Ogologo Pulse nke Lasers Pulsed

Obosara usu na-ezo aka na ogologo oge nke pulse, na oke na-adịkarị site na nanoseconds (ns, 10).^-9sekọnd) ruo femtoseconds (fs, 10^-15sekọnd). Laser pulsed nwere obosara usu dị iche iche dabara maka ngwa dị iche iche:

- Obosara usu dị mkpụmkpụ (Picosecond/Femtosecond):

Ọ dị mma maka nhazi nkenke nke ihe ndị na-emebi emebi (dịka, iko, sapphire) iji belata mgbawa.

- Ogologo Pulse Ogologo (Nanosecond): Kwesịrị ekwesị maka ịkpụ ígwè, ịgbado ọkụ na ngwa ndị ọzọ ebe achọrọ mmetụta okpomọkụ.

- Femtosecond Laser: A na-eji ya na ịwa ahụ anya (dị ka LASIK) n'ihi na ọ nwere ike ime mbelata nke ọma na obere mmebi nke anụ ahụ gbara ya gburugburu.

- Ultrashort Pulses: A na-eji amụ usoro ike dị ike, dị ka vibrations molecular na mmeghachi omume kemịkal.

Obosara usu na-emetụta arụmọrụ nke laser, dị ka ike kacha elu (P_elu= ike usu / usu obosara. N'ịdị mkpụmkpụ nke obosara nke pulse, nke dị elu nke ike elu maka otu ike otu-pulse ike.) Ọ na-emetụtakwa mmetụta okpomọkụ: ogologo obosara obosara, dị ka nanoseconds, nwere ike ime ka ikpokọta okpomọkụ na ihe, na-eduga n'ịgbaze ma ọ bụ mmebi okpomọkụ; obosara usu dị mkpụmkpụ, dị ka picoseconds ma ọ bụ femtoseconds, mee ka "nhazi oyi" na mpaghara okpomọkụ emetụtara belata.

Fiber lasers na-achịkwa ma mezie obosara pulse site na iji usoro ndị a:

1. Q-Switching: Na-emepụta nanosecond pulses site n'oge ụfọdụ na-agbanwe mfu resonator iji mepụta ume dị elu.

2. Mkpọchi ọnọdụ: Na-emepụta picosecond ma ọ bụ femtosecond ultrashort pulses site na imekọrịta ụdị ogologo ogologo n'ime resonator.

3. Modulators ma ọ bụ Mmetụta Na-adịghị Anya: Dịka ọmụmaatụ, iji Noonlinear Polarization Rotation (NPR) na eriri ma ọ bụ ihe ntinye saturable iji mpikota onu obosara usu.