Iindaba zamva nje zophando lwelaser yonxibelelwano lwasemajukujukwini

Iindaba zophando zamva nje zei-laser yonxibelelwano yendawo

Inkqubo ye-Intanethi yesathelayithi, kunye nehlabathi jikelele, i-latency ephantsi kunye ne-bandwidth ephezulu, iye yaba ngumkhombandlela ophambili wophuhliso lweteknoloji yonxibelelwano lwexesha elizayo. Unxibelelwano ngelaser yendawo yeyona teknoloji ingundoqo kuphuhliso lwenkqubo yonxibelelwano ngesathelayithi.I-laser ye-semiconductoribonisa usetyenziso olubanzi olunokwenzeka kwinkqubo yonxibelelwano lwelaser yendawo ngenxa yokusebenza kwayo okuphezulu, ubomi obude, ubungakanani obuncinci, ubunzima obulula kunye neempawu ezibalaseleyo zokumodareyitha. Nangona kunjalo, imitha yelanga ye-cosmic, i-galactic cosmic ray kunye nenani elikhulu lamasuntswana anamandla aphezulu afana neeproton, ii-electron kunye nee-ion ezinzima kwibhanti yokubamba i-geomagnetic kwindawo esingqongileyo kunokukhokelela ekuthotyweni kokusebenza kwesixhobo kwaye kude kukhokhelele ekusileleni kwesixhobo, nto leyo ebeka esichengeni ngokunzulu ukuthembeka kunye nokuzinza kweenkqubo zonxibelelwano ngelaser yendawo.

I-FIG1. Isixhobo sovavanyo selaseruvandlakanyo lokusebenza

Kutshanje, iqela lophando e-China lenze inkqubela phambili ebalulekileyo kuphando lwentsebenzo ye-quantum dot lasers kwibhendi yonxibelelwano yendawo. Ngoyilo lwebhendi entsha kunye nokulungiswa kwesakhiwo sommandla osebenzayo, iqela liphuhlise ngempumelelo iziphumo zophando zamva nje ze-laser zonxibelelwano lwendawo, ezinomsebenzi ogqwesileyo kwimeko yesuntswana lamandla aphezulu, i-quantum dot lasers. Baqhube uhlalutyo olunzulu lokuthelekisa ukusebenza kweenkqubo zezinto eziphathekayo ezahlukeneyo kwindawo esingqongileyo. Iziphumo zovavanyo zibonisa ukuba ubume bechaphaza le-quantum bubonisa iingenelo ezimangalisayo zozinzo kwimo yesuntswana lamandla aphezulu kumjikelezo woMhlaba ophantsi.

Ngokusekwe kolu kufunyaniswe, iqela lophando lenze ngempumelelo kwaye lenze uhlobo olutsha lwei-quantum dot laser. Isixhobo sibonisa ukusebenza okugqwesileyo kwiindawo ezigqithisileyo: kwi-3MeV i-proton injection ukuya kwi-7 × 1013 cm-2, i-laser igcina i-linewidth factor enhanced factor close to zero; Isandi esilinganiselweyo somsindo (RIN) wesixhobo siphantsi -163 dB / Hz, nangona umthamo omkhulu we-injection, i-RIN inyuka nge-1 dB / Hz kuphela. Ukongeza, i-laser isenokusebenza ngokuzinzileyo phantsi kwemeko yempendulo yokukhanya eyomeleleyo ye -3.1dB. Le mpumelelo ayiqinisekisi kuphela iziphumo zophando zamva nje zeelaser zonxibelelwano lwendawo, kodwa ikwabonelela ngokuthembekileyoisisombululo somthombo wokukhanyakulwakhiwo lonxibelelwano lwesathelayithi olusebenza kakhulu.