-HlukileI-Ultrafast Laseringxenye eyodwa
Izakhiwo ezihlukile ze-ultrafastamachweba
Isikhathi esifushane se-Ultra-esifushane se-Ultrafast Lasers sinikeza lezi zinhlelo ezihlukile ezahlukanisa zisuka kuma-pulse amade noma ama-lasers aqhubekayo (CW) ama-lasers. Ukuze ukhiqize ukushaya okufushane kangaka, i-bandwidth ebanzi ebanzi iyadingeka. Isimo se-pulse kanye ne-wavelength ephakathi nendawo okuthola umkhawulokudonsa omncane okudingekayo ukukhiqiza ama-pulses wesikhathi esithile. Imvamisa, lobu budlelwano buchazwa ngokuya ngomkhiqizo we-Time-bandwidth (TBP), osuselwa emgomeni ongabaza. I-TBP ye-Gaussian Pulse inikezwa yifomula elandelayo: TBPGAussian = ΔΔ≈≈≈0.441
Kuzwakale isikhathi sokushayela kanye ne-ΔV yi-bandwidth yemvamisa. Ngamafuphi, i-equation ikhombisa ukuthi kunobudlelwano obuhlukahlukene phakathi kwe-bandwidth ye-spectrum kanye nesikhathi sokushaya ngamandla, okusho ukuthi ubude be-pulse buncipha, i-bandwidth iyadingeka ukukhiqiza lokho kukhuphuka. Umdwebo u-1 ukhombisa i-bandwidth encane edingekayo ukusekela ubude besikhathi esiningana se-pulse.
Umdwebo 1: Ubuncane be-bandwidth ebonakalayo edingekayo ukusekelaI-Laser pulseskwe-10 PS (eluhlaza okotshani), ama-500 fs (aluhlaza okwesibhakabhaka), kanye nama-50 fs (abomvu)
Izinselelo zezobuchwepheshe ze-Ultrafast Lasers
I-bandwidth ebanzi ye-bandwidth, amandla aphezulu, kanye nesikhathi esifushane sokushaya kwama-lasers we-ultrafast kumele alawulwe kahle ohlelweni lwakho. Imvamisa, esinye sezixazululo ezilula kwalezi zinselelo ukukhishwa okubanzi kwe-lasertrum ebanzi. Uma usebenzisa ngokuyinhloko i-Delse ende noma ama-Lasers aqhubekayo esikhathi esedlule, isitoko sakho esikhona sezakhi ze-optical kungenzeka singakwazi ukukhombisa noma ukudlulisa i-bandwidth egcwele ye-ultrafast pulses.
Umkhawulo womonakalo we-laser
I-Ultrafast Optics futhi ihluke kakhulu futhi kube nzima kakhulu ukuzulazula imibuthalo yomonakalo ye-laser (LDT) uma kuqhathaniswa nemithombo evamile ye-laser. Lapho i-Optics ihlinzekelweI-Nanosecond idonsela ama-lasers, Amanani e-LDT ajwayele ukulandela ngo-5-10 J / CM2. Kwi-Ultrafast Optics, amanani aleli banzi azwakala njalo, njengoba amanani we-LDT kungenzeka abe ngokulandelana kwe- <1 j / cm2, imvamisa eduze kwe-0.3 j / cm2. Ukwehluka okubalulekile kwe-LDT amplitude ngaphansi kwezikhathi ezihlukile kwe-Pulse kungumphumela wendlela yokulimala kwe-laser kususelwa ekuhambeni kwezikhathi. Ama-nanosecond lasers noma ngaphezuluAma-Lasers afakiwe, indlela eyinhloko ebangela ukulimala ukushisa okushisayo. Ukuhlanganiswa nezinto zokwakha ezingezansi zeAmadivayisi we-OpticalHlanganisa izithombe ze-Photon bese uzishisa. Lokhu kungaholela ekuhlanekezelweni kwe-Crystal lattice. Ukunwetshwa okushisayo, ukuqhekeka, ukuncibilika kanye nobunzima be-lattice kuyizindlela ezijwayelekile zokulimala okushisayo kwalokhuImithombo ye-Laser.
Kodwa-ke, ama-lasers e-Ultrafast, ubude be-pulse uqobo bushesha ukwedlula isilinganiso sesikhathi sokudluliswa kokushisa kusuka e-laser kuya endlebeni yezinto ezibonakalayo, ngakho-ke umphumela we-thermal akayona imbangela enkulu yomonakalo owenziwe nge-laser. Esikhundleni salokho, amandla aphezulu we-ultrafast laser aguqula indlela yokulimala ibe izinqubo ezingezona ezifana nokumuncwa kwezithombe eziningi kanye ne-ionization. Lokhu yingakho kungenzeki ukumane kunciphise isilinganiso se-LDT se-nanosecond pumbula kulokho okufuyela kwe-ultrafast, ngoba indlela yokulimala ehlukile. Ngakho-ke, ngaphansi kwemibandela efanayo yokusebenzisa (isib I-Optics ihlolwe ngaphansi kwezimo ezahlukahlukene ayimeleli ukusebenza kwangempela kwe-Optics efanayo ohlelweni.
Umdwebo 1: Izindlela zomonakalo weLaser Olendi Ngezikhathi Ezihlukile Zokushaya
Isikhathi sePosi: Jun-24-2024