{"id":18033,"date":"2020-07-02T19:17:33","date_gmt":"2020-07-02T19:17:33","guid":{"rendered":"https:\/\/dev.inrs.ca\/towards-lasers-powerful-enough-to-investigate-a-new-kind-of-physics\/"},"modified":"2021-09-28T15:49:11","modified_gmt":"2021-09-28T19:49:11","slug":"vers-des-lasers-assez-puissants-pour-etudier-une-nouvelle-forme-de-physique","status":"publish","type":"post","link":"https:\/\/dev.inrs.ca\/en\/news\/towards-lasers-powerful-enough-to-investigate-a-new-kind-of-physics\/","title":{"rendered":"Towards Lasers Powerful Enough to Investigate a New Kind of Physics"},"content":{"rendered":"\n

In a paper that made the cover of the journal Applied Physics Letters<\/em>, an international team of researchers has demonstrated an innovative technique for increasing the intensity of lasers.<\/strong><\/strong><\/p>\n\n\n\n

<\/div>\n\n\n \n
\n \"Laser\"\n

To generate the shortest possible pulse, the researchers are exploiting the effects of non-linear optics. <\/p>\n<\/div>\n\n\n

This approach, based on the compression of light pulses, would make it possible to reach a threshold intensity for a new type of physics that has never been explored before: quantum electrodynamics phenomena.<\/p>\n\n\n\n

Since the invention of frequency drift amplification in 1985 by Donna Strickland and G\u00e9rard Mourou, laser power has increased phenomenally, to finally reach a limit in the last years. Many research groups are amplifying the energy of the laser to increase its power, but this approach is expensive and requires beams and optics that are very large, more than a metre in size.<\/p>\n\n\n\n

Researchers\u00a0Jean-Claude Kieffer<\/a>\u00a0of the Institut national de la recherche scientifique (INRS), E.\u00a0A. Khazanov of the Institute of Applied Physics of the Russian Academy of Sciences and G\u00e9rard Mourou, Professor Emeritus of the Ecole Polytechnique in France, who was awarded the Nobel Prize in Physics in 2018, have chosen another direction\u00a0to achieve an\u00a0intensity of around 10^23 W\/cm\u00b2. Rather than increasing the energy of the laser, they decrease the pulse duration to only a few femtoseconds. This would keep the system within a reasonable size and keep operating costs down.<\/p>\n\n\n\n

<\/div>\n\n\n\n
\"Professeur
Professor Jean-Claude Kieffer | Photo : Christian Fleury<\/figcaption><\/figure><\/div>\n\n\n\n

To generate the shortest possible pulse, the researchers are exploiting the effects of non-linear optics. \u201cA laser beam is sent through an extremely thin and perfectly homogeneous glass plate. The particular behaviour of the wave inside this solid medium broadens the spectrum and allows for a shorter pulse when it is recompressed at the exit of the plate,\u201d explains Jean-Claude Kieffer, co-author of the study<\/a> published online on 15 June 2020 in the journal Applied Physics Letters<\/em>.<\/p>\n\n\n\n

Installed in the\u00a0Advanced Laser Light Source (ALLS)<\/a>\u00a0facility at INRS, the researchers limited themselves to an energy of 3 joules for a 10-femtosecond pulse, or 300 terawatts (1012<\/sup>W). They plan to repeat the experiment with an energy of 13 joules over 5 femtoseconds, or an intensity of 3 petawatts (1015<\/sup>\u00a0W). \u201cWe would be among the first in the world to achieve this level of power with a laser that has such short pulses,\u201d says Professor Kieffer.<\/p>\n\n\n\n

\u201cIf we achieve very short pulses, we enter relativistic problem classes. This is an extremely interesting direction that has the potential to take the scientific community to new horizons,\u201d says Professor Kieffer. \u201cIt was a very nice piece of work solidifying the paramount potential of this technique,\u201d concludes G\u00e9rard Mourou.<\/p>\n\n\n\n


About the study:<\/strong><\/p>\n\n\n\n

\u201cThin plate compression of a sub-petawatt Ti:Sa laser pulses\u201d<\/a> by S. Yu. Mironov, S. Fourmaux, P. Lassonde, V.\u00a0N.\u00a0Ginzburg, S. Payeur, J.-C. Kieffer, E.\u00a0A. Khazanov, and G. Mourou was published in June 2020 in the journal Applied Physics Letters. They have received financial support from the Natural Sciences and Engineering Research Council of Canada, the Canada Foundation for Innovation, the minist\u00e8re de l\u2019\u00c9conomie et de l\u2019Innovation du Qu\u00e9becand the Ministry of Science and Higher Education of the Russian Federation.<\/p>\n\n\n

\n

Other articles you might be interested in<\/h4>\n
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\n \"Infinitely\n <\/div>\n
\n Infinitely small, infinitely fast<\/a>\n <\/div>\n <\/div>\n <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

In a paper that made the cover of the journal Applied Physics Letters, an international team of researchers has demonstrated an innovative technique for increasing the intensity of lasers. This approach, based on the compression of light pulses, would make it possible to reach a threshold intensity for a new type of physics that has never been explored before: quantum electrodynamics phenomena.<\/p>\n","protected":false},"author":297,"featured_media":12063,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[688],"tags":[],"sectors":[731],"class_list":["post-18033","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-innover-a-linrs-en","sectors-materiaux-en"],"acf":[],"yoast_head":"\nTowards Lasers Powerful Enough to Investigate a New Kind of Physics | INRS<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Towards Lasers Powerful Enough to Investigate a New Kind of Physics | INRS\" \/>\n<meta property=\"og:description\" content=\"In a paper that made the cover of the journal Applied Physics Letters, an international team of researchers has demonstrated an innovative technique for increasing the intensity of lasers. 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