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 zvakare kusangana kwedu nehuwandu hwemuviri, nekuti isu tinoshandisa magetsi zuva rega rega, magetsi anosanganisira simba, iyo yepasirese standard unit yesimba W, kureva, J / s, chiyero chesimba uye nguva unit, iyo international standard unit of energy is J. Saka simba density ipfungwa yekubatanidza simba uye density, asi heino irradiation nzvimbo yenzvimbo kwete vhoriyamu, simba rakakamurwa nenzvimbo yekubuda kwenzvimbo isimba remagetsi, ndiko kuti. , iyo unit yesimba density iW/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 kwepfupi pulse (inogona kutariswa seyedu nhanho), yekupedzisira-ipfupi pulse (iyo inogona kutorwa senhanho yens), uye kunyange yekupedzisira-yekukurumidza (ps uye fs nhanho) laser yekudyidzana zvinhu, vaongorori vekutanga kazhinji. 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. Nekudaro, zvigadzirwa zvemazuva ano zvekuyedza zvinogara zvichichinja, akasiyana pulse hupamhi, imwechete pulse simba, kudzokorora frequency uye mamwe ma paramita ari kugara achichinja, uye anotoda kufunga nezvekubuda chaiko kwelaser mune pulse simba rekuchinja mune yesimba density. kuyera, kungave kwakakasharara.Kazhinji, zvinogona kurangarirwa kuti simba remagetsi rakakamurwa nehupamhi hwepuruzi ndiyo nguva yeavhareji simba density (ona kuti inguva, 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 pamusoro pekuti pane chiyero chemunuance chakakodzera chekuziva.Nekuda kwesimba remagetsi pacharo, pakuita masvomhu, zvinowanzogoneka kushandisa simba rimwechete rekupuruzira kuverengera, simba rimwechete / pulse wide / spot area. , inova simba repakati pepakati, uyezve yakawedzera ne2, yesimba repamusoro penzvimbo (kugovera kwenzvimbo ndeyeGauss kugovera ndiko kurapwa kwakadaro, heti-yepamusoro haidi kudaro), uyezve yakapetwa nekutaura kweradial kugovera. , Uye wapedza.