Uyawazi Umehluko Phakathi Kwe-Nanosecond, Picosecond kanye ne-Femtosecond Lasers?

Ubuchwepheshe be-laser buthuthuke ngokushesha eminyakeni embalwa edlule. Kusukela ku-nanosecond laser kuya ku-picosecond laser kuya ku-femtosecond laser, busetshenziswe kancane kancane ekukhiqizeni kwezimboni, buhlinzeka ngezixazululo zazo zonke izinhlobo zokuphila. Kodwa kungakanani okwaziyo ngalezi zinhlobo ezintathu zama-laser? Ake sithole ndawonye:

Izincazelo ze-Nanosecond, Picosecond, kanye ne-Femtosecond Lasers

I-laser ye-nanosecond yaqala ukwethulwa emkhakheni wezimboni ngasekupheleni kweminyaka yama-1990 njengama-laser e-diode-pumped solid-state (DPSS). Kodwa-ke, ama-laser okuqala anjalo ayenamandla okukhipha aphansi angama-watts ambalwa kanye nobude be-wavelength obungu-355nm. Ngokuhamba kwesikhathi, imakethe yama-laser e-nanosecond iye yavuthwa, futhi ama-laser amaningi manje anesikhathi sokushaya kwenhliziyo ngamasekhondi angamashumi kuya kwamakhulu.

I-Picosecond laser iyi-laser yobubanzi be-pulse obufushane kakhulu ekhipha ama-pulse ezingeni le-picosecond. Lawa ma-laser anikeza ububanzi be-pulse obufushane kakhulu, imvamisa yokuphindaphinda elungisekayo, amandla aphezulu e-pulse, futhi alungele ukusetshenziswa kwezokwelapha nge-biomedicine, i-optical parametric oscillation, kanye ne-biological microscopic imaging. Ezinhlelweni zesimanje ze-biological imaging kanye nokuhlaziya, ama-picosecond lasers abe ngamathuluzi abaluleke kakhulu.

I-laser ye-Femtosecond iyi-laser ye-pulse emfushane kakhulu enamandla amakhulu kakhulu, ebalwa ngama-femtosecond. Lobu buchwepheshe obuthuthukisiwe bunikeze abantu amathuba amasha okuhlola angakaze abonwe futhi bunezinhlelo zokusebenza ezibanzi. Ukusetshenziswa kwe-laser ye-femtosecond enamandla kakhulu, emfushane kakhulu ngezinjongo zokuthola kuzuzisa kakhulu ukusabela kwamakhemikhali ahlukahlukene, okuhlanganisa kodwa kungagcini ekuqhekekeni kwezibopho, ukwakheka kwezibopho ezintsha, ukudluliselwa kwe-proton kanye ne-electron, i-compound isomerization, ukuhlukaniswa kwama-molecule, isivinini, i-angle, kanye nokusatshalaliswa kwesimo sezinto ezisebenzisanayo zokusabela kanye nemikhiqizo yokugcina, ukusabela kwamakhemikhali okwenzeka ezixazululweni kanye nomthelela wezixazululo, kanye nomthelela wokudlidliza kwama-molecule kanye nokujikeleza kokusabela kwamakhemikhali.

Amayunithi Okuguqulwa Kwesikhathi kwama-Nanoseconds, ama-Picoseconds, nama-Femtoseconds

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

1ps (i-picosecond) = 0.00000000000001 imizuzwana = 10-12 imizuzwana

1fs (isekhondi ye-femto) = 0.0000000000000001 imizuzwana = imizuzwana eyi-10-15

Imishini yokucubungula i-laser ye-nanosecond, i-picosecond, kanye ne-femtosecond evame ukubonakala emakethe iqanjwe ngokususelwa esikhathini. Ezinye izici, njengamandla okushaya okukodwa, ububanzi bokushaya, imvamisa yokushaya, kanye namandla okushaya okuphezulu, nazo zidlala indima ekukhetheni imishini efanele yokucubungula izinto ezahlukene. Uma isikhathi sifushane, kulapho umthelela omncane ebusweni bezinto ezibonakalayo, okuholela emphumeleni wokucubungula ongcono.

Izicelo Zezokwelapha ze-Picosecond, Femtosecond, kanye ne-Nanosecond Lasers

Ama-laser e-nanosecond ashisa futhi abhubhise i-melanin esikhumbeni, bese isuswa emzimbeni ngamaseli, okuholela ekunyamalaleni kwezilonda ezinombala. Le ndlela ivame ukusetshenziswa ekwelapheni izinkinga zombala. Ama-laser e-Picosecond asebenza ngesivinini esikhulu, ephula izinhlayiya ze-melanin ngaphandle kokulimaza isikhumba esizungezile. Le ndlela yelapha ngempumelelo izifo ezinombala njenge-nevus ye-Ota kanye ne-Brown cyan nevus. I-Femtosecond laser isebenza ngesimo sama-pulses, angakhipha amandla amakhulu ngokushesha, alungele ukwelashwa kwe-myopia.

Uhlelo Lokupholisa lwe-Picosecond, Femtosecond, kanye ne-Nanosecond Lasers

Kungakhathaliseki ukuthi i-laser ye-nanosecond, i-picosecond noma i-femtosecond, kuyadingeka ukuqinisekisa ukusebenza okuvamile kwekhanda le-laser bese ubhanqa imishini ne-a umshini wokuphola we-laser . Uma imishini ye-laser inembe kakhulu, kulapho ukunemba kokulawula izinga lokushisa kukhuphuka khona. TEYU i-ultrafast laser chiller inokuqina kwezinga lokushisa okungu-±0.1°C kanye nokupholisa okusheshayo, okuqinisekisa ukuthi i-laser isebenza ekushiseni okungaguquki futhi inomphumela ozinzile womsebe, ngaleyo ndlela ithuthukise impilo yesevisi ye-laser.TEYU ama-laser chiller asheshayo zifanele zonke lezi zinhlobo ezintathu zemishini ye-laser.