Igice cya mbere cya laser yihuta cyane

Bidasanzwelaser yihuta cyaneIgice cya mbere

Imiterere idasanzwe ya ultrafastimirasire ya laser
Igihe cy'ingufu za laser zihuta cyane giha izi sisitemu imiterere yihariye izitandukanya na laser zihuta cyane cyangwa zihuta cyane (CW). Kugira ngo habeho ingufu nk'izo, hakenewe bandwidth ya wide spectrum. Imiterere ya pulse n'uburebure bw'umurambararo bigena bandwidth ntoya ikenewe kugira ngo habeho ingufu z'igihe runaka. Ubusanzwe, iyi sano isobanurwa hakurikijwe umusaruro wa bandwidth y'igihe (TBP), ikomoka ku ihame ryo kudasobanukirwa. TBP y'ingufu za Gaussian itangwa na formula ikurikira:TBPGaussian=ΔτΔν≈0.441
Δτ ni igihe cy'umuvuduko w'amaraso na Δv ni igihe cy'umuvuduko w'amaraso. Muri make, iki gipimo kigaragaza ko hari isano iri hagati y'umuvuduko w'amaraso wa spectrum n'igihe cy'umuvuduko w'amaraso, bivuze ko uko igihe cy'umuvuduko w'amaraso kigabanuka, umuvuduko w'amaraso ukenewe kugira ngo uwo muvuduko w'amaraso urusheho kwiyongera. Ishusho ya 1 igaragaza umuvuduko w'amaraso muto ukenewe kugira ngo ushyigikire igihe cy'umuvuduko w'amaraso gitandukanye.

Igishushanyo cya 1: Ubunini bw'umurambararo buke bukenewe kugira ngo bushyigikireimitsi ya laserya 10 ps (icyatsi kibisi), 500 fs (ubururu), na 50 fs (umutuku)

Imbogamizi za tekiniki za laser zihuta cyane
Uburyo bworoshye bwo gukoresha ikoranabuhanga rya "wide spectral bandwidth", imbaraga za "peak power", n'igihe gito cyo gukoresha ikoranabuhanga rya "ultra-fast lasers" bigomba gucungwa neza muri sisitemu yawe. Akenshi, kimwe mu bisubizo byoroshye kuri ibi bibazo ni uburyo ikoranabuhanga rya "broad spectrum output" rikoreshwa na "laser". Niba warakoresheje cyane cyane ikoranabuhanga rya "pulse ndende" cyangwa "continuous-wave" mu bihe byashize, ububiko bwawe bw'ibice by'urumuri bushobora kutabasha kugaragaza cyangwa kohereza ikoranabuhanga ryuzuye rya "ultra-fast pulses".

Igipimo cy'ibyangiritse hakoreshejwe laser
Optike ikora vuba cyane kandi ifite uburyo butandukanye cyane kandi bugoye bwo kuyikoresha ugereranije n'amasoko asanzwe ya laser. Iyo optike itanzwe kurilasers za nanosecond pulsed, agaciro ka LDT gakunze kuba hagati ya 5-10 J/cm2. Ku bijyanye n'ikoranabuhanga rigezweho, agaciro k'ubu bunini ntabwo kazwi, kuko agaciro ka LDT gashobora kuba kuri <1 J/cm2, akenshi hafi ya 0.3 J/cm2. Impinduka nini y'uburebure bwa LDT mu gihe cy'impinduka zitandukanye ni ingaruka z'uburyo bwangiritse bwa laser bushingiye ku gihe cy'impinduka. Kuri nanosecond lasers cyangwa igihe kirekire.laser zikoresha pulse, uburyo bw'ingenzi butera kwangirika ni ubushyuhe. Igipfukisho n'ibikoresho bya substrate byaibikoresho by'urumurigukurura fotoni z’ibyabaye no kuzishyushya. Ibi bishobora gutuma icyuma gihindura imiterere y’icyuma gishyushye. Kwaguka k’ubushyuhe, kwangirika, gushonga no gushonga kw’icyuma ni byo bintu bisanzwe byangiza ubushyuhe bw’ibiamasoko ya laser.

Ariko, kuri laser zikora vuba cyane, igihe cyo gutera kw'amajwi ubwacyo cyihuta kurusha igihe cyo kwimura ubushyuhe kuva kuri laser kugera kuri lattice y'ibikoresho, bityo ingaruka z'ubushyuhe si zo mpamvu nyamukuru yo kwangirika guterwa na laser. Ahubwo, imbaraga zo hejuru za laser zikora vuba cyane zihindura uburyo bwo kwangirika mo inzira zitari umurongo nko gufata fotoni nyinshi no gushyiramo ionization. Niyo mpamvu bidashoboka kugabanya gusa igipimo cya LDT cy'ingufu za nanosecond ukakigereranya n'icya ultraspeed pulse, kuko uburyo umubiri wangiritsemo butandukanye. Kubwibyo, mu bihe bimwe byo gukoreshwa (urugero, uburebure bw'umuraba, igihe cyo gutera kw'amajwi, n'igipimo cyo gusubiramo), igikoresho cy'amajwi gifite igipimo cya LDT gihagije kizaba igikoresho cyiza cyane cy'amajwi ku ikoreshwa ryawe ryihariye. Optique yapimwe mu bihe bitandukanye ntabwo igaragaza imikorere nyayo y'ingufu zimwe muri sisitemu.

Igishushanyo cya 1: Uburyo bwo kwangirika guterwa na laser hamwe n'igihe gitandukanye cy'amapilo