Ububanzi bePulse yeeLaser eziPulsed

Ububanzi bepulse bubhekisa kubude bepulse, kwaye uluhlu luhlala luqala kwi-nanoseconds (ns, 10^-9imizuzwana) ukuya kwi-femtoseconds (fs, 10^-15imizuzwana). Iilaser ezityhalwayo ezinobubanzi obahlukeneyo bepulse zifanelekile kwiindlela ezahlukeneyo zokusebenza:

- Ububanzi obufutshane bePulse (iPicosecond/iFemtosecond):

Ilungele ukucutshungulwa ngokuchanekileyo kwezinto ezibuthathaka (umz., iglasi, isafire) ukuze kuncitshiswe imifantu.

- Ububanzi bePulse ende (Nanosecond): Ifanelekile ukusika isinyithi, ukuwelda, kunye nezinye izinto apho kufuneka khona iziphumo zobushushu.

- I-Femtosecond Laser: Isetyenziswa kwiindlela zotyando lwamehlo (ezifana ne-LASIK) kuba inokwenza amanxeba achanekileyo ngaphandle kokwenza umonakalo omkhulu kwizicwili ezingqongileyo.

- Iipulses ezimfutshane kakhulu: Zisetyenziselwa ukufunda iinkqubo ezikhawulezayo kakhulu, ezifana nokungcangcazela kweemolekyuli kunye neempendulo zeekhemikhali.

Ububanzi be-pulse buchaphazela ukusebenza kwe-laser, njengamandla e-peak (P)_incopho= amandla okubetha/ububanzi be-pulse. Okukhona ububanzi be-pulse bufutshane, kokukhona amandla aphezulu e-peak yamandla afanayo e-single-pulse.) Ikwachaphazela nemiphumo yobushushu: ububanzi be-pulse obude, njenge-nanoseconds, bunokubangela ukuqokelelana kobushushu kwizinto, okukhokelela ekunyibilikeni okanye ekonakaleni kobushushu; ububanzi be-pulse obufutshane, njenge-picoseconds okanye i-femtoseconds, buvumela "ukucubungula okubandayo" ngeendawo ezincitshisiweyo ezichaphazeleka bubushushu.

Iilaser zefayibha zihlala zilawula kwaye zilungisa ububanzi be-pulse zisebenzisa ezi ndlela zilandelayo:

1. Q-Switching: Ivelisa ii-nanosecond pulses ngokutshintsha rhoqo ilahleko ze-resonator ukuze ivelise ii-pulses ezinamandla aphezulu.

2. I-Mode-Locking: Ivelisa ii-picosecond okanye ii-femtosecond ultrashort pulses ngokuvumelanisa ii-longitudinal modes ngaphakathi kwe-resonator.

3. IiModulators okanye iiNonlinear Effects: Umzekelo, ukusebenzisa iNonlinear Polarization Rotation (NPR) kwiifayibha okanye ii-saturable absorbers ukucinezela ububanzi be-pulse.