Simba density uye simba density yelaser

Simba density uye simba density yelaser

Density huwandu hwemuviri hwatinoziva zvakanyanya muhupenyu hwedu hwezuva nezuva, density yatinosangana nayo zvakanyanya ndeye density yezvinhu, fomula iri ρ=m/v, ndiko kuti, density yakaenzana nehukuru hwakakamurwa nehuwandu. Asi iyo simba density uye simba density yelaser zvakasiyana, pano yakakamurwa nenzvimbo kwete vhoriyamu. Simba ndirowo kuonana kwedu nehuwandu hwehuwandu hwemuviri, nokuti tinoshandisa magetsi zuva rega rega, magetsi achabatanidza simba, iyo yepasi rose chiyero chesimba reW, kureva, J / s, ndiyo chiyero chesimba uye nguva unit, iyo international standard unit of energy is J. Saka simba remagetsi ndiro pfungwa yekubatanidza simba uye density, asi heinoi irradiation nharaunda yenzvimbo, iyo nzvimbo yemagetsi inoparadzaniswa nehukuru, densi inoparadzaniswa nehukuru hwemagetsi. yesimba density ndeye W/m2, uye mulaser munda, nekuti nzvimbo yelaser irradiation spot idiki, saka kazhinji W/cm2 inoshandiswa seyuniti. Iyo simba density inobviswa kubva pane pfungwa yenguva, kubatanidza simba uye density, uye iyo unit ndeye J / cm2. Kazhinji, inoenderera lasers inotsanangurwa uchishandisa simba density, ukupulsed laserszvinotsanangurwa zvichishandisa zvese simba density uye simba density.

Kana iyo laser ichiita, iyo simba density inowanzo tarisa kana chikumbaridzo chekuparadza, kana kubvisa, kana zvimwe zvinhu zvekuita zvinosvikwa. Threshold ipfungwa inowanzo onekwa kana uchidzidza kusangana kwema lasers nenyaya. Pakudzidza kwepfuti pulse (iyo inogona kutorwa seyedu nhanho), ultra-short pulse (inogona kutorwa senhanho yens), uye kunyangwe yakanyanya-kukurumidza (ps uye fs nhanho) laser yekudyidzana zvinhu, vaongorori vekutanga vanowanzo tora pfungwa yesimba density. Iyi pfungwa, pamwero wekubatana, inomiririra simba rinoshanda pane chinangwa pane imwe unit unit, munyaya ye laser yezinga rimwechete, hurukuro iyi inokosha zvikuru.

Kune zvakare chikumbaridzo chesimba rehuwandu hweiyo imwe pulse jekiseni. Izvi zvakare zvinoita kuti kudzidza kwelaser-matter kupindirana kuve kwakaoma. Zvisinei, midziyo yemazuva ano yekuedza inogara ichichinja, zvakasiyana-siyana zvekuputika kwemhepo, simba rekuputika kwesimba, kudzokorora kakawanda uye mamwe maparameter ari kuramba achichinja, uye kunyange kufanira kufunga nezvekubuda chaiko kwelaser mune pulse simba rekuchinja munyaya yesimba remagetsi kuti riyere, rinogona kunge rakanyanya kuoma. kwete nzvimbo). Nekudaro, zviri pachena kuti iyo chaiyo laser waveform inogona kunge isiri rectangular, sikweya wave, kana bhero kana Gaussian, uye mamwe anotemerwa nezvimiro zvelaser pachayo, iyo yakanyanya kuumbwa.

Iyo pulse width inowanzopiwa nehafu yehupamhi yehupamhi inopiwa neoscilloscope (yakazara peak hafu-upamhi FWHM), iyo inotiita kuti tiverenge kukosha kwehuwandu hwemagetsi kubva kusimba remagetsi, iro rakakwirira. Iyo yakanyanya kukodzera hafu yehurefu uye hupamhi inofanirwa kuverengerwa neiyo yakakosha, hafu kureba uye hupamhi. Pakave pasina kubvunzurudzwa kwakadzama kana paine akakodzera nuance mwero wekuziva.Nekuda kwesimba remagetsi pacharo, paunenge uchiita masvomhu, zvinowanzogoneka kushandisa imwechete pulse simba kuverenga, imwe pulse simba / pulse wide/spot area, inova spatial avhareji simba, uyezve yakapetwa ne 2, nekuda kwenzvimbo yepamusoro peak simba (iyo nzvimbo yepamusoro-soro inodiwa kugovera, nzvimbo yepamusoro-inoda kugoverwa kwenzvimbo. saka), uyezve zvakapetwa nekutaura kwe radial kugovera, Uye wapedza.