Laser Izindaba
Ukulawulwa Kwezinga lokushisa Okunembile Kwezinhlelo Ze-Laser Nezicelo Zezimboni Kusukela ngo-2002
Ulimi
Ubuchwepheshe be-laser buthuthuke ngokushesha emashumini ambalwa eminyaka adlule. Kusukela ku-nanosecond laser kuya ku-picosecond laser kuya ku-femtosecond laser, iye yasetshenziswa kancane kancane ekukhiqizeni izimboni, ihlinzeka ngezixazululo zayo yonke imikhakha yempilo. Kodwa kungakanani okwaziyo ngalezi zinhlobo ezi-3 zamalaser? Lesi sihloko sizokhuluma ngezincazelo zabo, amayunithi okuguqula isikhathi, izinhlelo zokusebenza zezokwelapha kanye nezinhlelo zokupholisa zokupholisa amanzi.
Ubuchwepheshe be-laser buthuthuke ngokushesha emashumini ambalwa eminyaka adlule. Kusukela ku-nanosecond laser kuya ku-picosecond laser kuya ku-femtosecond laser, iye yasetshenziswa kancane kancane ekukhiqizeni izimboni, ihlinzeka ngezixazululo zayo yonke imikhakha yempilo.Kodwa kungakanani okwaziyo ngalezi zinhlobo ezi-3 zamalaser? Ake sithole ndawonye:
Izincazelo ze-Nanosecond, Picosecond, ne-Femtosecond Lasers
I-laser yesibili yethulwa okokuqala emkhakheni wezimboni ngasekupheleni kwawo-1990 njengamalaser e-diode-pumped solid-state (DPSS). Kodwa-ke, ama-laser okuqala anjalo ayenamandla aphansi okukhipha ama-watts ambalwa kanye nobude begagasi obungu-355nm. Ngokuhamba kwesikhathi, imakethe yama-nanosecond lasers isikhulile, futhi ama-lases amaningi manje anesikhathi sokushaya kwenhliziyo emashumini kuya kumakhulu ama-nanoseconds.
I-laser yesibili iyi-laser yobubanzi be-pulse emfishane kakhulu ekhipha amapulse eleveli ye-picosecond. Lawa ma-lasers anikezela ngobubanzi be-ultra-short pulse, imvamisa yokuphindaphinda okulungiswayo, amandla okushaya okuphezulu, futhi alungele ukusetshenziswa ku-biomedicine, i-optical parametric oscillation, kanye ne-biological microscopic imaging. Ezinhlelweni zesimanje ze-biological imaging and analysis, ama-lasecond lasers abe ngamathuluzi abaluleke kakhulu.
I-laser ye-Femtosecond i-ultra-short pulse laser enamandla amakhulu ngendlela emangalisayo, ebalwa ngama-femtoseconds. Lobu buchwepheshe obuthuthukisiwe bunikeze abantu amathuba amasha okuhlola angakaze abonwe futhi bunomsebenzi obanzi. Ukusetshenziswa kwe-laser ye-femtosecond enamandla kakhulu, efinyeziwe ngezinjongo zokutholwa kunenzuzo ikakhulukazi ekuphenduleni kwamakhemikhali okuhlukahlukene, okuhlanganisa kodwa kungagcini nje ngokuqhekeka kwebhondi, ukwakheka kwebhondi entsha, ukudluliswa kwe-proton kanye ne-electron, i-compound isomerization, ukuhlukaniswa kwamangqamuzana, isivinini, i-engeli. , kanye nokusatshalaliswa kombuso kokusabela okuphakathi nendawo kanye nemikhiqizo yokugcina, ukusabela kwamakhemikhali okwenzeka ezixazululweni nomthelela wezincibilikisi, kanye nomthelela wokudlidliza kwamangqamuzana nokuzungeza ekuphenduleni kwamakhemikhali.
Amayunithi Okuguqulwa Kwesikhathi we-Nanoseconds, Picoseconds, kanye nama-Femtoseconds
1ns (nanosecond) = 0.0000000001 imizuzwana = 10-9 imizuzwana
1ps (picosecond) = 0.00000000000001 imizuzwana = 10-12 imizuzwana
1fs (femtosecond) = 0.000000000000001 imizuzwana = 10-15 imizuzwana
Imishini yokucubungula i-nanosecond, i-picosecond, kanye ne-femtosecond laser evame ukubonakala emakethe iqanjwe ngokuya ngesikhathi. Ezinye izici, njengamandla okushaya kwenhliziyo okukodwa, ububanzi bokushaya kwenhliziyo, imvamisa yokushaya kwenhliziyo, namandla okuphakama kwe-pulse, nazo zidlala indima ekukhetheni okokusebenza okufanelekile kokucubungula izinto ezahlukahlukene. Isikhathi esifushane, umthelela omncane endaweni yezinto ezibonakalayo, okuholela kumphumela ongcono wokucubungula.
Izicelo Zezokwelapha ze-Picosecond, Femtosecond, ne-Nanosecond Lasers
Ama-lasecond lasers akhetha ukushisa futhi abhubhise i-melanin esikhumbeni, esuke isikhishwa amaseli emzimbeni, okuholela ekufiphaleni kwezilonda ezinemibala. Le ndlela isetshenziswa kakhulu ekwelapheni izifo ze-pigmentation. Amalaser e-Picosecond asebenza ngesivinini esikhulu, ephula izinhlayiya ze-melanin ngaphandle kokulimaza isikhumba esizungezile. Le ndlela iphatha ngempumelelo izifo ezinemibala efana ne-nevus ye-Ota kanye ne-Brown cyan nevus.I-laser ye-Femtosecond isebenza ngendlela yama-pulses, engakhipha amandla amakhulu ngokuphazima kweso, okuhle ekwelapheni i-myopia.
Isistimu Yokupholisa ye-Picosecond, Femtosecond, ne-Nanosecond Lasers
Kungakhathaliseki ukuthi i-nanosecond, i-picosecond noma i-laser ye-femtosecond, kuyadingeka ukuqinisekisa ukusebenza okujwayelekile kwekhanda le-laser futhi ubhanqe okokusebenza ne-laser. i-laser chiller. Uma imishini ye-laser inembe kakhudlwana, kulapho izinga lokushisa likhuphuka khona ukunemba kokulawula. I-TEYU ultrafast laser chiller inokuzinza kwezinga lokushisa okungu-±0.1°C nokupholisa okusheshayo, okuqinisekisa ukuthi i-laser isebenza ezingeni lokushisa elingaguquki futhi inokukhipha okuzinzile kwe-beam, ngaleyo ndlela ithuthukisa impilo yesevisi ye-laser. I-TEYU ultrafast laser chillers zifanele zonke lezi zinhlobo ezintathu zemishini ye-laser.
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I-TEYU S&A Chiller yasungulwa ngo-2002 ineminyaka engama-23 yesipiliyoni sokukhiqiza okupholile, futhi manje isiqashelwa njengephayona lobuchwepheshe bokupholisa kanye nozakwethu onokwethenjelwa embonini ye-laser.
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