Ulawulo lwefrikhwensi yepulse yeiteknoloji yokulawula i-pulse ye-laser
1. Ingcamango ye-pulse frequency, i-laser pulse Rate (i-Pulse Repetition Rate) ibhekisa kwinani lee-laser pulses ezikhutshwayo ngexesha leyunithi nganye, ngesiqhelo kwi-Hertz (Hz). Ii-high frequency pulses zifanelekile kwizicelo ze-high repetition rate, ngelixa ii-low frequency pulses zifanelekile kwi-high energy single pulse tasks.
2. Ubudlelwane phakathi kwamandla, ububanzi be-pulse kunye ne-frequency Ngaphambi kolawulo lwe-laser frequency, ubudlelwane phakathi kwamandla, ububanzi be-pulse kunye ne-frequency kufuneka buchazwe kuqala. Kukho intsebenziswano enzima phakathi kwamandla e-laser, i-frequency kunye nobubanzi be-pulse, kwaye ukulungisa enye yeeparameter kudla ngokufuna ukuqwalasela ezinye iiparameter ezimbini ukuze kuphuculwe isiphumo sesicelo.
3. Iindlela eziqhelekileyo zokulawula i-pulse frequency
a. Imo yokulawula yangaphandle ilayisha isignali yefrikhwensi ngaphandle kombane, kwaye ilungisa ifrikhwensi ye-laser pulse ngokulawula ifrikhwensi kunye nomjikelo womsebenzi wesignali yokulayisha. Oku kuvumela i-output pulse ukuba ihambelane nesignali yomthwalo, nto leyo eyenza ifaneleke kwizicelo ezifuna ulawulo oluchanekileyo.
b. Imo yokulawula yangaphakathi Isignali yokulawula i-frequency yakhelwe kumbane we-drive, ngaphandle kokufaka uphawu lwangaphandle olongezelelweyo. Abasebenzisi banokukhetha phakathi kwe-frequency eyakhelwe ngaphakathi okanye i-frequency yokulawula yangaphakathi ehlengahlengiswayo ukuze kube lula ngakumbi.
c. Ukulungisa ubude be-resonator okanyei-modulator ye-electro-opticalIimpawu zefrikhwensi yelaser zingatshintshwa ngokulungisa ubude be-resonator okanye ngokusebenzisa i-electro-optical modulator. Le ndlela yokulawula ifrikhwensi ephezulu idla ngokusetyenziswa kwizicelo ezifuna amandla aphezulu aphakathi kunye nobubanzi obufutshane be-pulse, njenge-laser micromachining kunye ne-medical imaging.
d. I-Acousto optic Modulator(i-AOM Modulator) sisixhobo esibalulekileyo sokulawula i-pulse frequency yetekhnoloji yokulawula i-laser pulse.I-AOM Modulatorisebenzisa isiphumo se-acousto optic (oko kukuthi, uxinzelelo lwe-mechanical oscillation lwezandi zesandi lutshintsha i-refractive index) ukuguqula nokulawula umqadi welaser.
4. Itekhnoloji yokuguqula i-Intracavity, xa ithelekiswa nokuguqulwa kwangaphandle, ukuguquguquka kwe-intracavity kunokuvelisa amandla aphezulu, amandla aphezului-pulse laserEzi zilandelayo ziindlela ezine eziqhelekileyo zokuguqula i-intracavity:
a. Ukutshintsha kweGain ngokuguqula ngokukhawuleza umthombo wepompo, i-gain medium particle number inversion kunye ne-gain coefficient zimiselwa ngokukhawuleza, zidlule izinga lemitha elivuselelweyo, nto leyo ebangela ukwanda okukhulu kwee-photons kwindawo kunye nokuveliswa kwe-short pulse laser. Le ndlela ixhaphake kakhulu kwi-semiconductor lasers, enokuvelisa ii-pulses ukusuka kwi-nanoseconds ukuya kwi-tens of picoseconds, ngesantya sokuphindaphinda se-gigahertz ezininzi, kwaye isetyenziswa kakhulu kwicandelo lonxibelelwano lwe-optical kunye namazinga aphezulu okudluliselwa kwedatha.
Iswitshi ye-Q (ukutshintsha kwe-Q) Iiswitshi ze-Q zicinezela impendulo ye-optical ngokungenisa ilahleko ephezulu kwi-laser cavity, okuvumela inkqubo yokupompa ukuba ivelise ukuguquka kwenani lamasuntswana ngaphaya komda, igcina amandla amaninzi. Emva koko, ilahleko kwi-cavity iyancipha ngokukhawuleza (oko kukuthi, ixabiso le-Q le-cavity liyandiswa), kwaye impendulo ye-optical ivulwa kwakhona, ukuze amandla agciniweyo akhutshwe ngendlela yee-pulses ezimfutshane kakhulu.
c. I-Mode Locking ivelisa ii-pulses ezimfutshane kakhulu ze-picosecond okanye i-femtosecond level ngokulawula ubudlelwane besigaba phakathi kweendlela ezahlukeneyo ze-longitudinal kwi-laser cavity. Itekhnoloji ye-mode-locking yahlulwe kwi-passive mode-locking kunye ne-active mode-locking.
d. Ukulahla iCavity Ngokugcina amandla kwiiphoton kwi-resonator, kusetyenziswa isibuko se-cavity esiphantsi ukubopha iiphoton ngokufanelekileyo, ukugcina imeko yokulahleka okuphantsi kwi-cavity ixesha elithile. Emva komjikelo omnye wokujikeleza, i-pulse enamandla "iyalahlwa" ngaphandle kwe-cavity ngokutshintsha ngokukhawuleza i-internal cavity element, njenge-acousto-optic modulator okanye i-electro-optic shutter, kwaye kukhutshwa i-laser emfutshane ye-pulse. Xa kuthelekiswa ne-Q-switching, i-cavity emptying inokugcina ububanzi be-pulse ye-nanoseconds ezininzi kwizinga eliphezulu lokuphindaphinda (njenge-megahertz ezininzi) kwaye ivumele amandla aphezulu e-pulse, ngakumbi kwizicelo ezifuna amazinga aphezulu okuphindaphinda kunye ne-short pulses. Idityaniswe nezinye iindlela zokuvelisa i-pulse, amandla e-pulse anokuphuculwa ngakumbi.
Ulawulo lwepulse yeilezayinkqubo enzima nebalulekileyo, equka ulawulo lobubanzi be-pulse, ulawulo lwe-pulse frequency kunye neendlela ezininzi zokuguqula. Ngokukhetha okufanelekileyo kunye nokusetyenziswa kwezi ndlela, ukusebenza kwe-laser kunokulungiswa ngokuchanekileyo ukuze kuhlangatyezwane neemfuno zeemeko ezahlukeneyo zesicelo. Kwixesha elizayo, ngokuvela okuqhubekayo kwezinto ezintsha kunye nobuchwepheshe obutsha, iteknoloji yokulawula i-pulse ye-laser iya kuzisa impumelelo engaphezulu, kwaye ikhuthaze uphuhliso lweiteknoloji yelaserkwicala lokuchaneka okuphezulu kunye nokusetyenziswa okubanzi.
Ixesha leposi: Matshi-25-2025