{"id":8246,"date":"2024-09-15T19:28:25","date_gmt":"2024-09-15T16:28:25","guid":{"rendered":"https:\/\/quantum-electronics.ru\/en\/?p=8246"},"modified":"2024-09-16T13:50:41","modified_gmt":"2024-09-16T10:50:41","slug":"hreshold-characteristics-of-the-1-56-%e2%86%92-2-84-%ce%bcm-raman-transformation-in-methane-under-broadband-pumping-by-powerful-frequency-modulated-pulses-of-erbium-fiber-source","status":"publish","type":"post","link":"https:\/\/quantum-electronics.ru\/en\/hreshold-characteristics-of-the-1-56-%e2%86%92-2-84-%ce%bcm-raman-transformation-in-methane-under-broadband-pumping-by-powerful-frequency-modulated-pulses-of-erbium-fiber-source\/","title":{"rendered":"Threshold characteristics of the 1.56 \u2192 2.84 \u03bcm Raman transformation in methane under broadband pumping by powerful frequency-modulated pulses of erbium fiber source"},"content":{"rendered":"<p>A. A. Krylov, A. V. Gladyshev, Yu. P. Yatsenko, A. K. Senatorov, A. N. Kolyadin, A. F. Kosolapov, M. M. Khudyakov, M. E. Likhachev, I. A. Bufetov<\/p>\n<ul>\n<li>Fiber Optics Research Center of the Russian Academy of Sciences, Moscow<\/li>\n<\/ul>\n<div class=\"around-button\"><b>Abstract:<\/b> The threshold characteristics of Raman lasing at 2.84 \u03bcm wavelength in a hollow revolver fiber filled with methane are studied as a function of the duration of broadband pump pulses with positive frequency modulation (chirp) at 1.56 \u03bcm wavelength. It was experimentally shown that the average effective Raman gain increases from 0.2 \u00d7 10<sup>\u20132<\/sup> to 3.3 \u00d7 10<sup>\u20132<\/sup> cm\/GW, while the threshold pump intensity decreases from 36 to 1.4 GW\/cm<sup>2<\/sup> with increasing effective pump pulse duration within the range of 10 \u2013 321 ps (and the corresponding dimensionless linear chirp \u223c10 \u2013 300). The analysis of the threshold characteristics showed that the SRS conversion had high degree of non-stationarity even at the maximum width of the pump pulse envelope. According to the results of numerical simulation, the influence of dispersion and self-phase modulation in a hollow fiber contributes to significant increase in the SRS threshold in terms of the energy of the pump pulses, especially for positively chirped pulses with the duration of less than 100 ps.<\/div>\n<div class=\"around-button\"><b>Keywords:<\/b> <i>stimulated Raman scattering, chirped pulse, mid-IR range, hollow fiber, erbium fiber amplifier.<\/i><\/div>\n<div><\/div>\n<div><b>Received:<\/b> 05.12.2022<br \/>\n<b>Revised:<\/b> 08.02.2023<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A. A. Krylov, A. V. Gladyshev, Yu. P. Yatsenko, A. K. Senatorov, A. N. Kolyadin, A. F. Kosolapov, M. M. Khudyakov, M. E. Likhachev, I. A. Bufetov Fiber Optics Research Center of the Russian Academy of Sciences, Moscow Abstract: The threshold characteristics of Raman lasing at 2.84 \u03bcm wavelength in a hollow revolver fiber filled\u2026 <span class=\"read-more\"><a href=\"https:\/\/quantum-electronics.ru\/en\/hreshold-characteristics-of-the-1-56-%e2%86%92-2-84-%ce%bcm-raman-transformation-in-methane-under-broadband-pumping-by-powerful-frequency-modulated-pulses-of-erbium-fiber-source\/\">Read More &raquo;<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8246","post","type-post","status-publish","format-standard","hentry","category-stats"],"_links":{"self":[{"href":"https:\/\/quantum-electronics.ru\/en\/wp-json\/wp\/v2\/posts\/8246","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/quantum-electronics.ru\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/quantum-electronics.ru\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/quantum-electronics.ru\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/quantum-electronics.ru\/en\/wp-json\/wp\/v2\/comments?post=8246"}],"version-history":[{"count":0,"href":"https:\/\/quantum-electronics.ru\/en\/wp-json\/wp\/v2\/posts\/8246\/revisions"}],"wp:attachment":[{"href":"https:\/\/quantum-electronics.ru\/en\/wp-json\/wp\/v2\/media?parent=8246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/quantum-electronics.ru\/en\/wp-json\/wp\/v2\/categories?post=8246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/quantum-electronics.ru\/en\/wp-json\/wp\/v2\/tags?post=8246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}