Na U Tseba Phapang Pakeng tsa Nanosecond, Picosecond le Femtosecond Lasers?

Theknoloji ea laser e hatetse pele ka potlako lilemong tse mashome a 'maloa tse fetileng. Ho tloha ho nanosecond laser ho ea ho picosecond laser ho ea ho femtosecond laser, e 'nile ea sebelisoa butle-butle tlhahisong ea indasteri, e fana ka litharollo bakeng sa maemo 'ohle a bophelo. Empa u tseba hakae ka mefuta ena e 3 ea laser? A re fumaneng hammoho:

Litlhaloso tsa Nanosecond, Picosecond, le Femtosecond Lasers

Laser ea nanosecond e ile ea qala ho hlahisoa lefapheng la indasteri qetellong ea lilemo tsa bo-1990 e le li-laser tsa diode-pumped solid-state (DPSS). Leha ho le joalo, li-laser tsa pele tse joalo li ne li e-na le matla a tlhahiso a tlase a li-watts tse 'maloa le bolelele ba maqhubu ba 355nm. Ha nako e ntse e ea, 'maraka oa li-laser tsa nanosecond o holile,' me boholo ba li-laser hona joale li na le nako ea ho otla ha pulse ka mashome ho isa ho makholo a nanoseconds.

Laser ea Picosecond ke laser e nang le bophara ba pulse bo bokhutšoanyane haholo e ntšang li-pulse tsa boemo ba picosecond. Li-laser tsena li fana ka bophara ba pulse bo bokhutšoanyane haholo, maqhubu a pheta-phetoang a fetoloang, matla a phahameng a pulse, 'me li loketse lits'ebetsong tsa biomedicine, optical parametric oscillation, le baeloji microscopic imaging. Litsamaisong tsa sejoale-joale tsa ho nka litšoantšo tsa baeloji le tlhahlobo, li-laser tsa picosecond li fetohile lisebelisoa tsa bohlokoa haholo.

Laser ea Femtosecond ke laser ea pulse e khutšoanyane haholo e nang le matla a phahameng haholo, e baloang ka metsotsoana ea femtosecond. Theknoloji ena e tsoetseng pele e file batho menyetla e mecha ea liteko e e-s'o ka e bonoa 'me e na le lits'ebetso tse pharaletseng. Tšebeliso ea laser ea femtosecond e matla haholo, e nang le pulse e khutšoanyane bakeng sa merero ea ho lemoha e molemo haholo bakeng sa liketso tse fapaneng tsa lik'hemik'hale, ho kenyeletsoa empa ho sa felle feela ho karohano ea bond, ho thehoa ha bond e ncha, phetisetso ea proton le elektrone, isomerization ea metsoako, karohano ea limolek'hule, lebelo, sekhutlo le kabo ea boemo ba li-intermediate tsa karabelo le lihlahisoa tsa ho qetela, liketso tsa lik'hemik'hale tse hlahang litharollong le tšusumetso ea li-solvents, hammoho le tšusumetso ea ho thothomela le ho potoloha ha limolek'hule liketsong tsa lik'hemik'hale.

Diyuniti tsa Phetoho ea Nako bakeng sa Nanoseconds, Picoseconds, le Femtoseconds

1ns (nanosecond) = 0.0000000001 metsotsoana = metsotsoana e 10-9

1ps (picosecond) = 0.00000000000001 metsotsoana = metsotsoana e 10-12

1fs (femtosecond) = 0.000000000000000001 metsotsoana = metsotsoana e 10-15

Lisebelisoa tsa ho sebetsana le laser tsa nanosecond, picosecond, le femtosecond tse atisang ho bonoa 'marakeng li rehelloa mabitso ho latela nako. Mabaka a mang, joalo ka matla a pulse a le mong, bophara ba pulse, maqhubu a pulse, le matla a pulse peak, le tsona li bapala karolo ho khethoeng ha lisebelisoa tse loketseng bakeng sa ho sebetsana le lisebelisoa tse fapaneng. Ha nako e le khutšoanyane, tšusumetso e fokolang holim'a thepa, e leng se fellang ka phello e betere ea ts'ebetso.

Litšebeliso tsa Bongaka tsa Picosecond, Femtosecond, le Nanosecond Lasers

Li-laser tsa nanosecond li futhumatsa le ho senya melanin letlalong ka ho khetha, ebe lisele lia e ntša 'meleng, e leng se fellang ka ho fifala ha liso tse nang le 'mala. Mokhoa ona o sebelisoa hangata bakeng sa kalafo ea mathata a ho fifala ha 'mala. Li-laser tsa Picosecond li sebetsa ka lebelo le phahameng, li qhaqha likaroloana tsa melanin ntle le ho senya letlalo le potolohileng. Mokhoa ona o phekola maloetse a nang le 'mala ka katleho joalo ka nevus ea Ota le Brown cyan nevus. Laser ea Femtosecond e sebetsa ka mokhoa oa li-pulses, tse ka ntšang matla a maholo hang-hang, e leng se setle bakeng sa kalafo ea myopia.

Sistimi ea ho Pholisa bakeng sa Picosecond, Femtosecond, le Nanosecond Lasers

Ho sa tsotelehe laser ea nanosecond, picosecond kapa femtosecond, hoa hlokahala ho netefatsa ts'ebetso e tloaelehileng ea hlooho ea laser le ho kopanya lisebelisoa le sehatsetsi sa laser . Ha thepa ea laser e nepahetse haholoanyane, ho nepahala ha taolo ea mocheso ho phahame. TEYU ultrafast laser chiller e na le botsitso ba mocheso ba ±0.1°C le pholiso e potlakileng, e leng se netefatsang hore laser e sebetsa mochesong o sa fetoheng 'me e na le tlhahiso e tsitsitseng ea mahlaseli, ka hona e ntlafatsa bophelo ba ts'ebeletso ea laser.TEYU li-chiller tsa laser tse potlakileng haholo li loketse mefuta ena eohle e meraro ea lisebelisoa tsa laser.