Ukuminyana kwamandla kanye nokuminyana kwamandla we-laser

Ukuminyana kwamandla kanye nokuminyana kwamandla we-laser

Ukuminyana inani elibonakalayo esilijwayele kakhulu ekuphileni kwethu kwansuku zonke, ukuminyana esithintana kakhulu nakho ukuminyana kwezinto, ifomula ithi ρ=m/v, okungukuthi, ukuminyana kulingana nesisindo esihlukaniswa ngevolumu. Kodwa ukuminyana kwamandla kanye nokuqina kwamandla we-laser kuhlukile, lapha kuhlukaniswa ngendawo kunevolumu. Amandla nawo angukuxhumana kwethu nenani elikhulu lezinto ezibonakalayo, ngoba sisebenzisa ugesi nsuku zonke, ugesi uzobandakanya amandla, iyunithi yamandla yamazwe ngamazwe i-W, okungukuthi, i-J / s, isilinganiso samandla nesikhathi seyunithi, iyunithi yamandla yamazwe ngamazwe yamandla ngu-J. Ngakho ukuminyana kwamandla kuwumqondo wokuhlanganisa amandla nokushu ukuminyana kwamandla ngu-W/m2, futhi ku-inkambu ye-laser, ngenxa yokuthi indawo ye-laser irradiation spot incane kakhulu, ngakho-ke ngokuvamile i-W/cm2 isetshenziswa njengeyunithi. Ukuminyana kwamandla kuyasuswa emcabangweni wesikhathi, okuhlanganisa amandla nokuminyana, kanti iyunithi ithi J/cm2. Imvamisa, ama-lasers aqhubekayo achazwa kusetshenziswa ukuminyana kwamandla, kuyilaphoi-pulsed laserszichazwa kusetshenziswa kokubili ukuminyana kwamandla kanye nokuminyana kwamandla.

Lapho i-laser isebenza, ukuminyana kwamandla kuvame ukunquma ukuthi umkhawulo wokucekela phansi, noma wokucisha, noma ezinye izinto ezibambekayo ziyafinyelelwa. I-Threshold umqondo ovame ukuvela lapho ufunda ukusebenzisana kwama-lasers nendaba. Ocwaningweni lokushaya kwenhliziyo okufushane (okungabhekwa njengesiteji se-us), i-ultra-short pulse (engathathwa njengesiteji se-ns), kanye nezinto zokusebenzisana ze-laser ezisheshayo (ps kanye ne-fs), abacwaningi bokuqala bavamise ukwamukela umqondo wokuminyana kwamandla. Lo mqondo, ezingeni lokusebenzelana, umele amandla asebenza kulokho okuhlosiwe endaweni yeyunithi ngayinye, esimweni se-laser yezinga elifanayo, le ngxoxo ibaluleke kakhulu.

Kukhona futhi umkhawulo wokuminyana kwamandla womjovo we-pulse eyodwa. Lokhu futhi kwenza ucwaningo lokusebenzisana kwe-laser-matter lube nzima kakhulu. Kodwa-ke, imishini yokuhlola yanamuhla ishintsha njalo, ububanzi be-pulse ububanzi, amandla okushaya kwe-pulse eyodwa, imvamisa yokuphindaphinda kanye neminye imingcele ishintsha njalo, futhi idinga ukucabangela ukukhishwa kwangempela kwe-laser ekuguquguqukeni kwamandla okuthinta esimweni sokuminyana kwamandla ukukala, kungase kube kubi kakhulu. hhayi indawo). Kodwa-ke, kusobala ukuthi i-laser waveform yangempela kungenzeka ingabi unxande, igagasi lesikwele, noma insimbi noma i-Gaussian, futhi amanye anqunywa yizakhiwo ze-laser uqobo, ezimise kakhulu.

Ububanzi be-pulse ngokuvamile bunikezwa ububanzi obuyingxenye yobude obunikezwa i-oscilloscope (i-full peak half-width FWHM), okusibangela ukuba sibale inani lokuminyana kwamandla kusukela ku-energy density, ephakeme. Ubude nobubanzi obuyingxenye efanele kufanele kubalwe ngokuhlanganisa, ubude nobubanzi obuyingxenye. Akukaze kube nophenyo oluningiliziwe mayelana nokuthi kukhona yini indinganiso ye-nuance efanele yokwazi. Ngobuningi bamandla ngokwawo, lapho wenza izibalo, ngokuvamile kungenzeka ukusebenzisa amandla okushaya okukodwa ukuze kubalwe, amandla okushayela okukodwa/ububanzi be-pulse/indawo yebala, okungamandla amaphakathi wendawo, aphinde aphindwe ngo-2, ukuze amandla aphakeme endawo asetshenziswe (indawo yokusabalalisa ayidingi ukusabalalisa kwendawo so), bese iphindaphindwa ngenkulumo yokusabalalisa eyiradial, Futhi usuqedile.