Kodi Mumadziwa Kusiyana Pakati pa Nanosecond, Picosecond ndi Femtosecond Lasers?

Tekinoloje ya laser yapita patsogolo kwambiri pazaka makumi angapo zapitazi. Kuchokera ku laser ya nanosecond kupita ku laser ya picosecond mpaka laser ya femtosecond, yakhala ikugwiritsidwa ntchito pang'onopang'ono popanga mafakitale, ndikupereka mayankho amitundu yonse. Koma mumadziwa bwanji za mitundu itatu iyi ya lasers? Tiyeni tifufuze limodzi:

Matanthauzo a Nanosecond, Picosecond, ndi Femtosecond Lasers

Nanosecond laser idayambitsidwa koyamba m'mafakitale kumapeto kwa zaka za m'ma 1990 ngati ma laser a diode-pumped solid-state (DPSS). Komabe, ma lasers oyamba otere anali ndi mphamvu zochepa zotulutsa ma watts ochepa komanso kutalika kwa 355nm. Popita nthawi, msika wama nanosecond lasers wakula, ndipo ma lasers ambiri tsopano ali ndi nthawi yothamanga mu makumi mpaka mazana a nanoseconds.

Picosecond laser  ndi laser yaifupi kwambiri ya pulse wide yomwe imatulutsa ma picosecond-level pulses. Ma lasers awa amapereka ultra-short pulse wide, kubwerezabwereza kosinthika, mphamvu zothamanga kwambiri, ndipo ndi abwino kwa ntchito za biomedicine, optical parametric oscillation, ndi biological microscopic imaging. M'machitidwe amakono oyerekeza ndi kusanthula kwachilengedwe, ma laser a picosecond akhala zida zofunika kwambiri.

Femtosecond laser ndi laser ultra-short pulse laser yokhala ndi mphamvu yayikulu modabwitsa, yowerengedwa mu ma femtoseconds. Ukadaulo wapamwambawu wapatsa anthu mwayi watsopano woyesera womwe sunachitikepo m'mbuyomu ndipo uli ndi ntchito zambiri. Kugwiritsa ntchito laser yamphamvu kwambiri, yaifupi ya femtosecond laser pazifukwa zodziwikira kumakhala kopindulitsa kwambiri pamachitidwe osiyanasiyana amankhwala, kuphatikiza koma osalekeza kuphatikizika kwa bond, mapangidwe atsopano, proton ndi kusamutsa ma elekitironi, isomerization yapawiri, kutha kwa mamolekyulu, liwiro, ngodya, ndi kugawa kwazomwe zimachitika pakati ndi zinthu zomaliza, kaphatikizidwe kakemidwe kamene kamakhudzidwa ndi kutha kwa ma molekyulu. ndi kasinthasintha pa zochita za mankhwala.

Magawo Osinthira Nthawi a Nanoseconds, Picoseconds, ndi Femtoseconds

1ns (nanosecond) = 0.0000000001 masekondi = 10-9 masekondi

1ps (picosecond) = 0.00000000000001 masekondi = 10-12 masekondi

1fs (femtosecond) = 0.000000000000001 masekondi = 10-15 masekondi

Zida zopangira laser za nanosecond, picosecond, ndi femtosecond zomwe zimawoneka pamsika zimatchedwa kutengera nthawi. Zinthu zina, monga mphamvu ya pulse imodzi, kugunda kwa mtima, kugunda kwafupipafupi, ndi mphamvu yothamanga kwambiri, zimagwiranso ntchito posankha zipangizo zoyenera pokonza zipangizo zosiyanasiyana. Kufupikitsa nthawi, kumapangitsa kuti zinthu zizikhala bwino, zomwe zimapangitsa kuti pakhale bwino.

Kugwiritsa Ntchito Zachipatala kwa Picosecond, Femtosecond, ndi Nanosecond Lasers

Nanosecond lasers kusankha kutentha ndi kuwononga melanin pakhungu, amene kenako inathetsedwa m'thupi ndi maselo, chifukwa cha kuwonongeka pigmented zotupa. Njirayi imagwiritsidwa ntchito kwambiri pochiza matenda a pigmentation. Ma laser a Picosecond amagwira ntchito mwachangu kwambiri, ndikuphwanya tinthu tating'onoting'ono ta melanin popanda kuwononga khungu lozungulira. Njira imeneyi bwino amachitira pigmented matenda monga nevus wa Ota ndi Brown cyan nevus.Femtosecond laser ukugwira ntchito mu mawonekedwe a zimachitika, amene akhoza zimatulutsa yaikulu mphamvu yomweyo, chachikulu zochizira myopia.

Dongosolo Lozizira la Picosecond, Femtosecond, ndi Nanosecond Lasers

Ziribe kanthu nanosecond, picosecond kapena femtosecond laser, ndikofunikira kuwonetsetsa kuti mutu wa laser umagwira ntchito bwino ndikuphatikiza zida ndi  laser chiller . Zida za laser zolondola kwambiri, zimakweza kuwongolera kutentha. TEYU ultrafast laser chiller imakhala ndi kukhazikika kwa kutentha kwa ± 0.1 ° C komanso kuzizira kofulumira, komwe kumatsimikizira kuti laser imagwira ntchito kutentha kosalekeza ndipo imakhala ndi mtengo wokhazikika, potero imakweza moyo wautumiki wa laser.  TEYU ultrafast laser chillers  ndi oyenera mitundu itatu iyi ya zida za laser.