Bophara ba Pulse ba Li-Laser tse Pulsed

Bophara ba pulse bo bolela nako ea pulse, 'me sebaka seo hangata se tloha ho nanoseconds (ns, 10).^-9metsotsoana) ho isa ho metsotsoana ea femto (fs, 10^-15metsotsoana). Li-laser tse pulsed tse nang le bophara bo fapaneng ba pulse li loketse lits'ebetso tse fapaneng:

- Bophara bo Bokhutšoanyane ba Pulse (Picosecond/Femtosecond):

E loketse bakeng sa ho lokisa ka nepo thepa e senyehang habonolo (mohlala, khalase, safire) ho fokotsa mapetso.

- Bophara ba Pulse e Telele (Nanosecond): E loketse ho seha tšepe, ho tjheseletsa, le lits'ebetso tse ling moo ho hlokahalang litlamorao tsa mocheso.

- Femtosecond Laser: E sebelisoa liopereisheneng tsa mahlo (joalo ka LASIK) hobane e ka etsa maqeba a nepahetseng ka tšenyo e nyane liseleng tse potolohileng.

- Li-pulses tse khutšoanyane: Li sebelisetsoa ho ithuta lits'ebetso tse matla tse potlakileng haholo, tse kang ho thothomela ha limolek'hule le liketso tsa lik'hemik'hale.

Bophara ba pulse bo ama ts'ebetso ea laser, joalo ka matla a tlhōrō (P_tlhoro= matla a ho otla/bophara ba ho otla. Ha bophara ba ho otla bo le bokgutshwane, matla a tlhoro a matla a tshwanang a ho otla ha pelo a le mong a ba a hodimo.) E boetse e ama ditlamorao tsa mocheso: bophara ba ho otla ha pelo bo bolelele, jwalo ka nanoseconds, bo ka baka ho bokellana ha mocheso thepa, e leng se lebisang tshenyong ya ho qhibiliha kapa ya mocheso; bophara ba ho otla ha pelo bo bokgutshwane, jwalo ka picoseconds kapa femtoseconds, bo nolofalletsa "tshebetso e batang" ka dibaka tse fokotsehileng tse amehileng ke mocheso.

Hangata li-laser tsa fiber li laola le ho fetola bophara ba pulse li sebelisa mekhoa e latelang:

1. Q-Switching: E ​​hlahisa di-pulse tsa nanosecond ka ho fetola tahlehelo ya resonator nako le nako ho hlahisa di-pulse tse nang le matla a mangata.

2. Mokhoa-Ho Notlela: E hlahisa li-pulse tse khutšoane tsa picosecond kapa femtosecond ka ho hokahanya mekhoa ea longitudinal ka hare ho resonator.

3. Di-Modulator kapa Ditlamorao tse sa Lekanyetsoang: Mohlala, ho sebedisa Nonlinear Polarization Rotation (NPR) ka hara difaeba kapa di-absorber tse kgorisang ho hatella bophara ba pulse.