Canza saurin bugun bugun jini na Laser mai ƙarfi ultrashort

Canza saurin bugun bugun jini nasuper-karfi ultrashort Laser

Super ultra-short lasers gabaɗaya suna magana ne akan bugun laser tare da faɗin bugun jini na dubun da ɗaruruwan femtose seconds, ƙarfin kololuwar terawatts da petawatts, kuma ƙarfin haskensu ya wuce 1018 W/cm2. Super ultra-short Laser da ingantaccen tushen hasken wutar lantarki da babban tushen makamashi yana da ƙimar aikace-aikacen da yawa a cikin mahimman bayanan bincike kamar babban makamashin kimiyyar lissafi, ilimin kimiyyar lissafi, kimiyyar lissafi na plasma, ilimin kimiyyar nukiliya da astrophysics, da fitowar kimiyya. Sakamakon bincike na iya yin amfani da manyan masana'antun fasaha, kiwon lafiya, makamashin muhalli da tsaron tsaron ƙasa. Tun lokacin da aka ƙirƙira fasahar haɓaka bugun bugun jini a cikin 1985, bayyanar bugun watt na farko a duniya.Lasera cikin 1996 da kuma kammala na'urar Laser na farko na 10-beat watt a cikin 2017, babban abin da ya fi mayar da hankali ga babban laser gajere a baya ya kasance don cimma "mafi tsananin haske". A cikin 'yan shekarun nan, bincike ya nuna cewa a karkashin yanayin kiyaye super Laser bugun jini, idan za a iya sarrafa bugun bugun jini gudun super ultra-short Laser, zai iya kawo sau biyu sakamakon tare da rabin kokarin a wasu aikace-aikace na jiki, wanda ake sa ran. don rage sikelin super ultra-shortLaser na'urorin, amma inganta tasirinsa a cikin gwaje-gwajen kimiyyar lissafi na Laser babban filin.

Karɓar bugun bugun jini gaban laser ultrashort ultrashort
Domin samun ƙarfin kololuwa a ƙarƙashin ƙayyadaddun makamashi, an rage girman bugun jini zuwa 20 ~ 30 femtose seconds ta hanyar haɓaka bandwidth riba. Ƙarfin bugun bugun jini na Laser gajere mai tsayi 10-watt na yanzu yana da kusan joules 300, kuma ƙarancin lalacewa kofa na ƙwanƙwasa grating yana sanya buɗaɗɗen katako gabaɗaya sama da 300 mm. Ƙaƙwalwar bugun jini tare da 20 ~ 30 femtosecond bugun jini nisa da 300 mm budewa yana da sauƙi don ɗaukar ɓarnawar haɗin gwiwa na spatiotemporal, musamman ma murdiya na gaban bugun jini. Hoto na 1 (a) yana nuna rarrabuwar sararin samaniya-lokaci na gaban bugun jini da kuma gaba na gaba da ke haifar da tarwatsewar rawar katako, kuma tsohon yana nuna “hankalin sararin samaniya-lokaci” dangane da na ƙarshe. Sauran shine mafi rikitarwa "curvature of space-time" wanda tsarin ruwan tabarau ya haifar. FIG. 1 (b) yana nuna tasirin gaban bugun jini mai kyau, mai karkata bugun jini gaba da lankwasa bugun bugun gaba akan murdiya-lokaci-lokaci na filin haske akan manufa. A sakamakon haka, ƙarfin hasken da aka mayar da hankali ya ragu sosai, wanda ba shi da amfani ga ƙaƙƙarfan aikace-aikacen filin na super ultra-short laser.

FIG. 1 (a) karkatar gaban bugun bugun jini sakamakon prism da grating, da (b) tasirin murdiya gaban bugun jini akan filin haske na lokaci-lokaci akan manufa.

Gudun bugun bugun jini na ultra-karfiultrashort Laser
A halin yanzu, Bessel biams samar da conical superposition na jirgin sama tãguwar ruwa sun nuna darajar aikace-aikace a babban filin Laser kimiyyar lissafi. Idan conically superimposed pulsed bim yana da axisymmetric bugun jini gaba rarraba, sa'an nan geometric cibiyar tsanani na X-ray igiyar ruwa fakitin kamar yadda aka nuna a Figure 2 iya zama akai superluminal, m subluminal, kara superluminal, da decelerated subluminal. Hatta haɗe-haɗen madubi mai lalacewa da nau'in na'ura mai sarrafa haske na sararin samaniya na iya samar da siffa ta lokaci-lokaci na gaban bugun jini, sannan kuma samar da saurin watsawa na sabani. Tasirin jiki na sama da fasahar daidaitawa na iya canza "hargitsi" na gaban bugun jini zuwa "sarrafawa" na gaban bugun jini, sa'an nan kuma gane manufar daidaita saurin watsawa na ultra-karfi ultra-short Laser.

FIG. 2 (a) madaidaicin saurin-fiye da haske, (b) tsayayyen haske na yau da kullun, (c) haɓaka da sauri fiye da haske, da (d) ɓarkewar hasken wuta da aka yi ta babban matsayi suna cikin tsakiyar geometric na yankin babban matsayi.

Duk da cewa gano murdiya gaban bugun jini ya riga ya wuce super ultra-short Laser, an damu sosai tare da haɓakar super ultra-short Laser. Na dogon lokaci, ba shi da amfani ga fahimtar ainihin manufar super ultra-short Laser - ultra-high mayar da hankali haske tsanani, kuma masu bincike sun yi aiki don murkushe ko kawar da daban-daban bugun jini gaba murdiya. A yau, lokacin da "bugu na gaba murdiya" ya ɓullo a cikin "bugu gaban iko", ya cimma ka'idar watsa gudun super ultra-short Laser, samar da sababbin hanyoyin da sababbin dama ga aikace-aikace na super matsananci-gajeren Laser a ciki. high-filin Laser kimiyyar lissafi.