Ultrafast idasanzwe laser igice cya mbere

Ntibisanzweultrafast laserigice cya mbere

Imiterere yihariye ya ultrafastlaseri
Ultra-ngufi ya pulse igihe cyigihe cya ultrafast itanga sisitemu yihariye itandukanya na ndende-ndende cyangwa ikomeza-umuyaga (CW). Kugirango habeho kubyara impiswi ngufi, ubugari bwagutse burasabwa. Imiterere ya pulse hamwe nuburebure bwo hagati bugena umurongo ntarengwa ukenewe kugirango ubyare impiswi zigihe runaka. Mubisanzwe, iyi mibanire isobanurwa mubijyanye nigicuruzwa cyagutse (TBP), gikomoka kumahame adashidikanywaho. TBP ya pulse ya Gaussian itangwa na formula ikurikira: TBPGaussian = ΔτΔν≈0.441
Δτ nigihe impiswi yamara na Δv numuyoboro mugari. Mubusanzwe, ikigereranyo cyerekana ko hari isano itandukanye hagati yumurongo wa interineti nigihe cyigihe, bivuze ko uko igihe impiswi igabanuka, umurongo mugari usabwa kugirango izo mpyisi ziyongere. Igishushanyo cya 1 cyerekana umurongo ntarengwa usabwa kugirango ushyigikire ibihe bitandukanye.

Igishushanyo 1: Umuyoboro muto ntarengwa usabwa kugirango ushyigikirelaser pulsesya 10 ps (icyatsi), 500 fs (ubururu), na 50 fs (umutuku)

Ibibazo bya tekinike ya ultrafast laseri
Umuyoboro mugari, imbaraga za mpinga, hamwe nigihe gito cya pulse ya ultrafast laseri igomba gucungwa neza muri sisitemu. Akenshi, kimwe mubisubizo byoroshye kubibazo ni ubugari bwagutse bwa laseri. Niba warakoresheje cyane cyane impiswi ndende cyangwa ikomeza-umurongo wa lazeri mugihe cyashize, ububiko bwawe bwibikoresho bya optique ntibushobora kwerekana cyangwa kohereza umurongo wuzuye wa ultrafast pulses.

Inzira yangiritse
Ultrafast optique nayo ifite itandukaniro ritandukanye kandi biragoye kugendana ibyangiritse (LDT) ugereranije nibisanzwe bya laser. Iyo optique yatanzwenanosekondIndangagaciro za LDT mubisanzwe ziri murutonde rwa 5-10 J / cm2. Kuri ultrafast optique, indangagaciro zubu bunini ntizigeze zumvikana, kuko indangagaciro za LDT zishobora kuba ziri kuri gahunda ya <1 J / cm2, mubisanzwe hafi ya 0.3 J / cm2. Itandukaniro rinini rya LDT amplitude mugihe cyigihe gitandukanye nigisubizo cyuburyo bwo kwangiza laser bushingiye kumara igihe. Kuri laseri ya nanosekond cyangwa ndendelaseri, uburyo nyamukuru butera ibyangiritse ni ubushyuhe bwumuriro. Igipfundikizo na substrate ibikoresho byaibikoresho byizagukuramo fotone yibyabaye no kubishyushya. Ibi birashobora kugoreka ibintu bya kristu ya kirisiti. Kwiyongera k'ubushyuhe, guturika, gushonga hamwe na lattice ni uburyo busanzwe bwo kwangiza ubushyuhe bwibiInkomoko.

Nyamara, kuri ultrafast laseri, impiswi yamara ubwayo irihuta kurenza igihe cyogukwirakwiza ubushyuhe kuva kuri lazeri kugera kuri lattice yibikoresho, bityo rero ubushyuhe bwumuriro ntabwo arimpamvu nyamukuru yangiza laser. Ahubwo, imbaraga zo hejuru ya laser ya ultrafast ihindura uburyo bwo kwangirika muburyo butari umurongo nko kwinjiza fotone nyinshi na ionisation. Niyo mpamvu bidashoboka kugabanya gusa igipimo cya LDT ya pulse ya nanosekond kugeza kuri ultrafast, kuko uburyo bwumubiri bwangiritse buratandukanye. Kubwibyo, mubihe bimwe byo gukoresha (urugero, uburebure bwumurongo, igihe impiswi yamara, nigipimo cyo gusubiramo), igikoresho cya optique gifite igipimo cyiza cya LDT kizaba igikoresho cyiza cya optique kubisabwa byihariye. Optics yageragejwe mubihe bitandukanye ntabwo ihagarariye imikorere nyayo ya optique imwe muri sisitemu.

Igishushanyo 1: Uburyo bwa laser bwateje ibyangiritse hamwe nibihe bitandukanye