QE1992V022N06ABEH003505","DOIUrl":"https://doi.org/10.1070/QE1992V022N06ABEH003505","url":null,"abstract":"Harmonic generation in double-undulator free-electron lasers is considered. It is based on the resonance of oscillations in the field of the second undulator with a longitudinal magnetic field. It is shown that effective control of the harmonic generation is feasible under these conditions. Only one chosen harmonic is generated and the rest are suppressed. The main undulator parameter is then low.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90993434","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}
Pub Date : 1992-06-30DOI: 10.1070/QE1992V022N06ABEH003506
Y. Bychkov, M. L. Vinnik, M. Makarov
An electric-discharge x-ray preionized XeCl laser operating in an unswitched regime was developed and the dependence of its output characteristics on the pump power was investigated. An output energy per pulse of 15 J was obtained with an efficiency of 2.4% from a 4.3-liter active volume.
{"title":"Large-aperture 15-J unswitched electric-discharge XeCl laser with an output energy 15 J","authors":"Y. Bychkov, M. L. Vinnik, M. Makarov","doi":"10.1070/QE1992V022N06ABEH003506","DOIUrl":"https://doi.org/10.1070/QE1992V022N06ABEH003506","url":null,"abstract":"An electric-discharge x-ray preionized XeCl laser operating in an unswitched regime was developed and the dependence of its output characteristics on the pump power was investigated. An output energy per pulse of 15 J was obtained with an efficiency of 2.4% from a 4.3-liter active volume.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87995071","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}
Pub Date : 1992-06-30DOI: 10.1070/QE1992V022N06ABEH003504
A. Tulupov
A new design of a free-electron laser is suggested in which an additional space-periodic magnetic field (second undulator) is used in addition to the basic undulator. Electron oscillations in the field of the second undulator are in resonance with the cyclotron rotation of particles in a longitudinal magnetic field. This gives rise to a mechanism, which governs the bunching of electrons in the field of a ponderomotive wave. This mechanism can prevail causing significant enhancement of the gain. Under different initial conditions an amplification regime can arise, which is close to a self-resonance when the efficiency can be high.
{"title":"Possibilities for increasing the gain and efficiency in free-electron lasers with a double undulator","authors":"A. Tulupov","doi":"10.1070/QE1992V022N06ABEH003504","DOIUrl":"https://doi.org/10.1070/QE1992V022N06ABEH003504","url":null,"abstract":"A new design of a free-electron laser is suggested in which an additional space-periodic magnetic field (second undulator) is used in addition to the basic undulator. Electron oscillations in the field of the second undulator are in resonance with the cyclotron rotation of particles in a longitudinal magnetic field. This gives rise to a mechanism, which governs the bunching of electrons in the field of a ponderomotive wave. This mechanism can prevail causing significant enhancement of the gain. Under different initial conditions an amplification regime can arise, which is close to a self-resonance when the efficiency can be high.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88101408","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}
Pub Date : 1992-06-30DOI: 10.1070/QE1992V022N06ABEH003514
L. Kaptsov, A. Kudryashov, V. Samarkin, A. Seliverstov
A cavity is suggested for an industrial solid-state laser with a large-aperture adaptive mirror. Theoretical calculations of the basic cavity characteristics are reported. A report is given of the construction of a solid-state laser with the suggested cavity and of an experimental study of its properties.
{"title":"CONTROL OF LASER RADIATION PARAMETERS: Control of parameters of solid-state industrial YAG:Nd3+ laser radiation using methods of adaptive optics. I. Laser cavity with an adaptive mirror","authors":"L. Kaptsov, A. Kudryashov, V. Samarkin, A. Seliverstov","doi":"10.1070/QE1992V022N06ABEH003514","DOIUrl":"https://doi.org/10.1070/QE1992V022N06ABEH003514","url":null,"abstract":"A cavity is suggested for an industrial solid-state laser with a large-aperture adaptive mirror. Theoretical calculations of the basic cavity characteristics are reported. A report is given of the construction of a solid-state laser with the suggested cavity and of an experimental study of its properties.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80336886","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：