Koj puas paub qhov txawv ntawm Nanosecond, Picosecond thiab Femtosecond Lasers?

Cov thev naus laus zis laser tau nce qib sai heev nyob rau ob peb xyoos dhau los. Txij li nanosecond laser mus rau picosecond laser mus rau femtosecond laser, nws tau maj mam siv rau hauv kev tsim khoom lag luam, muab cov kev daws teeb meem rau txhua qhov chaw ntawm lub neej. Tab sis koj paub ntau npaum li cas txog 3 hom lasers no? Cia peb nrhiav ua ke:

Cov Lus Txhais ntawm Nanosecond, Picosecond, thiab Femtosecond Lasers

Nanosecond laser tau pib siv rau hauv kev lag luam thaum xyoo 1990s lig ua diode-pumped solid-state (DPSS) lasers. Txawm li cas los xij, thawj cov lasers zoo li no muaj lub zog tso zis qis ntawm ob peb watts thiab wavelength ntawm 355nm. Raws li lub sijhawm dhau mus, kev ua lag luam rau nanosecond lasers tau loj hlob, thiab feem ntau cov lasers tam sim no muaj lub sijhawm pulse hauv kaum txog pua pua nanoseconds.

Picosecond laser yog ib lub laser luv luv uas tso tawm cov pulses theem picosecond. Cov lasers no muaj qhov dav luv luv, zaus rov ua dua tshiab, lub zog pulse siab, thiab zoo tagnrho rau kev siv hauv biomedicine, optical parametric oscillation, thiab biological microscopic imaging. Hauv cov kab ke niaj hnub no biological imaging thiab kev tshuaj xyuas, picosecond lasers tau dhau los ua cov cuab yeej tseem ceeb.

Femtosecond laser yog ib lub laser luv luv uas muaj zog heev, suav ua femtoseconds. Cov thev naus laus zis siab heev no tau muab rau tib neeg cov kev sim tshiab uas tsis tau muaj dua thiab muaj kev siv dav. Kev siv lub laser femtosecond muaj zog heev, luv luv rau kev kuaj pom yog qhov zoo tshwj xeeb rau ntau yam tshuaj lom neeg, suav nrog tab sis tsis txwv rau kev sib txuas, kev tsim cov ntawv cog lus tshiab, kev hloov pauv proton thiab electron, kev sib xyaw isomerization, kev sib cais molecular, qhov ceev, lub kaum sab xis, thiab lub xeev faib ntawm cov tshuaj tiv thaiv intermediates thiab cov khoom kawg, cov tshuaj tiv thaiv tshwm sim hauv cov tshuaj thiab qhov cuam tshuam ntawm cov kuab tshuaj, nrog rau kev cuam tshuam ntawm kev co molecular thiab kev tig rau cov tshuaj tiv thaiv.

Cov Chav Hloov Sijhawm rau Nanoseconds, Picoseconds, thiab Femtoseconds

1ns (nanosecond) = 0.0000000001 vib nas this = 10-9 vib nas this

1ps (picosecond) = 0.0000000000001 vib nas this = 10-12 vib nas this

1fs (femtosecond) = 0.000000000000001 vib nas this = 10-15 vib nas this

Cov khoom siv ua laser nanosecond, picosecond, thiab femtosecond uas feem ntau pom hauv kev ua lag luam raug muab npe raws li lub sijhawm. Lwm yam tseem ceeb, xws li lub zog ntawm ib lub pulse, qhov dav ntawm lub pulse, zaus ntawm lub pulse, thiab lub zog ntawm lub pulse ncov, kuj tseem ua lub luag haujlwm hauv kev xaiv cov khoom siv tsim nyog rau kev ua cov ntaub ntawv sib txawv. Lub sijhawm luv dua, qhov cuam tshuam tsawg dua rau ntawm qhov chaw ntawm cov khoom, ua rau muaj kev ua haujlwm zoo dua.

Cov Kev Siv Kho Mob ntawm Picosecond, Femtosecond, thiab Nanosecond Lasers

Nanosecond lasers xaiv qhov kub thiab rhuav tshem melanin hauv daim tawv nqaij, uas tom qab ntawd raug tshem tawm ntawm lub cev los ntawm lub cev, ua rau cov xim ploj mus. Txoj kev no feem ntau siv rau kev kho mob pigmentation disorders. Picosecond lasers ua haujlwm ntawm qhov ceev ceev, rhuav tshem cov melanin me me yam tsis ua rau daim tawv nqaij ib puag ncig puas tsuaj. Txoj kev no kho tau cov kab mob pigmented xws li nevus ntawm Ota thiab Brown cyan nevus. Femtosecond laser ua haujlwm hauv daim ntawv ntawm pulses, uas tuaj yeem tso tawm lub zog loj heev hauv ib pliag, zoo rau kev kho mob myopia.

Lub Tshuab Txias rau Picosecond, Femtosecond, thiab Nanosecond Lasers

Txawm yog lub nanosecond, picosecond lossis femtosecond laser los xij, nws yog qhov tsim nyog los xyuas kom meej tias lub taub hau laser ua haujlwm li qub thiab txuas cov khoom siv nrog a lub tshuab cua txias laser . Cov khoom siv laser raug dua, qhov kev tswj kub raug dua. TEYU lub tshuab cua txias laser ceev ceev muaj qhov kub ruaj khov ntawm ± 0.1 ° C thiab txias sai, uas ua kom ntseeg tau tias lub laser ua haujlwm ntawm qhov kub tas li thiab muaj cov zis teeb tsa ruaj khov, yog li txhim kho lub neej kev pabcuam ntawm lub laser.TEYU cov tshuab cua txias laser ceev ceev yog tsim rau tag nrho peb hom khoom siv laser no.