Nkhani zaposachedwa kwambiri za kafukufuku wa laser yolumikizirana m'mlengalenga

Nkhani zaposachedwa za kafukufuku walaser yolumikizirana mlengalenga

Dongosolo la intaneti ya satellite, lomwe lili ndi kufalikira kwake padziko lonse lapansi, kuchedwa kochepa komanso kuchuluka kwa bandwidth, lakhala njira yofunika kwambiri pakukula kwa ukadaulo wolumikizirana mtsogolo. Kulankhulana ndi laser yamlengalenga ndiye ukadaulo wofunikira kwambiri pakukula kwa dongosolo lolumikizirana la satellite.Laser ya semiconductorikuwonetsa kuthekera kwakukulu kogwiritsa ntchito makina olumikizirana ndi laser yamlengalenga chifukwa cha kugwira ntchito kwake bwino, moyo wautali, kukula kwake kochepa, kulemera kwake kopepuka komanso mawonekedwe ake abwino kwambiri. Komabe, kuwala kwa dzuwa, kuwala kwa galactic cosmic ndi tinthu tambirimbiri tokhala ndi mphamvu zambiri monga ma proton, ma elekitironi ndi ma ayoni olemera mu lamba lojambulira geomagnetic mumlengalenga zitha kuwononga magwiridwe antchito a chipangizocho komanso kupangitsa kuti chipangizocho chilephereke, zomwe zimawopseza kwambiri kudalirika ndi kukhazikika kwa makina olumikizirana ndi laser yamlengalenga.

CHITHUNZI 1. Chipangizo choyesera chalaserkuwunika momwe zinthu zikuyendera

Posachedwapa, gulu lofufuza ku China lapita patsogolo kwambiri pa kafukufuku wa magwiridwe antchito a ma laser a quantum dot mu gulu lolumikizirana la mlengalenga. Kudzera mu kapangidwe katsopano ka gululo komanso kukonza bwino kapangidwe ka dera, gululo lapanga bwino zotsatira za kafukufuku waposachedwa wa ma laser olumikizirana a mlengalenga, omwe ali ndi magwiridwe antchito abwino kwambiri mu malo okhala ndi tinthu tambirimbiri tokhala ndi mphamvu zambiri, ma laser a quantum dot. Adachita kusanthula kozama koyerekeza magwiridwe antchito a machitidwe osiyanasiyana azinthu mu malo okhala ndi mlengalenga. Zotsatira za kuyesa zikuwonetsa kuti kapangidwe ka quantum dot kakuwonetsa ubwino wodabwitsa wokhazikika mu malo okhala ndi tinthu tambirimbiri tokhala ndi mphamvu zambiri mu malo otsika a Earth orbit.

Kutengera ndi zomwe zapezekazi, gulu lofufuza linapanga bwino ndikupanga mtundu watsopano walaser ya dothi la quantumChipangizochi chikuwonetsa magwiridwe antchito abwino kwambiri m'malo ovuta kwambiri: pa jakisoni wa proton wa 3MeV mpaka 7×1013 cm-2, laser imasunga mzere wowonjezera mphamvu pafupifupi zero; Phokoso lapakati la mphamvu (RIN) la chipangizocho ndi lotsika ngati -163 dB/Hz, ngakhale pa voliyumu yayikulu kwambiri ya jakisoni, RIN imawonjezeka ndi 1 dB/Hz yokha. Kuphatikiza apo, laser ikhoza kugwirabe ntchito mokhazikika pansi pa -3.1dB yowunikira mwamphamvu. Kupambana kumeneku sikungotsimikizira zotsatira zaposachedwa za kafukufuku wa ma laser olumikizirana m'mlengalenga, komanso kumapereka chitsimikizo chodalirika.yankho la gwero la kuwalapomanga maukonde olumikizirana ndi ma satellite ogwira ntchito bwino kwambiri.