Uxinano lwamandla kunye noxinano lwamandla lwelaser

Uxinano lwamandla kunye noxinano lwamandla lwelaser

Uxinano sisixa esibonakalayo esiqhelene naso kubomi bethu bemihla ngemihla, uxinano esilufikelela kakhulu luxinano lwezinto, ifomula yi-ρ=m/v, oko kukuthi, uxinano lulingana nobunzima obahlulwe ngomthamo. Kodwa uxinano lwamandla kunye noxinano lwamandla lwelaser zahlukile, apha zahlulwe yindawo endaweni yomthamo. Amandla akwayindlela esinxibelelana ngayo nobuninzi obuninzi bomzimba, kuba sisebenzisa umbane yonke imihla, umbane uya kubandakanya amandla, iyunithi yamandla esemgangathweni yamazwe ngamazwe yi-W, oko kukuthi, i-J/s, ngumlinganiselo wamandla kunye neyunithi yexesha, iyunithi yamandla esemgangathweni yamazwe ngamazwe yi-J. Ngoko ke uxinano lwamandla yingcamango yokudibanisa amandla kunye noxinano, kodwa nantsi indawo yokukhanyisela yendawo endaweni yomthamo, amandla ahlulwe yindawo yesiphumo yixinano lwamandla, oko kukuthi, iyunithi yoxinano lwamandla yi-W/m2, kwaye kwiintsimi yelaser, kuba indawo ye-laser irradiation spot incinci kakhulu, ngoko ke ngokubanzi i-W/cm2 isetyenziswa njengeyunithi. Uxinano lwamandla lususwa kwingcamango yexesha, ludibanisa amandla kunye noxinano, kwaye iyunithi yi-J/cm2. Ngokwesiqhelo, ii-laser eziqhubekayo zichazwa kusetyenziswa uxinano lwamandla, ngelixaiileza ezishukumayozichazwa kusetyenziswa zombini uxinano lwamandla kunye noxinano lwamandla.

Xa i-laser isebenza, uxinano lwamandla ludla ngokugqiba ukuba umda wokutshabalalisa, okanye wokurhoxisa, okanye ezinye izinto ezisebenzayo uyafikelelwa na. Umda yingcamango edla ngokuvela xa kufundwa ukusebenzisana kwe-laser nezinto. Kwisifundo se-short pulse (enokujongwa njenge-us stage), i-ultra-short pulse (enokujongwa njenge-ns stage), kwane-ultra-fast (ps kunye ne-fs stage) izixhobo zokwenza i-laser, abaphandi bokuqala badla ngokwamkela ingcamango yoxinano lwamandla. Le ngcamango, kwinqanaba lokusebenzisana, imele amandla asebenza kwindawo ekujoliswe kuyo ngeyunithi nganye, kwimeko ye-laser yenqanaba elifanayo, le ngxoxo ibaluleke kakhulu.

Kukwakho nomda wobuninzi bamandla e-single pulse injection. Oku kwenza ukuba uphando lokusebenzisana kwe-laser-matter lube nzima ngakumbi. Nangona kunjalo, izixhobo zovavanyo zanamhlanje zihlala zitshintsha, ububanzi be-pulse obahlukeneyo, amandla e-single pulse, amaza okuphindaphinda kunye nezinye iiparameter zihlala zitshintsha, kwaye kufuneka kuqwalaselwe nemveliso yokwenyani ye-laser kutshintsho lwamandla e-pulse kwimeko yobuninzi bamandla ukuze kulinganiswe, kunokuba nzima kakhulu. Ngokubanzi, kunokucingelwa ukuba ubunzima bamandla obahlulwe bububanzi be-pulse bubuninzi bamandla obuqhelekileyo bexesha (qaphela ukuba lixesha, hayi indawo). Nangona kunjalo, kuyacaca ukuba i-laser waveform yokwenyani isenokungabi yi-rectangular, square wave, okanye i-bell okanye i-Gaussian, kwaye ezinye zimiselwa ziimpawu ze-laser ngokwayo, enobume obungaphezulu.

Ububanzi be-pulse budla ngokunikezelwa bububanzi obuyisiqingatha sokuphakama obubonelelwa yi-oscilloscope (i-full peak half-width FWHM), nto leyo esibangela ukuba sibale ixabiso loxinano lwamandla ukusuka kuxinano lwamandla, oluphezulu. Ukuphakama nobubanzi obuyisiqingatha olufanelekileyo kufuneka kubalwe bubuninzi, ubude nobubanzi obuyisiqingatha. Akukho phando luneenkcukacha malunga nokuba kukho na umgangatho ofanelekileyo wokwazi. Kwi-power density ngokwayo, xa usenza izibalo, ngokuqhelekileyo kunokwenzeka ukusebenzisa amandla e-pulse enye ukubala, amandla e-pulse enye/ububanzi be-pulse/indawo yebala, eliyi-avareji yamandla esithuba, uze uphindaphindwe ngo-2, kwi-spatial peak power (usasazo lwendawo yi-Gauss distribution lunyango olunjalo, i-top-hat ayifuni ukwenza njalo), uze uphindaphindwe nge-radial distribution expression, Kwaye ugqibile.