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

Ukadaulo wa laser wapita patsogolo mofulumira m'zaka zingapo zapitazi. Kuyambira pa nanosecond laser mpaka picosecond laser mpaka femtosecond laser, wakhala ukugwiritsidwa ntchito pang'onopang'ono popanga mafakitale, kupereka mayankho amitundu yonse ya moyo. Koma kodi mukudziwa zambiri za mitundu itatu iyi ya lasers? Tiyeni tipeze limodzi:

Matanthauzidwe a Nanosecond, Picosecond, ndi Femtosecond Lasers

Laser ya nanosecond inayamba kugwiritsidwa ntchito m'mafakitale kumapeto kwa zaka za m'ma 1990 monga ma laser a diode-pumped solid-state (DPSS). Komabe, ma laser oyamba otere anali ndi mphamvu yotsika yotulutsa ya ma watts ochepa komanso kutalika kwa mafunde kwa 355nm. Pakapita nthawi, msika wa ma laser a nanosecond wakula, ndipo ma laser ambiri tsopano ali ndi nthawi yothamanga ya pulse mu ma nanoseconds makumi mpaka mazana.

Laser ya Picosecond ndi laser yofupikitsa kwambiri yomwe imatulutsa ma pulse a picosecond-level. Ma laser amenewa amapereka ultra-short pulse width, ma frequency osinthika obwerezabwereza, mphamvu yayikulu ya pulse, ndipo ndi abwino kwambiri pakugwiritsa ntchito mu biomedicine, optical parametric oscillation, ndi biological microscopic imaging. M'machitidwe amakono ojambulira ndi kusanthula kwa biological, ma picosecond laser akhala zida zofunika kwambiri.

Laser ya Femtosecond ndi laser ya pulse yochepa kwambiri yokhala ndi mphamvu yayikulu kwambiri, yowerengedwa mu femtoseconds. Ukadaulo wapamwamba uwu wapatsa anthu mwayi watsopano woyesera wosayerekezeka ndipo uli ndi ntchito zambiri. Kugwiritsa ntchito laser ya femtosecond yolimba kwambiri, yofupikitsidwa pang'ono pofufuza ndikwabwino kwambiri pazochitika zosiyanasiyana zamakemikolo, kuphatikiza koma osati kokha kugawanika kwa ma bond, kupangika kwa ma bond atsopano, kusamutsa ma proton ndi ma electron, isomerization ya compound, kugawanika kwa ma molekyulu, liwiro, ngodya, ndi kugawa kwa zinthu zoyambira ndi zinthu zomaliza, machitidwe a mankhwala omwe amapezeka mu mayankho ndi momwe ma solvents amakhudzira, komanso mphamvu ya kugwedezeka ndi kuzungulira kwa ma molekyulu pazochitika zamakemikolo.

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) = 0.00000000000000001 masekondi = masekondi 10-15

Zipangizo zopangira laser za nanosecond, picosecond, ndi femtosecond zomwe zimapezeka pamsika zimatchulidwa kutengera nthawi. Zinthu zina, monga mphamvu ya pulse imodzi, kukula kwa pulse, kuchuluka kwa pulse, ndi mphamvu ya pulse peak, zimathandizanso posankha zida zoyenera zogwiritsira ntchito zipangizo zosiyanasiyana. Nthawi ikakhala yayifupi, mphamvu ya zinthuyo imakhala yochepa, zomwe zimapangitsa kuti zinthuzo zisamagwire bwino ntchito.

Kugwiritsa Ntchito Picosecond, Femtosecond, ndi Nanosecond Lasers Zachipatala

Ma laser a nanosecond amatenthetsa ndikuwononga melanin pakhungu, yomwe imachotsedwa m'thupi ndi maselo, zomwe zimapangitsa kuti zilonda za utoto zizitha. Njirayi imagwiritsidwa ntchito kwambiri pochiza matenda a utoto. Ma laser a Picosecond amagwira ntchito mwachangu kwambiri, kuswa tinthu ta melanin popanda kuwononga khungu lozungulira. Njirayi imagwira bwino ntchito pochiza matenda a utoto monga nevus of Ota ndi Brown cyan nevus. Femtosecond laser imagwira ntchito ngati ma pulses, omwe amatha kutulutsa mphamvu zambiri nthawi yomweyo, yabwino kwambiri pochiza myopia.

Dongosolo Loziziritsira la Picosecond, Femtosecond, ndi Nanosecond Lasers

Kaya ndi laser ya nanosecond, picosecond kapena femtosecond, ndikofunikira kuonetsetsa kuti mutu wa laser ukugwira ntchito bwino ndikulumikiza zidazo ndi choziziritsira cha laser . Zipangizo za laser zikamakhala zolondola kwambiri, kulondola kwa kutentha kumakhala kwakukulu. TEYU choziziritsira cha laser chothamanga kwambiri chimakhala ndi kukhazikika kwa kutentha kwa ±0.1°C komanso kuzizira mwachangu, zomwe zimatsimikizira kuti laser imagwira ntchito pa kutentha kosasintha komanso imakhala ndi mphamvu yokhazikika, motero imakweza moyo wa ntchito ya laser.TEYU zoziziritsa laser zothamanga kwambiri ndi oyenera mitundu yonse itatu ya zida za laser.