A. Umqondo wama-laser asheshayo
Ama-laser e-Ultrafast avame ukubhekisela kuma-laser avaliwe ngemodi asetshenziselwa ukukhipha ama-pulse amafushane kakhulu, isibonelo, ama-pulse e-femtosecond noma ubude be-picosecond. Igama elinembile kakhulu lingaba yi-ultrashort pulse laser. Ama-laser e-Ultrashort pulse cishe angama-laser avaliwe ngemodi, kodwa umphumela wokushintshana kwe-gain ungakhiqiza nama-pulse amafushane kakhulu.
B. Uhlobo lwe-laser esheshayo
1. Ama-laser e-Ti-sapphire, ngokuvamile akhiywe yimodi yelensi ye-Kerr, angakhiqiza ama-pulse amafushane angaba ngu-5 fs ubude. Amandla awo okukhipha ajwayelekile ngokuvamile angama-milliwatts angamakhulu ambalwa, ngamazinga okuphindaphinda kwama-pulse, ake sithi, angu-80MHz kanye namashumi ama-femtoseconds noma ngaphansi, kanye nobude be-pulse bamashumi ama-femtoseconds noma ngaphansi, okuholela emandleni aphezulu kakhulu. Kodwa ama-laser e-titanium-sapphire adinga ukukhanya okupompa kusuka kwamanye ama-laser aluhlaza, okwenza abe yinkimbinkimbi futhi abizayo.
2. Kunezinhlobo ezahlukene zama-laser ampompiwe nge-diode asekelwe, isibonelo, kumakristalu e-ytterbium-doped (crystal noma glass) noma i-chromium-doped laser, avame ukusebenzisa i-SESAM passive mode-locking. Nakuba ubude be-pulse yama-laser ampompiwe nge-diode bungebude njengobude be-pulse yama-laser e-titanium-sapphire, ama-laser ampompiwe nge-diode angamboza indawo ebanzi yamapharamitha ngokuya ngobude be-pulse, izinga lokuphindaphinda kwe-pulse, kanye namandla ajwayelekile (bheka ngezansi).
3. Ama-laser e-fibre asekelwe kuma-fiber engilazi ahlanganiswe nezinto ezingavamile zomhlaba angase futhi akhiywe ngendlela engashintshi, isibonelo, kusetshenziswa i-nonlinear polarization rotation noma i-SESAM. Alinganiselwe kakhulu kunama-laser amakhulu ngokwesilinganiso samandla, ikakhulukazi amandla aphezulu, kodwa angahlanganiswa kalula nama-amplifiers e-fibre. Isihloko esimayelana nama-laser e-fibre akhiywe ngendlela sinikeza imininingwane eyengeziwe.
(4) ama-laser e-diode akhiywe ngemodi angaba amadivayisi abalulekile noma ama-laser e-diode angaphandle, futhi angaba asebenzayo, angasebenzi noma axubile akhiywe ngemodi. Ngokuvamile, ama-laser e-diode akhiywe ngemodi asebenza ngesilinganiso sokuphindaphinda kwe-pulse esiphezulu (esiyizinkulungwane eziningana zama-megahertz) ngamandla okushaya kwenhliziyo aphakathi.
Ama-oscillator e-laser asheshayo angaba yingxenye yezinhlelo ze-laser ezisheshayo, ezingahlanganisa ne-amplifier ye-ultrafast (njenge-fiber optic amplifier) ukuze kwandiswe amandla aphezulu kanye namandla okukhipha ajwayelekile.
Isikhathi sokuthunyelwe: Juni-20-2023