Kuchuluka kwa mphamvu ndi kuchuluka kwa mphamvu ya laser
Kuchuluka kwa mphamvu ndi kuchuluka kwa mphamvu komwe timakudziwa bwino pa moyo wathu watsiku ndi tsiku, kuchuluka komwe timakumana nako kwambiri ndi kuchuluka kwa zinthu, fomula ndi ρ=m/v, ndiko kuti, kuchuluka kwa mphamvu ndi kofanana ndi kulemera komwe kumagawidwa ndi voliyumu. Koma kuchuluka kwa mphamvu ndi kuchuluka kwa mphamvu kwa laser ndizosiyana, apa kumagawidwa ndi dera osati voliyumu. Mphamvu ndi kukhudzana kwathu ndi kuchuluka kwa mphamvu zambiri, chifukwa timagwiritsa ntchito magetsi tsiku lililonse, magetsi adzafunika mphamvu, gawo la mphamvu lapadziko lonse lapansi ndi W, ndiko kuti, J/s, ndi chiŵerengero cha mphamvu ndi nthawi, gawo la mphamvu lapadziko lonse lapansi ndi J. Chifukwa chake kuchuluka kwa mphamvu ndi lingaliro lophatikiza mphamvu ndi kuchuluka, koma apa pali dera la kuwala kwa malo osati voliyumu, mphamvu yogawidwa ndi dera la malo otulutsa ndi kuchuluka kwa mphamvu, ndiko kuti, gawo la mphamvu ndi W/m2, ndipo mumunda wa laser, chifukwa malo owunikira a laser ndi ochepa kwambiri, kotero nthawi zambiri W/cm2 imagwiritsidwa ntchito ngati unit. Kuchuluka kwa mphamvu kumachotsedwa pa lingaliro la nthawi, kuphatikiza mphamvu ndi kuchuluka, ndipo unit ndi J/cm2. Kawirikawiri, ma laser opitilira amafotokozedwa pogwiritsa ntchito kuchuluka kwa mphamvu, pomwema laser ozunguliraakufotokozedwa pogwiritsa ntchito mphamvu yamagetsi ndi mphamvu yamagetsi.
Pamene laser ikugwira ntchito, mphamvu yamagetsi nthawi zambiri imatsimikizira ngati malire owononga, kapena ochotsa, kapena zinthu zina zogwirira ntchito afika. Mzere ndi lingaliro lomwe nthawi zambiri limawonekera pophunzira momwe ma laser amagwirira ntchito ndi zinthu. Pa kafukufuku wa kugunda kwafupi (komwe kungawonedwe ngati gawo la us), kugunda kwafupi (komwe kungawonedwe ngati gawo la ns), komanso ngakhale zida zolumikizirana ndi laser zothamanga kwambiri (ps ndi fs), ofufuza oyambirira nthawi zambiri amagwiritsa ntchito lingaliro la kuchuluka kwa mphamvu. Lingaliro ili, pamlingo wolumikizirana, likuyimira mphamvu yogwira ntchito pa cholinga pa gawo lililonse, pankhani ya laser ya mulingo womwewo, kukambiranaku ndikofunikira kwambiri.
Palinso malire a kuchuluka kwa mphamvu ya jakisoni imodzi ya pulse. Izi zimapangitsanso kuti kuphunzira za kuyanjana kwa laser-matter kukhale kovuta kwambiri. Komabe, zida zoyesera zamasiku ano zikusintha nthawi zonse, m'lifupi mwa pulse, mphamvu imodzi ya pulse, mafupipafupi obwerezabwereza ndi magawo ena akusintha nthawi zonse, ndipo amafunika kuganiziranso za kutulutsa kwenikweni kwa laser mu kusinthasintha kwa mphamvu ya pulse pankhani ya kuchuluka kwa mphamvu kuti muyese, kungakhale kovuta kwambiri. Nthawi zambiri, zitha kuganiziridwa kuti kuchuluka kwa mphamvu komwe kumagawidwa ndi m'lifupi mwa pulse ndi kuchuluka kwa mphamvu yapakati pa nthawi (dziwani kuti ndi nthawi, osati malo). Komabe, n'zoonekeratu kuti mawonekedwe enieni a laser sangakhale amakona anayi, mafunde a sikweya, kapena belu kapena Gaussian, ndipo ena amatsimikiziridwa ndi mawonekedwe a laser yokha, yomwe ili ndi mawonekedwe ambiri.
M'lifupi mwa kugunda kwa mtima nthawi zambiri mumaperekedwa ndi m'lifupi mwa theka la kutalika komwe kumaperekedwa ndi oscilloscope (FWHM), zomwe zimatipangitsa kuwerengera mtengo wa mphamvu kuchokera ku mphamvu yamphamvu, yomwe ndi yayikulu. Kutalika ndi m'lifupi mwa theka loyenera kwambiri kuyenera kuwerengedwa ndi integral, kutalika ndi m'lifupi mwa theka. Palibe kafukufuku watsatanetsatane wokhudza ngati pali muyezo woyenera wodziwira. Pa mphamvu yamphamvu yokha, pochita mawerengedwe, nthawi zambiri zimakhala zotheka kugwiritsa ntchito mphamvu ya kugunda kwa mtima imodzi kuwerengera, mphamvu ya kugunda kwa mtima imodzi/m'lifupi mwa kugunda kwa mtima/malo a malo, yomwe ndi mphamvu yapakati ya malo, kenako kuchulukitsidwa ndi 2, pa mphamvu ya kugunda kwa mtima (kugawa kwa malo ndi kugawa kwa Gauss ndi njira yotere, top-hat sikuyenera kutero), kenako kuchulukitsidwa ndi radial distribution expression, Ndipo mwatha.
Nthawi yotumizira: Juni-12-2024