The paper presents the experimental and theoretical evaluation of sensitivity of the copper bromide vapor brightness amplifier (l=50 cm; d=3.2 cm). The research was performed in two experimental modes: Single-Pass brightness amplifier system and the Master oscillator Power Amplifier (MOPA) system. The dependencies of the gain factor (K) and the output signal power (POUT) on the input signal power (PIN) are shown. The input signal power was wearied from 2 μW to 200 mW. The results show that the minimal input signal power, which can be amplified, is (0.001÷0.010) % of ASE power.
{"title":"Sensitivity of copper bromide vapor brightness amplifier","authors":"N. Vasnev, M. Trigub, G. Evtushenko","doi":"10.1117/12.2616473","DOIUrl":"https://doi.org/10.1117/12.2616473","url":null,"abstract":"The paper presents the experimental and theoretical evaluation of sensitivity of the copper bromide vapor brightness amplifier (l=50 cm; d=3.2 cm). The research was performed in two experimental modes: Single-Pass brightness amplifier system and the Master oscillator Power Amplifier (MOPA) system. The dependencies of the gain factor (K) and the output signal power (POUT) on the input signal power (PIN) are shown. The input signal power was wearied from 2 μW to 200 mW. The results show that the minimal input signal power, which can be amplified, is (0.001÷0.010) % of ASE power.","PeriodicalId":372449,"journal":{"name":"XV International Conference on Pulsed Lasers and Laser Applications","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121313769","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}
S. Bobrovnikov, V. Zharkov, A. Nadeev, D. Trifonov
{"title":"Analysis of the efficiency of methods for retrieval of vertical profile of atmospheric temperature from molecular scattering at the main lidar of the Siberian lidar station","authors":"S. Bobrovnikov, V. Zharkov, A. Nadeev, D. Trifonov","doi":"10.1117/12.2616676","DOIUrl":"https://doi.org/10.1117/12.2616676","url":null,"abstract":"","PeriodicalId":372449,"journal":{"name":"XV International Conference on Pulsed Lasers and Laser Applications","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123767648","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}
The influence of the structure of the electrodes on the attainment of the maximum pulse repetition rates and the level of the average radiation power in TEA–N2 lasers is studied. It is shown that the use of sectioned cathodes promotes the formation of volumetric discharges at increased pulse repetition rates. The use of a cathode structure in the form of a set of pins with individual excitation of volume discharges in each gap, together with the use of preliminary ionization of gas mixtures by VUV radiation, ensures that the maximum pulse repetition rates of up to 10–12 kHz in N2:He mixtures are achieved. The maximum average radiation power of 6 W was achieved at a pulse repetition rate of 5 kHz for an N2:He mixture with an optimal component ratio of 30:730 at a total pressure of 760 Torr..
{"title":"TEA-N2 laser with a high level of average radiation power","authors":"B. Kozlov, D. S. Makhanko, A. Y. Payurov","doi":"10.1117/12.2613562","DOIUrl":"https://doi.org/10.1117/12.2613562","url":null,"abstract":"The influence of the structure of the electrodes on the attainment of the maximum pulse repetition rates and the level of the average radiation power in TEA–N2 lasers is studied. It is shown that the use of sectioned cathodes promotes the formation of volumetric discharges at increased pulse repetition rates. The use of a cathode structure in the form of a set of pins with individual excitation of volume discharges in each gap, together with the use of preliminary ionization of gas mixtures by VUV radiation, ensures that the maximum pulse repetition rates of up to 10–12 kHz in N2:He mixtures are achieved. The maximum average radiation power of 6 W was achieved at a pulse repetition rate of 5 kHz for an N2:He mixture with an optimal component ratio of 30:730 at a total pressure of 760 Torr..","PeriodicalId":372449,"journal":{"name":"XV International Conference on Pulsed Lasers and Laser Applications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125177513","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}
G. Kokhanenko, Y. Balin, A. Borovoi, M. Klemasheva, S. Nasonov, M. Novoselov, I. Penner, S. Samoilova
{"title":"Application of polarization lidars to study the orientation of crystalline particles in ice clouds","authors":"G. Kokhanenko, Y. Balin, A. Borovoi, M. Klemasheva, S. Nasonov, M. Novoselov, I. Penner, S. Samoilova","doi":"10.1117/12.2607545","DOIUrl":"https://doi.org/10.1117/12.2607545","url":null,"abstract":"","PeriodicalId":372449,"journal":{"name":"XV International Conference on Pulsed Lasers and Laser Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133549188","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}
The paper presents analysis results of large aperture stretcher schemes for use in laser systems after pre-amplification stages. To increase output peak power in the two-channel femtosecond laser system with coherent field combining, developed at ILP SB RAS, a stretcher for deployment in front of additional amplification stages is required. The stretcher and additional stages will boost pulse energy in a channel up to 1.5 J. Since beam energy at stretcher input is 100-150 mJ, beam diameter exceeds 20 mm what, is determined by damage thresholds of stretcher elements. With a stretching ratio of 10 and such an aperture, aberrational distortions of the stretcher obstruct further compression, focusing, and effective coherent combining of amplified pulses. Optimized parameters of the off-axis and off-plane Offner stretchers allow pulse stretching to 2.1 ns (spectrally limited duration ~20 fs and carrier wavelength 0.83 μm) and subsequent recompression down to 24 fs and 35 fs in a beam with 20 mm aperture.
{"title":"Large aperture stretchers for high intensity laser systems","authors":"D. Shvydkoy, V. Trunov","doi":"10.1117/12.2613632","DOIUrl":"https://doi.org/10.1117/12.2613632","url":null,"abstract":"The paper presents analysis results of large aperture stretcher schemes for use in laser systems after pre-amplification stages. To increase output peak power in the two-channel femtosecond laser system with coherent field combining, developed at ILP SB RAS, a stretcher for deployment in front of additional amplification stages is required. The stretcher and additional stages will boost pulse energy in a channel up to 1.5 J. Since beam energy at stretcher input is 100-150 mJ, beam diameter exceeds 20 mm what, is determined by damage thresholds of stretcher elements. With a stretching ratio of 10 and such an aperture, aberrational distortions of the stretcher obstruct further compression, focusing, and effective coherent combining of amplified pulses. Optimized parameters of the off-axis and off-plane Offner stretchers allow pulse stretching to 2.1 ns (spectrally limited duration ~20 fs and carrier wavelength 0.83 μm) and subsequent recompression down to 24 fs and 35 fs in a beam with 20 mm aperture.","PeriodicalId":372449,"journal":{"name":"XV International Conference on Pulsed Lasers and Laser Applications","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123033773","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}
O. Tchaikovskaya, E. Bocharnikova, N. Bezlepkina, I. Lysak, T. Malinovskaya, G. Lysak
The effect of UV radiation on the efficiency phototransformation BPA in water in the presence of polypropylene superfine microfibers. The absorption and fluorescence spectra of the investigated substance with three types of PPM of various properties were obtained. After excitation with an excilamp, the main photoproduct BPA fluoresces in the region of 405 ÷410 nm. With an increase in the irradiation time from 0 to 10 minutes, an increase in the fluorescence intensity of this BPA photoproduct was recorded. This indicates that in the course of irradiation, effective photodegradation of the initial toxicant occurs and a photoproduct is formed. In the course of irradiation, the degradation of the resulting photoproducts occurs, which is associated with their adsorption on the surface of the PPM.
{"title":"Photodegradation of bisphenol A in the presence of superfine microfiber polypropylene","authors":"O. Tchaikovskaya, E. Bocharnikova, N. Bezlepkina, I. Lysak, T. Malinovskaya, G. Lysak","doi":"10.1117/12.2593831","DOIUrl":"https://doi.org/10.1117/12.2593831","url":null,"abstract":"The effect of UV radiation on the efficiency phototransformation BPA in water in the presence of polypropylene superfine microfibers. The absorption and fluorescence spectra of the investigated substance with three types of PPM of various properties were obtained. After excitation with an excilamp, the main photoproduct BPA fluoresces in the region of 405 ÷410 nm. With an increase in the irradiation time from 0 to 10 minutes, an increase in the fluorescence intensity of this BPA photoproduct was recorded. This indicates that in the course of irradiation, effective photodegradation of the initial toxicant occurs and a photoproduct is formed. In the course of irradiation, the degradation of the resulting photoproducts occurs, which is associated with their adsorption on the surface of the PPM.","PeriodicalId":372449,"journal":{"name":"XV International Conference on Pulsed Lasers and Laser Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129706767","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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