Umgomo oyisisekelo wei-fiber lasers yemodi eyodwa
Ukukhiqizwa kwe-laser kudinga ukuhlangabezana nezimo ezintathu eziyisisekelo: ukuguqulwa kwabantu, i-resonant cavity efanele, kanye nokufinyelelalaseri-threshold (inzuzo yokukhanya emgodini we-resonant kumele ibe mkhulu kunokulahlekelwa). Indlela yokusebenza yama-laser e-fiber yemodi eyodwa isekelwe ngokunembile kulezi zimiso zomzimba ezibalulekile futhi ifinyelela ukuthuthukiswa kokusebenza ngesakhiwo esikhethekile se-fiber waveguides.
Imisebe evuselelwe kanye nokuguqulwa kwabantu kuyisisekelo esibonakalayo sokukhiqizwa kwama-lasers. Uma amandla okukhanya akhishwa umthombo wephampu (ngokuvamile i-semiconductor laser diode) ejova ku-fayibha yenzuzo ehlanganiswe nama-ion omhlaba angavamile (afana ne-Ytterbium Yb³⁺, erbium Er³⁺), ama-ion omhlaba angavamile amunca amandla kanye noshintsho kusuka endaweni ephansi kuya esimweni senjabulo. Uma inani lama-ion esimeni esijabulile lidlula lelo elisendaweni ephansi, kwakheka isimo sokuguqula inani labantu. Kuleli qophelo, i-photon yesigameko izocupha imisebe evuselelwe ye-ion yesimo esijabulile, ikhiqize ama-photon amasha wefrikhwensi efanayo, isigaba kanye nesiqondiso njenge-photon yesigameko, ngaleyo ndlela kuzuzwe ukukhuliswa kokubona.
Isici esiyinhloko semodi eyodwai-fiber lasersilele kububanzi bayo obuyingqikithi obuhle kakhulu (imvamisa i-8-14μm). Ngokombono we-wave optics, umgogodla onjalo ungavumela kuphela imodi yensimu kazibuthe eyodwa (okungukuthi, imodi eyisisekelo LP₀₁ noma imodi ye-HE₁₁) ukuthi idluliselwe ngokuzinzile, okungukuthi, imodi eyodwa. Lokhu kuqeda inkinga yokuhlakazeka kwe-intermodal ekhona kuma-multimode fibers, okungukuthi, into yokwandisa i-pulse ebangelwa ukusabalala kwezindlela ezahlukene ngesivinini esihlukile. Ngokombono wezici zokudlulisela, umehluko wendlela yokukhanya okusabalalisa ngakundlela ye-axial kumafiber optical wemodi eyodwa mncane kakhulu, okwenza i-beam ephumayo ibe nokuhlangana okuphelele kwendawo kanye nokusatshalaliswa kwamandla kwe-Gaussian, kanye nesici sekhwalithi ye-M² singasondela ku-1 (M²=1 ukuze uthole induku ekahle ye-Gaussian).
Ama-fiber lasers angabameleli abavelele besizukulwane sesithathuubuchwepheshe be-laser, ezisebenzisa imicu yengilazi enesici esingavamile somhlaba njengendlela yokuzuza. Kule minyaka eyishumi edlule, ama-laser emodi eyodwa abe nesabelo esibaluleke kakhulu emakethe ye-laser yomhlaba, ngenxa yezinzuzo zabo ezihlukile zokusebenza. Uma kuqhathaniswa namalaser efiber eningi noma i-laser yesimo esiqinile yendabuko, amalaser efibre yemodi eyodwa angakhiqiza i-Gaussian beam ekahle enekhwalithi yebeam esondele koku-1, okusho ukuthi uthango lungacishe lufinyelele i-Angle ecatshangelwayo yokuhluka kanye nendawo okugxilwe kuyo okungenani. Lesi sici sisenza singabuyiseleki ezindimeni zokucubungula nokulinganisa ezidinga ukunemba okuphezulu nomthelela ophansi wokushisa.
Isikhathi sokuthumela: Nov-19-2025