Ubuninzi bamandla kunye nokuxinana kwamandla e-laser

Ubuninzi bamandla kunye nokuxinana kwamandla e-laser

Uxinaniso bubungakanani bomzimba esiqhelene nabo kakhulu kubomi bethu bemihla ngemihla, ukuxinana esinxibelelana kakhulu nobuninzi bezinto eziphathekayo, ifomula ngu-ρ=m/v, oko kukuthi, ubuninzi bulingana nobunzima obahlulwe ngomthamo. Kodwa ubuninzi bamandla kunye nobuninzi bamandla we-laser bahluke, apha bahlulwe ngummandla kunomthamo. Amandla nawo unxibelelwano lwethu kunye nobuninzi bomzimba, kuba sisebenzisa umbane yonke imihla, umbane uya kubandakanya amandla, iyunithi yomgangatho wamazwe ngamazwe yamandla nguW, oko kukuthi, i-J / s, ngumlinganiselo wamandla kunye nexesha leyunithi, Iyunithi esemgangathweni yamazwe ngamazwe yamandla yi-J. Ngoko uxinano lwamandla yingcamango yokudibanisa amandla kunye noxinaniso, kodwa nantsi indawo yokukhanya kwebala kunokuba umthamo, amandla ahlulwe yindawo yemveliso yoxinzelelo lwamandla, oko kukuthi. , iyunithi yoxinano lwamandla yi-W/m2, kwaye kwiintsimi laser, ngenxa yokuba indawo ye-laser irradiation spot incinci kakhulu, ngoko ke ngokubanzi iW/cm2 isetyenziswa njengeyunithi. Ubuninzi bamandla bususwa kwingcamango yexesha, ukudibanisa amandla kunye nobuninzi, kwaye iyunithi yi-J / cm2. Ngokuqhelekileyo, iilaser eziqhubekayo zichazwe kusetyenziswa ubuninzi bamandla, ngelixai-pulsed laserszichazwa kusetyenziswa zombini ukuxinana kwamandla kunye noxinzelelo lwamandla.

Xa i-laser isebenza, uxinaniso lwamandla ludla ngokumisela ukuba umda wokutshabalalisa, okanye ukucima, okanye ezinye izinto zokusebenza zifikelelwe. I-Threshold yingqikelelo edla ngokuvela xa kufundwa intsebenziswano yee-laser nomcimbi. Kuphononongo lwe-pulse emfutshane (enokuthi ithathelwe ingqalelo njengenqanaba le-us), i-ultra-short pulse (enokuthi ithathwe njengenqanaba le-ns), kunye ne-ultra-fast (ps kunye ne-fs stage) imathiriyeli yelaser, abaphandi baqhelekile yamkela ingqikelelo yoxinano lwamandla. Le ngcamango, kwinqanaba lokusebenzisana, imele amandla asebenza kwindawo ekujoliswe kuyo kwiyunithi nganye, kwimeko ye-laser yezinga elifanayo, le ngxoxo ibaluleke kakhulu.

Kukwakho nomda wokuxinana kwamandla kwinaliti yepulse enye. Oku kwenza ufundo lwe-laser-matter interaction lubenzima ngakumbi. Nangona kunjalo, izixhobo zovavanyo zanamhlanje zihlala zitshintsha, ububanzi be-pulse ububanzi, amandla e-pulse enye, ukuphindaphinda okuphindaphindiweyo kunye nezinye iiparamitha zihlala zitshintsha, kwaye zifuna ukuqwalasela imveliso ye-laser ekuguquguqukeni kwamandla kwimeko yoxinzelelo lwamandla. ukulinganisa, kusenokuba rhabaxa kakhulu. Ngokubanzi, kunokucingelwa ukuba amandla oxinaniso ahlulwe ngobubanzi be-pulse yi-avareji yexesha loxinaniso lwamandla (qaphela ukuba lixesha, hayi indawo). Nangona kunjalo, kuyacaca ukuba eyona ndlela yokwenyani ye-laser waveform isenokungabi luxande, i-square wave, okanye intsimbi okanye i-Gaussian, kwaye ezinye zimiselwa ziipropathi ze-laser ngokwayo, ebunjwe ngakumbi.

Ububanzi be-pulse budla ngokunikezelwa yi-half-height ububanzi obunikezelwa yi-oscilloscope (i-peak epheleleyo yesiqingatha-ububanzi be-FWHM), okubangela ukuba sibale ixabiso lobuninzi bamandla ukusuka kumandla ombane, aphezulu. Ubude nobubanzi besiqingatha bufaneleke ngakumbi kufuneka bubalwe ngokudibeneyo, ubude besiqingatha nobubanzi. Akukhange kubekho uphando oluneenkcukacha malunga nokuba kukho umgangatho ofanelekileyo we-nuance yokwazi.Ngoxinaniso lwamandla ngokwawo, xa usenza izibalo, ngokuqhelekileyo kunokwenzeka ukusebenzisa i-pulse energy eyodwa ukubala, i-pulse eyodwa yamandla / i-pulse ububanzi / indawo yendawo. , leyo yi-avareji yendawo yamandla, kwaye iphinda-phindwe ngo-2, kuba amandla encopho yendawo (unikezelo lwesithuba lusasazo lwe-Gauss luhlobo olunjalo lonyango, umnqwazi ongaphezulu akufuneki ukwenze njalo), kwaye iphinda-phindwe ngentetho yosasazo lweradial. , Kwaye ugqibile.