Izindaba zakamuva zocwaningo lwe-laser yokuxhumana emkhathini

Izindaba zakamuva zocwaningo lweindawo yokuxhumana laser

Isistimu ye-inthanethi yesathelayithi, ehlanganisa umhlaba wonke, ukubambezeleka okuphansi kanye nomkhawulokudonsa ophezulu, isiphenduke inkomba ebalulekile yokuthuthukiswa kobuchwepheshe bezokuxhumana esikhathini esizayo. Ukuxhumana nge-laser yasemkhathini kuwubuchwepheshe obuyisisekelo ekuthuthukisweni kohlelo lokuxhumana ngesathelayithi.I-laser ye-semiconductorikhombisa amandla amakhulu okusebenza ohlelweni lokuxhumana nge-laser yasemkhathini ngenxa yokusebenza kahle kwayo okuphezulu, impilo ende, usayizi omncane, isisindo esilula kanye nezici ezinhle kakhulu zokuguquguquka. Nokho, imisebe ye-solar cosmic, imisebe ye-galactic cosmic kanye nenani elikhulu lezinhlayiya ezishajwa ngamandla amakhulu njengama-proton, ama-electron nama-ion asindayo ebhande lokuthwebula i-geomagnetic endaweni ezungezile kungase kuholele ekulimazeni ukusebenza kwedivayisi futhi kuholele nasekuhlulekeni kwedivayisi, okusongela kakhulu ukwethembeka nokuzinza kwezinhlelo zokuxhumana ze-laser yasemkhathini.

I-FIG1. Idivayisi yokuhlola yelaserukuhlolwa kokusebenza

Muva nje, ithimba labacwaningi e-China lenze inqubekelaphambili ebalulekile ocwaningweni lokusebenza kwama-laser amachashazi e-quantum kubhendi yokuxhumana yendawo. Ngokuklama kwebhendi emisha kanye nokwenza kahle kwesakhiwo sesifunda esisebenzayo, ithimba lithuthukise ngempumelelo imiphumela yakamuva yocwaningo lwamalaser okuxhumana emkhathini, asebenza kahle kakhulu endaweni enezinhlayiya ezinamandla, ama-quantum dot lasers. Benza ukuhlaziya okuqhathanisayo okujulile kokusebenza kwezinhlelo zezinto ezibonakalayo ezahlukahlukene endaweni yendawo. Imiphumela yokuhlola ibonisa ukuthi ukwakheka kwechashazi le-quantum kukhombisa izinzuzo ezimangalisayo zokuzinza endaweni yezinhlayiya zamandla aphezulu yokuzungeza komhlaba okuphansi.

Ngokusekelwe kulokhu kutholwa, ithimba locwaningo liklame ngempumelelo futhi lakha uhlobo olusha lwei-quantum dot laser. Idivayisi ibonisa ukusebenza okuhle kakhulu ezindaweni ezidlulele: kumjovo we-proton we-3MeV kuze kufike ku-7 × 1013 cm-2, i-laser igcina isici sokuthuthukisa umugqa oseduze no-zero; Umsindo wokuqina omaphakathi (RIN) wedivayisi uphansi njengo -163 dB/Hz, ngisho nevolumu yomjovo omkhulu, i-RIN inyuka ngo-1 dB/Hz kuphela. Ngaphezu kwalokho, i-laser isengasebenza ngokuzinzile ngaphansi kwesimo sempendulo yokukhanya eqinile engu -3.1dB. Le mpumelelo ayiqinisekisi kuphela imiphumela yakamuva yocwaningo lwamalaser okuxhumana emkhathini, kodwa futhi inikeza okuthembekileisisombululo somthombo wokukhanyaukuze kwakhiwe amanethiwekhi okuxhumana ngesathelayithi asebenza kahle kakhulu.