Ubucucike bwimbaraga nubucucike bwa laser

Ubucucike bwimbaraga nubucucike bwa laser

Ubucucike ni ubwinshi bwumubiri tumenyereye cyane mubuzima bwacu bwa buri munsi, ubucucike duhura cyane nubucucike bwibintu, formula ni ρ = ​​m / v, ni ukuvuga, ubucucike bungana na misa igabanijwe nubunini. Ariko ubucucike bwimbaraga nubucucike bwa laser biratandukanye, hano bigabanijwe nakarere kuruta amajwi. Imbaraga nazo duhura nibintu byinshi bifatika, kubera ko dukoresha amashanyarazi burimunsi, amashanyarazi azaba arimo ingufu, urwego mpuzamahanga rusanzwe rwamashanyarazi ni W, ni ukuvuga J / s, ni igipimo cyingufu nigihe cyigihe, the urwego mpuzamahanga rusanzwe rwingufu ni J. Rero ubucucike bwimbaraga nigitekerezo cyo guhuza imbaraga nubucucike, ariko dore agace ka irrasiyo yikibanza aho kuba ingano, ingufu zigabanijwe nigice gisohoka nubucucike bwamashanyarazi, nibyo , ubumwe bwimbaraga ni W / m2, no muriUmwanya, kubera ko laser irrasiyo yumwanya ari nto cyane, mubisanzwe W / cm2 ikoreshwa nkigice. Ingufu zingufu zavanyweho mubitekerezo byigihe, zihuza ingufu nubucucike, kandi igice ni J / cm2. Mubisanzwe, lazeri ikomeza isobanurwa ukoresheje ingufu zingana, mugihelaseribisobanurwa hifashishijwe ingufu zingana nubucucike bwingufu.

Iyo laser ikora, ubucucike bwimbaraga busanzwe bugena niba urwego rwo gusenya, cyangwa gukuraho, cyangwa ibindi bikoresho bikora bigerwaho. Threshold nigitekerezo gikunze kugaragara mugihe wiga imikoranire ya laseri nibintu. Kubushakashatsi bwimbaraga ngufi (zishobora gufatwa nkicyiciro cya us), ultra-short pulse (ishobora gufatwa nkicyiciro cya ns), ndetse na ultra-yihuta (ps na fs icyiciro) ibikoresho bya laser, abashakashatsi ba mbere mubisanzwe fata igitekerezo cyubwinshi bwingufu. Iki gitekerezo, kurwego rwimikoranire, cyerekana imbaraga zikora kumugambi kuri buri gice, mugihe cya laser yo murwego rumwe, iki kiganiro gifite akamaro kanini.

Hariho kandi urwego rwimbaraga zingufu zo gutera inshinge imwe. Ibi kandi bituma ubushakashatsi bwimikoranire ya laser-ibintu bigorana. Nyamara, ibikoresho byubushakashatsi byiki gihe birahora bihinduka, ubugari butandukanye bwimisemburo, ingufu za pulse imwe, inshuro zisubiramo nibindi bipimo bihora bihinduka, ndetse bikeneye no gutekereza ku musaruro nyawo wa laser mu ihindagurika ryingufu za pulse mugihe habaye ingufu nyinshi. gupima, birashobora kuba bikabije.Muri rusange, birashobora gufatwa nkaho ubwinshi bwingufu zigabanijwe nubugari bwa pulse nigihe cyo kugereranya ingufu (menya ko arigihe, ntabwo ari umwanya). Ariko, biragaragara ko imiterere ya lazeri nyirizina idashobora kuba urukiramende, umurongo wa kare, cyangwa inzogera cyangwa Gaussian, kandi bimwe bigenwa nimiterere ya lazeri ubwayo, ikaba ifite ishusho.

Ubugari bwa pulse mubusanzwe butangwa nubugari bwuburebure butangwa na oscilloscope (impinga yuzuye yubugari bwa FWHM), bidutera kubara agaciro k'ubucucike bw'ingufu zituruka ku bucucike bw'ingufu, buri hejuru. Birenzeho igice cyuburebure nubugari bigomba kubarwa nuburinganire, igice cyuburebure nubugari. Ntabwo habaye iperereza rirambuye ryerekana niba hari urwego rukwiye rwo kumenya.Kubera ubwinshi bwimbaraga ubwazo, mugihe ukora ibarwa, mubisanzwe birashoboka gukoresha ingufu za pulse imwe kugirango ubare, ingufu imwe ya pulse / ubugari bwa pulse / ahantu hagaragara , aribwo imbaraga zigereranijwe zingana, hanyuma zigwizwa na 2, kububasha bwo hejuru bwikibanza (gukwirakwiza umwanya ni kugabana kwa Gauss ni uburyo bwo kuvura, ingofero yo hejuru ntabwo ikeneye kubikora), hanyuma ikagwizwa no gukwirakwiza radiyo. , Kandi urangije.