Pub Date : 1992-12-31DOI: 10.1070/QE1992V022N12ABEH003683
O. Lyubomudrov, V. Shkunov
The problem of propagation of a light beam with speckle in a photorefractive crystal with diffusive photoresponse is solved analytically. While the angular spectrum of the beam remains Gaussian, the beam is deflected, with a rate of rotation proportional to the square of the divergence angle.
{"title":"NONLINEAR-OPTICS PHENOMENA AND DEVICES: Self-deflection of the path of a light beam in a photorefractive crystal","authors":"O. Lyubomudrov, V. Shkunov","doi":"10.1070/QE1992V022N12ABEH003683","DOIUrl":"https://doi.org/10.1070/QE1992V022N12ABEH003683","url":null,"abstract":"The problem of propagation of a light beam with speckle in a photorefractive crystal with diffusive photoresponse is solved analytically. While the angular spectrum of the beam remains Gaussian, the beam is deflected, with a rate of rotation proportional to the square of the divergence angle.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82440425","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 : 1992-11-30DOI: 10.1070/QE1992V022N11ABEH003647
L. Losev, V. Soskov
We have experimentally implemented the following laser-oscillator scheme for a Ti:sapphire laser system: mode-locked operation of an Nd:YAG laser, stimulated-Raman-scattering (SRS) pulse compression in SF6, frequency doubling in a KDP crystal, and copropagating SRS in hydrogen. This system transforms a single 30-ps pulse at a wavelength of 1.06 μm with an energy of 3 mJ into a 300-fs pulse at 0.76 μm with an energy of 100 μJ.
{"title":"A 300-fs stimulated-Raman laser oscillator for the Ti:sapphire laser","authors":"L. Losev, V. Soskov","doi":"10.1070/QE1992V022N11ABEH003647","DOIUrl":"https://doi.org/10.1070/QE1992V022N11ABEH003647","url":null,"abstract":"We have experimentally implemented the following laser-oscillator scheme for a Ti:sapphire laser system: mode-locked operation of an Nd:YAG laser, stimulated-Raman-scattering (SRS) pulse compression in SF6, frequency doubling in a KDP crystal, and copropagating SRS in hydrogen. This system transforms a single 30-ps pulse at a wavelength of 1.06 μm with an energy of 3 mJ into a 300-fs pulse at 0.76 μm with an energy of 100 μJ.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75066492","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 : 1992-11-30DOI: 10.1070/QE1992V022N11ABEH003664
V. Maslennikov, V. Sychugov, A. Tishchenko, B. A. Usievich
A laser structure consisting of two active films on a common substrate with a higher refractive index is proposed. The films are coupled by radiation modes through their common substrate. Dispersion curves are found for such structures. The distance over which there is a complete pumping of energy from one waveguide to another is found as a function of the substrate thickness. Generation has been achieved in a structure consisting of two polymethyl methacrylate films activated by the dye rhodamine 6G on a lithium niobate substrate with two external mirrors.
{"title":"Light generation in a system of two coupled waveguides","authors":"V. Maslennikov, V. Sychugov, A. Tishchenko, B. A. Usievich","doi":"10.1070/QE1992V022N11ABEH003664","DOIUrl":"https://doi.org/10.1070/QE1992V022N11ABEH003664","url":null,"abstract":"A laser structure consisting of two active films on a common substrate with a higher refractive index is proposed. The films are coupled by radiation modes through their common substrate. Dispersion curves are found for such structures. The distance over which there is a complete pumping of energy from one waveguide to another is found as a function of the substrate thickness. Generation has been achieved in a structure consisting of two polymethyl methacrylate films activated by the dye rhodamine 6G on a lithium niobate substrate with two external mirrors.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81696199","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 : 1992-11-30DOI: 10.1070/QE1992V022N11ABEH003667
Y. Troitskiĭ
A dispersionless multiple-beam interferometer with a small distance between mirrors is described. The phase characteristics of the mirrors are chosen in such a way that the resonance condition depends only weakly on the frequency of the light, while a high sensitivity to displacement of the mirrors is retained. It thus becomes possible to significantly relax the requirements on the spectral width and frequency stability of the laser light source.
{"title":"Interferometer for measuring ultrasmall displacements with a nonmonochromatic light source","authors":"Y. Troitskiĭ","doi":"10.1070/QE1992V022N11ABEH003667","DOIUrl":"https://doi.org/10.1070/QE1992V022N11ABEH003667","url":null,"abstract":"A dispersionless multiple-beam interferometer with a small distance between mirrors is described. The phase characteristics of the mirrors are chosen in such a way that the resonance condition depends only weakly on the frequency of the light, while a high sensitivity to displacement of the mirrors is retained. It thus becomes possible to significantly relax the requirements on the spectral width and frequency stability of the laser light source.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86809038","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 : 1992-11-30DOI: 10.1070/QE1992V022N11ABEH003645
V. Zuev, G. Kashnikov, S. B. Mamaev
We have investigated the spatial, temporal, and spectral characteristics of a XeF laser in the visible region (0.48 μm) and the UV region (0.35 μm). We have determined experimentally the dependence of the output energy on the vapor pressure of the original XeF2 gas for various configurations of the optical pumping source and various resonator Q factors. Output energies of 117 and 174 J, respectively, were achieved on the C–A and B–X transitions of the XeF molecule, with internal efficiencies of 2.6% and 3.6%. We studied the directivity of the output from the XeF (C–A) laser as photolysis waves of various shapes were generated in the active media. The output wavelength in the visible region of the spectrum can be tuned. We investigated the emission characteristics of segmented high-current open surface discharges as a function of the rate of energy deposition in the plasma in the working medium of the XeF laser.
{"title":"XEF LASER WITH OPTICAL PUMPING BY SURFACE DISCHARGES","authors":"V. Zuev, G. Kashnikov, S. B. Mamaev","doi":"10.1070/QE1992V022N11ABEH003645","DOIUrl":"https://doi.org/10.1070/QE1992V022N11ABEH003645","url":null,"abstract":"We have investigated the spatial, temporal, and spectral characteristics of a XeF laser in the visible region (0.48 μm) and the UV region (0.35 μm). We have determined experimentally the dependence of the output energy on the vapor pressure of the original XeF2 gas for various configurations of the optical pumping source and various resonator Q factors. Output energies of 117 and 174 J, respectively, were achieved on the C–A and B–X transitions of the XeF molecule, with internal efficiencies of 2.6% and 3.6%. We studied the directivity of the output from the XeF (C–A) laser as photolysis waves of various shapes were generated in the active media. The output wavelength in the visible region of the spectrum can be tuned. We investigated the emission characteristics of segmented high-current open surface discharges as a function of the rate of energy deposition in the plasma in the working medium of the XeF laser.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88881456","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 : 1992-11-30DOI: 10.1070/QE1992V022N11ABEH003662
Y. Andreev, S. D. Velikanov, A. S. Yerutin, A. F. Zapol'skii, D. Konkin, S. Mishkin, S. Smirnov, Yu. N. Frolov, V. V. Shchurov
We have succeeded in generating the second harmonic of the radiation from a DF laser for the first time, using single crystals of ZnGeP2. For crystals with lengths of 10.1 and 13.6 mm, the overall external efficiencies of the entire oscillator system were 4 and 6.2%. The internal efficiencies of second-harmonic generation in the crystals were 7.6 and 11.8%, respectively.
{"title":"NONLINEAR OPTICS PHENOMENA: Second harmonic generation from DF laser radiation in ZnGeP2","authors":"Y. Andreev, S. D. Velikanov, A. S. Yerutin, A. F. Zapol'skii, D. Konkin, S. Mishkin, S. Smirnov, Yu. N. Frolov, V. V. Shchurov","doi":"10.1070/QE1992V022N11ABEH003662","DOIUrl":"https://doi.org/10.1070/QE1992V022N11ABEH003662","url":null,"abstract":"We have succeeded in generating the second harmonic of the radiation from a DF laser for the first time, using single crystals of ZnGeP2. For crystals with lengths of 10.1 and 13.6 mm, the overall external efficiencies of the entire oscillator system were 4 and 6.2%. The internal efficiencies of second-harmonic generation in the crystals were 7.6 and 11.8%, respectively.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89097407","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 : 1992-11-30DOI: 10.1070/QE1992V022N11ABEH003659
V. Sedov, M. Y. Nikiforov, G. A. Al’per
We have measured the reflection coefficients and threshold pump energies for phase conjugation via stimulated Brillouin scattering (SBS) in various chemical compounds and binary solutions. We have studied the possibility of controlling the parameters of SBS phase conjugation by purely chemical means.
{"title":"Effect of properties of binary solutions of nonelectrolytes on the parameters of stimulated Brillouin scattering","authors":"V. Sedov, M. Y. Nikiforov, G. A. Al’per","doi":"10.1070/QE1992V022N11ABEH003659","DOIUrl":"https://doi.org/10.1070/QE1992V022N11ABEH003659","url":null,"abstract":"We have measured the reflection coefficients and threshold pump energies for phase conjugation via stimulated Brillouin scattering (SBS) in various chemical compounds and binary solutions. We have studied the possibility of controlling the parameters of SBS phase conjugation by purely chemical means.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80352228","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 : 1992-11-30DOI: 10.1070/QE1992V022N11ABEH003669
S. M. Dolotov, M. Koldunov, A. Manenkov, G. Roskova, N. Sitnikov, N. E. Khaplanova, T. S. Tsekhomskaya
The resistance to laser damage and the microhardness of a composite material based on a polymer and a porous glass have been studied. The microhardness is good, and the damage resistance high. The characteristics of a passive Q switch fabricated from this material are reported.
{"title":"Composite material based on a polymer and a porous glass for fabricating laser components","authors":"S. M. Dolotov, M. Koldunov, A. Manenkov, G. Roskova, N. Sitnikov, N. E. Khaplanova, T. S. Tsekhomskaya","doi":"10.1070/QE1992V022N11ABEH003669","DOIUrl":"https://doi.org/10.1070/QE1992V022N11ABEH003669","url":null,"abstract":"The resistance to laser damage and the microhardness of a composite material based on a polymer and a porous glass have been studied. The microhardness is good, and the damage resistance high. The characteristics of a passive Q switch fabricated from this material are reported.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80487927","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 : 1992-11-30DOI: 10.1070/QE1992V022N11ABEH003651
N. Kravtsov, N. Naumkin
A study has been made of how a static external electric field affects the output of a stimulated-Raman-scattering laser using compressed hydrogen. The external field substantially influences the energy distribution among the higher-index components of the stimulated emission. At a qualitative level, this effect can be explained on the basis that a dipole moment is induced in the hydrogen molecule and that a transition from the first vibrational level to the ground state becomes allowed.
{"title":"Effect of a static electric field on the output of a stimulated-Raman hydrogen laser","authors":"N. Kravtsov, N. Naumkin","doi":"10.1070/QE1992V022N11ABEH003651","DOIUrl":"https://doi.org/10.1070/QE1992V022N11ABEH003651","url":null,"abstract":"A study has been made of how a static external electric field affects the output of a stimulated-Raman-scattering laser using compressed hydrogen. The external field substantially influences the energy distribution among the higher-index components of the stimulated emission. At a qualitative level, this effect can be explained on the basis that a dipole moment is induced in the hydrogen molecule and that a transition from the first vibrational level to the ground state becomes allowed.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73832014","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 : 1992-11-30DOI: 10.1070/QE1992V022N11ABEH003663
A. V. Mamaev, V. Shkunov
We show theoretically and experimentally that the optimum geometry for phase conjugation of speckle beams in a loop containing a photorefractive crystal is the biting-its-own-tail geometry with beam diameter preserved. We predict an increase in the threshold for the process by a factor of 1.5 due to the introduction of speckle in the beam to be conjugated.
{"title":"NONLINEAR OPTICS PHENOMENA: Self-conjugation of a speckle pump beam in a loop containing a photorefractive crystal","authors":"A. V. Mamaev, V. Shkunov","doi":"10.1070/QE1992V022N11ABEH003663","DOIUrl":"https://doi.org/10.1070/QE1992V022N11ABEH003663","url":null,"abstract":"We show theoretically and experimentally that the optimum geometry for phase conjugation of speckle beams in a loop containing a photorefractive crystal is the biting-its-own-tail geometry with beam diameter preserved. We predict an increase in the threshold for the process by a factor of 1.5 due to the introduction of speckle in the beam to be conjugated.","PeriodicalId":21878,"journal":{"name":"Soviet Journal of Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81996602","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}
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