Hindura umuvuduko wa pulse ya super-ikomeye ultrashort laser

Hindura umuvuduko wa pulse yasuper-ikomeye ultrashort laser

Lazeri ya ultra ultra-short muri rusange yerekeza kuri laser pulses ifite ubugari bwa pulse ya mirongo na magana ya femtosekond, imbaraga zimpanuka za terawatts na petawatts, kandi ubukana bwurumuri bwibanze burenga 1018 W / cm2. Lazeri ya super ultra-short hamwe nisoko ryayo itanga ingufu za radiyoyasi hamwe nisoko ryinshi ryingufu zifite agaciro kanini mugukoresha mubyerekezo byinshi byubushakashatsi nka fiziki y’ingufu nyinshi, fiziki y’ibice, fiziki ya plasma, fiziki ya kirimbuzi na astrofizike, hamwe n’ibisubizo by’ubushakashatsi bwa siyansi birashobora noneho gukorera inganda zijyanye n’ikoranabuhanga rikomeye, ubuzima bw’ubuvuzi, ingufu z’ibidukikije ndetse n’umutekano w’igihugu. Kuva havumburwa ikoranabuhanga rya chirped pulse amplification tekinoroji mu 1985, havutse bwa mbere watt ku isilasermuri 1996 no kuzuza lazeri ya mbere ya watt 10 ya mbere ku isi muri 2017, intego ya super ultra-short laser mu bihe byashize ahanini yari iyo kugera ku “mucyo mwinshi”. Mu myaka yashize, ubushakashatsi bwerekanye ko mugihe cyo gukomeza super laser pulses, niba umuvuduko wogukwirakwiza umuvuduko wa super ultra-short laser ushobora kugenzurwa, birashobora kuzana ibisubizo kabiri hamwe nimbaraga zimbaraga mubikorwa bimwe na bimwe bifatika, bikaba biteganijwe ko bizagabanya urugero rwa super ultra-shortibikoresho bya laser, ariko kunoza ingaruka zayo murwego rwohejuru rwa laser physics.

Kugoreka kwa pulse imbere ya ultra-ikomeye ultrashort laser
Kugirango ubone imbaraga zimpanuka zingufu nkeya, ubugari bwa pulse bugabanuka kugera kuri 20 ~ 30 femtosekond mugukwirakwiza inyungu. Ingufu za pulse ya lazeri 10-beak-watt ultra-short lazeri ni joules zigera kuri 300, kandi kwangirika kwinshi kurwego rwo gusya compressor ituma urumuri ruri hejuru ya mm 300. Igiti cya pulse gifite ubugari bwa 20 ~ 30 femtosekond ubugari na 300 mm aperture biroroshye gutwara kugoreka kwa spatiotemporal guhuza cyane cyane kugoreka imbere. Igishushanyo 1 (a) cyerekana gutandukanya umwanya-wigihe gito imbere yimpande imbere nicyiciro cyambere cyatewe no gukwirakwiza uruhare rwibiti, naho icyambere cyerekana "spatio-by'agateganyo" ugereranije nicyanyuma. Ibindi nuburyo bugoye cyane "curvature of space-time" yatewe na sisitemu ya lens. FIG. 1. Nkigisubizo, ubukana bwibanze bwumucyo buragabanuka cyane, ntabwo bifasha kumurima ukomeye wo gukoresha super ultra-short laser.

FIG. 1.

Pulse yihuta kugenzura ultra-ikomeyeultrashort laser
Kugeza ubu, ibiti bya Bessel byakozwe na conical superposition yumurongo windege byerekanaga agaciro gakoreshwa murwego rwo hejuru rwa laser physics. Niba urumuri rushyizwe hejuru rushyizweho rufite icyerekezo cya axisymmetric pulse imbere, noneho ubukana bwa geometrike ubukana bwa pake ya X-ray yakozwe nkuko bigaragara ku gishushanyo cya 2 irashobora guhora ari superluminal, ihora subluminal, yihuta cyane, kandi yihuta cyane. Ndetse no guhuza indorerwamo ihindagurika hamwe nicyiciro cyumwanya wumucyo moderi irashobora kubyara imiterere ya spatio-by'agateganyo ya pulse imbere, hanyuma ikabyara umuvuduko ukabije woherejwe. Ingaruka yumubiri yavuzwe haruguru hamwe nubuhanga bwayo bwo guhindura ibintu birashobora guhindura "kugoreka" imbere yimitsi ihinduka "kugenzura" imbere yimitsi, hanyuma ikamenya intego yo guhindura umuvuduko wogukwirakwiza ultra-ikomeye ultra-short laser.

FIG. 2.

Nubwo kuvumbura impyisi imbere kugoreka hakiri kare kuruta super ultra-short laser, yahangayikishijwe cyane no guteza imbere super ultra-short laser. Kuva kera, ntabwo bifasha gusohoza intego nyamukuru ya super ultra-short laser - ultra-high yibanda cyane kumucyo, kandi abashakashatsi bagiye bakora kugirango bahagarike cyangwa bakureho imitekerereze itandukanye. Uyu munsi, iyo "impyisi imbere yo kugoreka" yateye imbere muri "pulse front control", yageze ku kugenzura umuvuduko wo kohereza wa super ultra-short laser, itanga uburyo bushya n'amahirwe mashya yo gukoresha lazeri ya ultra ultra-short muri fiziki yo mu rwego rwo hejuru.