{"id":1537,"date":"2022-01-23T11:53:34","date_gmt":"2022-01-23T11:53:34","guid":{"rendered":"https:\/\/akademperiodyka.org.ua\/en\/?page_id=1537"},"modified":"2022-01-23T11:54:57","modified_gmt":"2022-01-23T11:54:57","slug":"high-efficiency-polymethine-dyes-for-passive-q-switch-and-mode-locking-of-neodymium-lasers","status":"publish","type":"page","link":"https:\/\/akademperiodyka.org.ua\/en\/books\/pavl\/3\/","title":{"rendered":"High-efficiency polymethine dyes for passive Q-switch and mode locking of neodymium lasers"},"content":{"rendered":"
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Alexander A. Ishchenko<\/div>\n
Institute of<\/em> Organic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine<\/em><\/div>\n
ORCID:\u00a0https:\/\/orcid.org\/0000-0003-2722-3944<\/a><\/div>\n
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Yurii L. Slominskii<\/div>\n
Institute of<\/em> Organic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine<\/em><\/div>\n
ORCID:\u00a0https:\/\/orcid.org\/0000-0003-2449-4044<\/a><\/div>\n
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Illia P. Sharanov<\/div>\n
Institute of<\/em> Organic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine<\/em><\/div>\n
ORCID:\u00a0https:\/\/orcid.org\/0000-0002-4327-2482<\/a><\/div>\n
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Pagination: 39-52<\/div>\n
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DOI: https:\/\/doi.org\/10.15407\/akademperiodyka.444.039<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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New polymethine dyes (PD) based on benzene [c, d] indole were synthesized. Their spectral and nonlinear optical characteristics in liquid and polymer media have been studied. It was found that the relaxation times \u03c4 of the excited state of the new PDs are approximately the same as those of the dye 3274y, which is widely used as a passive Q-switch of neodymium lasers with a generation lengthwave of 1.06 \u03bcm. The low sensitivity of \u03c4 to changes in the chemical structure of such PDs indicates that the main contribution to the deactivation of the excited state is made by the benzene [c, d] indole heterocycle. High values \u200b\u200bof the cross section in the range of 1.05-1.08 \u03bcm at low relaxation times allow the studied PD to be easily bleached in lasers at low intensities (about 10 MW\/cm2<\/sup>). It is established that the photostability of the new PD significantly exceeds that for the dye 3274y. This is because they contain a saturated six-membered ring in the polymethine chain, which is much less reactive than the corresponding five-membered ring of dye 3274u with respect to the photoinitiator of free radicals of UV irradiation. It is shown that the efficiency of Q-switching and mode locking of new passive laser shutters is higher than their analogues based on the dye 3274y.<\/p>\n<\/div>\n<\/div>\n

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REFERENCES<\/p>\n

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     <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    Alexander A. Ishchenko Institute of Organic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine ORCID:\u00a0https:\/\/orcid.org\/0000-0003-2722-3944 Yurii L. Slominskii Institute of Organic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine ORCID:\u00a0https:\/\/orcid.org\/0000-0003-2449-4044 Illia P. Sharanov Institute of Organic Chemistry of the National Academy of Sciences of Ukraine, Kyiv, Ukraine ORCID:\u00a0https:\/\/orcid.org\/0000-0002-4327-2482 Pagination: […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":24,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1537","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/akademperiodyka.org.ua\/en\/wp-json\/wp\/v2\/pages\/1537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/akademperiodyka.org.ua\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/akademperiodyka.org.ua\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/akademperiodyka.org.ua\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/akademperiodyka.org.ua\/en\/wp-json\/wp\/v2\/comments?post=1537"}],"version-history":[{"count":3,"href":"https:\/\/akademperiodyka.org.ua\/en\/wp-json\/wp\/v2\/pages\/1537\/revisions"}],"predecessor-version":[{"id":1540,"href":"https:\/\/akademperiodyka.org.ua\/en\/wp-json\/wp\/v2\/pages\/1537\/revisions\/1540"}],"wp:attachment":[{"href":"https:\/\/akademperiodyka.org.ua\/en\/wp-json\/wp\/v2\/media?parent=1537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}