Ukulawulwa kwemvamisa yokushaya kwenhliziyoubuchwepheshe bokulawula ukushaya kwe-laser
1. Umqondo we-Pulse frequency, i-laser pulse Rate (Pulse Repetition Rate) ubhekisela enanini lama-laser pulses akhishwa ngeyunithi ngayinye ngesikhathi, ngokuvamile ku-Hertz (Hz). Ama-high frequency pulses afanele ukusetshenziswa kwe-high repetition rate, kuyilapho ama-low frequency pulses efanelekile emisebenzini ye-single pulse enamandla aphezulu.
2. Ubudlelwano phakathi kwamandla, ububanzi be-pulse kanye nemvamisa Ngaphambi kokulawulwa kwemvamisa ye-laser, ubudlelwano phakathi kwamandla, ububanzi be-pulse kanye nemvamisa kumele kuqale kuchazwe. Kukhona ukusebenzisana okuyinkimbinkimbi phakathi kwamandla e-laser, imvamisa kanye nobubanzi be-pulse, futhi ukulungisa enye yamapharamitha ngokuvamile kudinga ukucabangela amanye amapharamitha amabili ukuze kuthuthukiswe umphumela wohlelo lokusebenza.
3. Izindlela zokulawula imvamisa yokushaya kwenhliziyo ezivamile
a. Imodi yokulawula yangaphandle ilayisha isignali yemvamisa ngaphandle kokunikezwa kwamandla, futhi ilungisa imvamisa ye-laser pulse ngokulawula imvamisa kanye nomjikelezo womsebenzi wesignali yokulayisha. Lokhu kuvumela i-output pulse ukuthi ivumelaniswe nesignali yomthwalo, okwenza ifaneleke ezinhlelweni zokusebenza ezidinga ukulawulwa okunembile.
b. Imodi yokulawula kwangaphakathi Isignali yokulawula imvamisa yakhelwe ngaphakathi kokunikezwa kwamandla okushayela, ngaphandle kokufakwa okwengeziwe kwesignali yangaphandle. Abasebenzisi bangakhetha phakathi kwemvamisa eyakhelwe ngaphakathi engaguquki noma imvamisa yokulawula yangaphakathi elungisekayo ukuze kube nokuguquguquka okukhulu.
c. Ukulungisa ubude be-resonator nomai-modulator ye-electro-opticalIzici zemvamisa ye-laser zingashintshwa ngokulungisa ubude be-resonator noma ngokusebenzisa i-electro-optical modulator. Le ndlela yokulawula imvamisa ephezulu ivame ukusetshenziswa ezinhlelweni ezidinga amandla aphezulu ajwayelekile kanye nobubanzi obufushane be-pulse, njenge-laser micromachining kanye ne-medical imaging.
d. I-Acousto optic Modulator(i-AOM Modulator) iyithuluzi elibalulekile lokulawula imvamisa ye-pulse yobuchwepheshe bokulawula i-laser pulse.I-AOM Modulatorisebenzisa umphumela we-acousto optic (okungukuthi, ingcindezi yokunyakaza kwe-mechanical yamagagasi omsindo ishintsha inkomba yokukhanya) ukuze iguqule futhi ilawule umsebe we-laser.
4. Ubuchwepheshe bokushintshashintsha kwe-Intracavity, uma buqhathaniswa nokushintshashintsha kwangaphandle, ukushintshashintsha kwe-intracavity kungakhiqiza amandla aphezulu, amandla aphezulu kakhului-laser ye-pulseOkulandelayo amasu amane avamile okuguqula i-intracavity:
a. Ukushintsha kwe-Gain ngokushintsha ngokushesha umthombo wephampu, ukuguqulwa kwenombolo yezinhlayiya eziphakathi nendawo kanye ne-gain coefficient kusungulwa ngokushesha, kudlule izinga lokukhanya elikhuthaziwe, okuholela ekukhuleni okukhulu kwama-photon emgodini kanye nokukhiqizwa kwe-laser ye-pulse emfushane. Le ndlela ivame kakhulu kuma-laser e-semiconductor, angakhiqiza ama-pulse kusukela kuma-nanosecond kuya kuma-picosecond ayishumi, ngesilinganiso sokuphindaphinda sama-gigahertz amaningana, futhi isetshenziswa kabanzi emkhakheni wokuxhumana kwe-optical ngamazinga aphezulu okudlulisa idatha.
I-Q switch (i-Q-switching) Ama-Q switch acindezela impendulo yokukhanya ngokuletha ukulahlekelwa okuphezulu emgodini we-laser, okuvumela inqubo yokupompa ukuthi ikhiqize ukuguquka kwenani lezinhlayiya kude kakhulu kunomkhawulo, igcine inani elikhulu lamandla. Ngemva kwalokho, ukulahlekelwa emgodini kuncipha ngokushesha (okungukuthi, inani le-Q lemgodi liyakhuphuka), futhi impendulo yokukhanya iyavulwa futhi, ukuze amandla agciniwe akhishwe ngesimo sama-pulse aphezulu afushane kakhulu.
c. I-Mode Locking ikhiqiza ama-pulse amafushane kakhulu e-picosecond noma ngisho ne-femtosecond ngokulawula ubudlelwano besigaba phakathi kwezindlela ezahlukene ze-longitudinal emgodini we-laser. Ubuchwepheshe be-mode-locking buhlukaniswe phakathi kwe-passive mode-locking kanye ne-active mode-locking.
d. Ukulahla Isikhala Ngokugcina amandla kuma-photon ku-resonator, kusetshenziswa isibuko sesikhala esiphansi ukubopha ama-photon ngempumelelo, kugcinwa isimo sokulahlekelwa okuphansi emgodini isikhathi esithile. Ngemva komjikelezo owodwa wokujikeleza, i-pulse enamandla "iyalahlwa" ngaphandle kwesikhala ngokushintsha ngokushesha isici sesikhala sangaphakathi, njenge-modulator ye-acousto-optic noma i-electro-optic shutter, bese kukhishwa i-laser ye-pulse emfushane. Uma kuqhathaniswa nokushintsha kwe-Q, ukukhipha isikhala kungagcina ububanzi be-pulse yama-nanosecond amaningana ngamanani aphezulu okuphindaphinda (njenge-megahertz eminingana) futhi kuvumele amandla aphezulu okushaya, ikakhulukazi ezinhlelweni zokusebenza ezidinga amazinga aphezulu okuphindaphinda kanye nama-pulse amafushane. Kuhlanganiswe nezinye izindlela zokukhiqiza i-pulse, amandla okushaya angathuthukiswa kakhulu.
Ukulawulwa kokushaya kwenhliziyoi-laserkuyinqubo eyinkimbinkimbi nebalulekile, ehilela ukulawula ububanzi be-pulse, ukulawula imvamisa ye-pulse kanye namasu amaningi okushintshashintsha. Ngokukhetha okunengqondo nokusebenzisa lezi zindlela, ukusebenza kwe-laser kungalungiswa ngokunembile ukuze kuhlangatshezwane nezidingo zezimo ezahlukene zohlelo lokusebenza. Esikhathini esizayo, ngokuvela okuqhubekayo kwezinto ezintsha kanye nobuchwepheshe obusha, ubuchwepheshe bokulawula i-pulse bama-laser buzoletha impumelelo eyengeziwe, futhi bukhuthaze ukuthuthukiswa kweubuchwepheshe be-laserekuqondeni kokunemba okuphezulu kanye nokusetshenziswa okubanzi.
Isikhathi sokuthunyelwe: Mashi-25-2025