Ucwaningo Olusha kui-laser enobubanzi obuncane
I-laser-linewidth laser ibalulekile ezinhlobonhlobo zezinhlelo zokusebenza ezifana nokuzwa ukunemba, i-spectroscopy, nesayensi ye-quantum. Ngaphandle kobubanzi be-spectral, ukuma kwe-spectral nakho kuyisici esibalulekile, esincike esimweni sohlelo lokusebenza. Isibonelo, amandla ezinhlangothini zombili zomugqa we-laser angase ethule amaphutha ekukhohlisweni kokubonwa kwama-qubits futhi athinte ukunemba kwamawashi e-athomu. Ngokomsindo wefrikhwensi ye-laser, izingxenye ze-Fourier ezikhiqizwa imisebe ezenzakalelayo engena ku-laserImodi ngokuvamile iphakeme kuno-105 Hz, futhi lezi zingxenye zinquma ama-amplitudes nhlangothi zombili zomugqa. Ukuhlanganisa isici sokuthuthukisa u-Henry nezinye izici, umkhawulo we-quantum, okungukuthi umkhawulo we-Schawlow-Townes (ST), uyachazwa. Ngemva kokuqeda imisindo yobuchwepheshe efana nokudlidliza komgodi kanye nobude be-drift, lo mkhawulo unquma umkhawulo ophansi wobubanzi bomugqa obuphumelelayo obufinyelelekayo. Ngakho-ke, ukunciphisa umsindo we-quantum kuyisinyathelo esibalulekile ekwakhiweni kweama-lasers anobubanzi bomugqa omncane.
Muva nje, abacwaningi baye benza ubuchwepheshe obusha obunganciphisa ububanzi bemishayo ye-laser izikhathi ezingaphezu kwezinkulungwane eziyishumi. Lolu cwaningo lungase luguqule ngokuphelele izinkambu ze-quantum computing, amawashi e-athomu kanye nokutholwa kwamagagasi adonsela phansi. Ithimba locwaningo lisebenzise umgomo wokuhlakazeka kwe-Raman ukuze unike amandla amalaser ukuthi ajabulele ukudlidliza kwefrikhwensi ephezulu ngaphakathi kokokusebenza. Umthelela wokunciphisa ububanzi bomugqa uphakeme ngokuphindwe ngezinkulungwane kunowezindlela zendabuko. Empeleni, kulingana nokuhlongoza ubuchwepheshe obusha be-laser spectral purification obungasetshenziswa ezinhlotsheni ezahlukene zamalaser okokufaka. Lokhu kumelela impumelelo ebalulekile emkhakheni weubuchwepheshe be-laser.
Lobu buchwepheshe obusha buyixazulule inkinga yezinguquko zesikhathi samagagasi okukhanya okungahleliwe amaminithi ambalwa abangela ukuhlanzeka nokunemba kwemishayo ye-laser kwehle. Ku-laser ekahle, wonke amaza okukhanya kufanele avunyelaniswe ngokuphelele - kodwa empeleni, amanye amaza okukhanya angaphambili kancane noma ngemuva kwamanye, abangele ukushintshashintsha kwesigaba sokukhanya. Lokhu kuguquguquka kwesigaba kudala “umsindo” ku-laser spectrum – kufiphalisa imvamisa ye-laser futhi kunciphise ukuhlanzeka kombala wayo. Umgomo wobuchwepheshe be-Raman ukuthi ngokuguqula lokhu kungahambi kahle kwesikhashana kube ukudlidliza ngaphakathi kwekristalu yedayimane, lokhu kudlidliza kumuncwa ngokushesha futhi kushabalale (phakathi kwamathriliyoni ambalwa wesekhondi). Lokhu kwenza amaza okukhanya asele abe nama-oscillation ashelelayo, ngaleyo ndlela afinyelele ubumsulwa obuphakeme be-spectral futhi akhiqize umphumela obalulekile wokunciphai-laser spectrum.
Isikhathi sokuthumela: Aug-04-2025