Obosara Pulse nke Pulsed Lasers

Obosara pulse na-ezo aka n'oge pulse ahụ, oke ya na-abụkarị site na nanoseconds (ns, 10)^-9sekọnd) gaa na femtosekọnd (fs, 10)^-15sekọnd). Laser ndị a na-akpọ pulsed obosara pulse dị iche iche dabara adaba maka ọtụtụ ngwa:

- Obosara Pulse dị mkpụmkpụ (Picosecond/Femtosekọnd):

Ọ dị mma maka ịkpụzi ihe ndị na-adịghị ike (dịka ọmụmaatụ, iko, sapphire) iji belata mgbawa.

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

- Femtosecond Laser: A na-eji ya eme ịwa ahụ anya (dịka LASIK) n'ihi na ọ nwere ike ịkpụcha anya nke ọma ma ọ naghị emebi anụ ahụ gbara ya gburugburu.

- Ultrashort Puls: A na-eji ya amụ usoro mgbanwe dị oke ọsọ, dịka mkpọtụ molekul na mmeghachi omume kemịkalụ.

Obosara pulse na-emetụta arụmọrụ nke laser ahụ, dịka ike kachasị elu (P)_{ọnụ ọgụgụ kacha elu}= ike mkpali/obosara pulse. Ka obosara pulse dị mkpụmkpụ, otú ahụ ka ike kachasị elu maka otu ike otu pulse dị elu.) Ọ na-emetụtakwa mmetụta okpomọkụ: obosara pulse dị ogologo, dị ka nanoseconds, nwere ike ibute mkpokọta okpomọkụ na ihe, na-eduga na mgbaze ma ọ bụ mmebi okpomọkụ; obosara pulse dị mkpụmkpụ, dị ka picoseconds ma ọ bụ femtoseconds, na-eme ka "nhazi oyi" nwee mpaghara ndị metụtara okpomọkụ belatara.

Laser eriri na-achịkwa ma na-agbanwe obosara pulse site na iji usoro ndị a:

1. Q-Switching: Na-emepụta nanosecond pulses site n'ịgbanwe mfu resonator mgbe ụfọdụ iji mepụta pulses ike dị elu.

2. Mkpọchi Ụdị: Na-emepụta picosecond ma ọ bụ femtosecond ultrashort pulses site na ijikọ ụdị longitudinal dị n'ime resonator.

3. Ihe ndị na-agbanwe agbanwe ma ọ bụ mmetụta ndị na-abụghị ahịrị: Dịka ọmụmaatụ, iji Ntụgharị Polarization Nonlinear (NPR) na eriri ma ọ bụ ihe ndị na-amịkọrọ mmiri iji kpachie obosara pulse.