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 iW, okungukuthi, i-J/s, isilinganiso samandla nesikhathi, Iyunithi yamandla yamazwe ngamazwe i-J. Ngakho ukuminyana kwamandla kuwumqondo wokuhlanganisa amandla nokuminyana, kodwa nansi indawo yokushiswa kwemisebe yendawo kunevolumu, amandla ahlukaniswa ngendawo yokuphumayo ukuminyana kwamandla, okungukuthi , iyunithi yokuminyana 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 lwe-pulse emfishane (engathathwa njengesiteji se-us), i-ultra-short pulse (engathathwa njengesiteji se-ns), kanye nezinto zokusebenzisana ze-laser ezisheshayo (ps kanye ne-fs), abacwaningi bokuqala ngokuvamile sebenzisa 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 we-pulse esimweni sokuminyana kwamandla. ukukala, kungase kube kubi kakhulu.Ngokuvamile, kungacatshangwa ukuthi ukuminyana kwamandla okuhlukaniswa ububanzi be-pulse yisilinganiso samandla esimaphakathi sesikhathi (qaphela ukuthi yisikhathi, hhayi isikhala). 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 likhona yini izinga elibalulekile lenuance lokwazi.Ngokuminyana kwamandla ngokwawo, uma kubalwa, kuvame ukukwazi ukusebenzisa amandla okushaya okukodwa ukuze kubalwe, amandla okushaya okukodwa/ububanzi beshayela/indawo yebala. , okungamandla amaphakathi wendawo, bese aphindaphindwa ngo-2, kumandla aphezulu wendawo (ukusatshalaliswa kwendawo ukusabalalisa kwe-Gauss kuwukwelashwa okunjalo, isigqoko esiphezulu asidingi ukwenza kanjalo), bese siphindaphindwa ngenkulumo yokusabalalisa kwe-radial. , Futhi usuqedile.