Kuchuluka kwa mphamvu ndi kachulukidwe kamphamvu ka laser

Kuchuluka kwa mphamvu ndi kachulukidwe kamphamvu ka laser

Kachulukidwe ndi kuchuluka kwa thupi komwe timadziwa bwino m'moyo wathu watsiku ndi tsiku, kachulukidwe komwe timalumikizana kwambiri ndi kachulukidwe kazinthu, chilinganizo ndi ρ=m/v, ndiko kuti, kachulukidwe ndi kofanana ndi misa yogawidwa ndi voliyumu. Koma kachulukidwe mphamvu ndi mphamvu kachulukidwe laser ndi osiyana, apa ogawanika ndi dera osati voliyumu. Mphamvu imakhalanso kukhudzana kwathu ndi kuchuluka kwa thupi, chifukwa timagwiritsa ntchito magetsi tsiku lililonse, magetsi adzaphatikizapo mphamvu, mphamvu yapadziko lonse lapansi ndi W, ndiko kuti, J / s, ndi chiŵerengero cha mphamvu ndi nthawi, international standard unit of energy ndi J. Choncho kachulukidwe mphamvu ndi lingaliro la kaphatikizidwe mphamvu ndi kachulukidwe, koma apa pali walitsa dera malo osati voliyumu, mphamvu ogawanika ndi linanena bungwe malo m'dera ndi kachulukidwe mphamvu, ndiko. , gawo la kachulukidwe mphamvu ndi W/m2, ndi mulaser munda, chifukwa malo opangira kuwala kwa laser ndi ochepa, choncho nthawi zambiri W/cm2 imagwiritsidwa ntchito ngati unit. Kuchuluka kwa mphamvu kumachotsedwa ku lingaliro la nthawi, kuphatikiza mphamvu ndi kachulukidwe, ndipo unit ndi J / cm2. Nthawi zambiri, ma lasers opitilira amafotokozedwa pogwiritsa ntchito kachulukidwe kamphamvu, pomwelasers pulsedamafotokozedwa pogwiritsa ntchito kachulukidwe mphamvu ndi kachulukidwe mphamvu.

Laser ikachita, kachulukidwe ka mphamvu nthawi zambiri amatsimikizira ngati khomo lakuwononga, kapena kuphulika, kapena zinthu zina zosewerera zafika. Threshold ndi lingaliro lomwe nthawi zambiri limawonekera pophunzira kuyanjana kwa lasers ndi zinthu. Pakufufuza kwa kugunda kwaifupi (komwe kumatha kuonedwa ngati siteji ya ife), kugunda kwamphamvu kwambiri (komwe kumatha kuonedwa ngati gawo la ns), komanso zida zolumikizirana za laser (ps ndi fs siteji), ofufuza oyambilira nthawi zambiri. tengerani lingaliro la kachulukidwe ka mphamvu. Lingaliro ili, pamlingo wa kuyanjana, likuyimira mphamvu zomwe zimagwira ntchito pa chandamale pa gawo la unit, pa nkhani ya laser ya mlingo womwewo, zokambiranazi ndizofunika kwambiri.

Palinso polowera mphamvu kachulukidwe wa single kugunda jakisoni. Izi zimapangitsanso kuphunzira kuyanjana kwa laser-matter kukhala kovuta. Komabe, zida zoyesera zamasiku ano zikusintha nthawi zonse, mitundu yosiyanasiyana ya kugunda kwamphamvu, mphamvu ya kugunda kwamphamvu, kubwereza pafupipafupi ndi magawo ena akusintha nthawi zonse, ndipo amafunikiranso kulingalira za kutulutsa kwenikweni kwa laser mu kusinthasintha kwamphamvu kwamphamvu pakachulukidwe kamphamvu. kuyeza, kungakhale kovuta kwambiri.Nthawi zambiri, zikhoza kuganiziridwa kuti kachulukidwe ka mphamvu kamene kagawanika ndi kugunda m'lifupi ndi nthawi yochuluka ya mphamvu (zindikirani kuti ndi nthawi, osati danga). Komabe, ndizodziwikiratu kuti mawonekedwe enieni a laser waveform mwina sangakhale amakona anayi, mafunde akulu akulu, kapena belu kapena Gaussian, ndipo ena amatsimikiziridwa ndi mawonekedwe a laser omwe, omwe amawumbidwa kwambiri.

Kutalika kwa pulse nthawi zambiri kumaperekedwa ndi theka la kutalika kwake komwe kumaperekedwa ndi oscilloscope (chinsomba chokwanira cha theka-m'lifupi FWHM), chomwe chimatipangitsa kuwerengera mtengo wa mphamvu ya mphamvu kuchokera ku mphamvu ya mphamvu, yomwe ili pamwamba. Theka yoyenera kutalika ndi m'lifupi ayenera kuwerengedwa ndi chophatikizika, theka kutalika ndi m'lifupi. Sipanakhalepo kufufuza mwatsatanetsatane ngati pali mulingo woyenera wa nuance wodziwa.Pa kuchuluka kwa mphamvu komweko, powerengera, nthawi zambiri zimakhala zotheka kugwiritsa ntchito mphamvu yamtundu umodzi kuti muwerengere, kugunda kwamphamvu / kugunda m'lifupi / malo. , yomwe ndi mphamvu yapakati yapakati, ndiyeno kuchulukitsidwa ndi 2, chifukwa cha mphamvu yapakati pa malo (kugawa kwa malo ndi Gauss kugawa ndi chithandizo chotero, chipewa chapamwamba sichiyenera kutero), ndiyeno kuchulukitsidwa ndi mawu ogawa ma radial. , Ndipo mwatha.