Ububanzi be-Pulse yama-Laser a-Pulsed

Ububanzi be-pulse bubhekisela esikhathini sokushaya kwenhliziyo, futhi ububanzi buvame ukusabalala kusukela kumasekhondi amancane (ns, 10^-9imizuzwana) kuya kuma-femtoseconds (fs, 10^-15imizuzwana). Ama-laser ashukunyiswayo anobubanzi obuhlukene bokushaya kwenhliziyo afaneleka ezinhlelweni ezahlukene:

- Ububanzi Bokushaya Okufushane (i-Picosecond/i-Femtosecond):

Kuhle kakhulu ekulungiseni izinto ezibuthakathaka (isb. ingilazi, isafire) ukuze kuncishiswe imifantu.

- Ububanzi Bokushaywa Okude (Nanosecond): Kufanelekile ukusika insimbi, ukushisela, kanye nezinye izinhlelo zokusebenza lapho kudingeka khona imiphumela yokushisa.

- I-Femtosecond Laser: Isetshenziswa ekuhlinzweni kwamehlo (njenge-LASIK) ngoba ingenza ukusikeka okunembile ngaphandle komonakalo omkhulu ezicutshini ezizungezile.

- Ama-Ultrashort Pulses: Asetshenziswa ukutadisha izinqubo ezishintshashintshayo ezisheshayo, njengokudlidliza kwama-molecule kanye nokusabela kwamakhemikhali.

Ububanzi be-pulse buthinta ukusebenza kwe-laser, njengamandla aphezulu (P)._isiqongo= amandla okushaya kwenhliziyo/ububanzi bokushaya kwenhliziyo. Uma ububanzi bokushaya kwenhliziyo bufushane, kulapho amandla aphezulu aphezulu amandla afanayo okushaya kwenhliziyo okukodwa.) Kuphinde kuthonye imiphumela yokushisa: ububanzi bokushaya kwenhliziyo obude, njengemizuzwana emincane, bungabangela ukuqongelela kokushisa ezintweni, okuholela ekuncibilikeni noma ekulimaleni kokushisa; ububanzi bokushaya kwenhliziyo obufushane, njengemizuzwana emifushane noma imizuzwana emincane, kuvumela "ukucubungula okubandayo" ngezindawo ezincishisiwe ezithintekile ukushisa.

Ama-laser e-fiber ngokuvamile alawula futhi alungise ububanzi be-pulse esebenzisa amasu alandelayo:

1. I-Q-Switching: Ikhiqiza ama-pulse e-nanosecond ngokushintsha njalo ukulahlekelwa kwe-resonator ukuze ikhiqize ama-pulse anamandla aphezulu.

2. I-Mode-Locking: Ikhiqiza ama-pulse amafushane e-picosecond noma e-femtosecond ngokuvumelanisa ama-longitudinal modes ngaphakathi kwe-resonator.

3. Ama-Modulators noma Imiphumela Engeyona Eyomugqa: Isibonelo, ukusebenzisa i-Nonlinear Polarization Rotation (NPR) kuma-fiber noma ama-absorber agcwele ukucindezela ububanzi be-pulse.