Ngaba Uyazi Umahluko Phakathi Kwe-Nanosecond, Picosecond kunye ne-Femtosecond Lasers?

Itekhnoloji yelaser ihambele phambili ngokukhawuleza kwiminyaka embalwa edlulileyo. Ukusuka kwilaser ye-nanosecond ukuya kwilaser ye-picosecond ukuya kwilaser ye-femtosecond, iye yasetyenziswa kancinci kancinci kwimveliso yemizi-mveliso, inika izisombululo kuzo zonke iinkalo zobomi. Kodwa ungakanani ulwazi onalo ngezi ntlobo zintathu zelaser? Masifumanise kunye:

Iinkcazo zeNanosecond, Picosecond, kunye neFemtosecond Lasers

I-laser ye-nanosecond yaqala ukungeniswa kwicandelo lemizi-mveliso ngasekupheleni kweminyaka yoo-1990 njenge-diode-pumped solid-state (DPSS) lasers. Nangona kunjalo, ii-laser zokuqala ezinjalo zazinamandla aphantsi okukhupha ii-watts ezimbalwa kunye nobude bobude be-355nm. Ekuhambeni kwexesha, imakethi yee-laser ze-nanosecond iye yavuthwa, kwaye uninzi lwee-laser ngoku zinexesha lokubetha kwe-pulse kwishumi ukuya kumakhulu ee-nanoseconds.

I-Picosecond laser yi-ultra-short pulse width laser ekhupha ii-pulses ze-picosecond-level. Ezi laser zibonelela nge-ultra-short pulse width, i-adjustable repetition frequency, i-high pulse energy, kwaye zilungele ukusetyenziswa kwi-biomedicine, i-optical parametric oscillation, kunye ne-biological microscopic imaging. Kwiinkqubo zanamhlanje ze-biological imaging and analysis, ii-picosecond lasers ziye zaba zizixhobo ezibaluleke kakhulu.

I-laser ye-Femtosecond yi-laser ye-pulse emfutshane kakhulu enobunzima obuphezulu kakhulu, ebalwa kwi-femtoseconds. Le teknoloji iphucukileyo inike abantu amathuba amatsha ovavanyo angazange abonwe ngaphambili kwaye inezicelo ezibanzi. Ukusetyenziswa kwe-laser ye-femtosecond enamandla kakhulu, etyhalwayo emfutshane ngeenjongo zokufumanisa kuluncedo ngakumbi kwiimpendulo ezahlukeneyo zeekhemikhali, kubandakanya kodwa kungaphelelanga apho ukuqhekeka kwebhondi, ukwakheka kwebhondi entsha, ukudluliselwa kweproton kunye ne-electron, i-compound isomerization, ukwahlukana kweemolekyuli, isantya, i-angle, kunye nokusasazwa kwesimo se-intermediates ye-reaction kunye neemveliso zokugqibela, iimpendulo zeekhemikhali ezenzeka kwizisombululo kunye nempembelelo ye-solvents, kunye nempembelelo yokungcangcazela kweemolekyuli kunye nokujikeleza kwiimpendulo zeekhemikhali.

IiYunithi zoGuqulo lweXesha zeNanoseconds, iiPicoseconds, kunye neeFemtoseconds

I-1ns (nanosecond) = 0.0000000001 imizuzwana = imizuzwana eli-10-9

I-1ps (i-picosecond) = 0.0000000000001 imizuzwana = imizuzwana eli-10-12

1fs (i-femtosecond) = 0.0000000000000001 imizuzwana = imizuzwana eli-10-15

Izixhobo zokucubungula i-laser ze-nanosecond, picosecond, kunye ne-femtosecond ezisetyenziswa kakhulu kwimarike zibizwa ngegama elisekelwe kwixesha. Ezinye izinto, ezinje ngamandla e-pulse enye, ububanzi be-pulse, i-pulse frequency, kunye namandla e-pulse peak, nazo zidlala indima ekukhetheni izixhobo ezifanelekileyo zokucubungula izixhobo ezahlukeneyo. Okukhona ixesha lifutshane, kokukhona impembelelo encinci kumphezulu wezinto, nto leyo ekhokelela kwisiphumo esingcono sokucubungula.

Izicelo zonyango zePicosecond, Femtosecond, kunye neNanosecond Lasers

Iilaser zeNanosecond zifudumeza kwaye zitshabalalise i-melanin eluswini, ethi emva koko isuswe emzimbeni ziiseli, nto leyo ebangela ukuba izilonda ezinombala ziphele. Le ndlela isetyenziswa kakhulu kunyango lweengxaki zombala. Iilaser zePicosecond zisebenza ngesantya esiphezulu, ziqhekeza amasuntswana e-melanin ngaphandle kokonakalisa ulusu olujikelezileyo. Le ndlela iphatha ngempumelelo izifo ezinombala ezifana ne-nevus ye-Ota kunye ne-Brown cyan nevus. Ilaser yeFemtosecond isebenza ngohlobo lwee-pulses, ezinokukhupha amandla amakhulu ngephanyazo, zilungele unyango lwe-myopia.

Inkqubo Yokupholisa yePicosecond, Femtosecond, kunye neNanosecond Lasers

Nokuba i-laser ye-nanosecond, i-picosecond okanye i-femtosecond, kuyimfuneko ukuqinisekisa ukusebenza okuqhelekileyo kwentloko ye-laser kunye nokudibanisa izixhobo kunye i-laser chiller . Okukhona izixhobo ze-laser zichaneke ngakumbi, kokukhona ukuchaneka kokulawula ubushushu kuphezulu. TEYU i-laser chiller ekhawulezayo inozinzo lobushushu lwe-±0.1°C kunye nokupholisa ngokukhawuleza, okuqinisekisa ukuba i-laser isebenza kubushushu obungaguqukiyo kwaye inomphumo ozinzileyo womqadi, ngaloo ndlela iphucula ubomi benkonzo ye-laser.TEYU ii-laser chillers ezikhawulezayo kakhulu zifanelekile kuzo zonke ezi ntlobo zintathu zezixhobo ze-laser.