Nkhani zaposachedwa za kafukufuku wa laser communication

Nkhani zaposachedwa za kafukufuku wamlengalenga kulankhulana laser

Dongosolo la intaneti la Satellite, lomwe limafalikira padziko lonse lapansi, kutsika pang'ono komanso bandwidth yayikulu, yakhala njira yayikulu pakukweza ukadaulo wamtsogolo. Kulankhulana kwa laser Space ndiye ukadaulo wofunikira pakukulitsa njira yolumikizirana ya satellite.Semiconductor laserImawonetsa kuthekera kwakukulu kogwiritsa ntchito njira yolumikizirana ya laser mlengalenga chifukwa chakuchita bwino kwambiri, moyo wautali, kukula kochepa, kulemera kwake komanso mawonekedwe abwino kwambiri osinthira. Komabe, kuwala kwa dzuwa la cosmic, kuwala kwa galactic cosmic ndi kuchuluka kwa tinthu tating'ono tambiri tokhala ndi mphamvu zambiri monga ma protoni, ma elekitironi ndi ayoni olemera mu lamba wamtundu wa geomagnetic m'malo amlengalenga angayambitse kuwonongeka kwa magwiridwe antchito a chipangizocho komanso kupangitsa kulephera kwa chipangizocho, zomwe zimawopseza kwambiri kudalirika ndi kukhazikika kwa njira zolumikizirana za laser.

MKULU1. Chipangizo choyesera chalaserkuwunika ntchito

Posachedwapa, gulu lofufuza ku China lapita patsogolo kwambiri pa kafukufuku wa kachitidwe ka ma lasers a quantum dot mu gulu lolumikizirana mlengalenga. Kupyolera mu kamangidwe ka bandi katsopano komanso kukhathamiritsa kwa dera logwira ntchito, gululi linapanga bwino zotsatira za kafukufuku waposachedwa wa ma lasers olankhulana mumlengalenga, omwe amagwira ntchito bwino kwambiri m'malo okhala ndi mphamvu zambiri, ma quantum dot lasers. Iwo adachita kusanthula mozama kofananiza kachitidwe kazinthu zosiyanasiyana m'malo amlengalenga. Zotsatira zoyesera zikuwonetsa kuti mawonekedwe a madontho a quantum amawonetsa zabwino zokhazikika pamapangidwe amphamvu kwambiri amphamvu apansi pa Earth orbit.

Kutengera zomwe zapezekazi, gulu lofufuza lidapanga bwino ndikupanga mtundu watsopano waquantum dot laser. Chipangizochi chimasonyeza ntchito yabwino kwambiri m'madera ovuta kwambiri: pa jekeseni wa 3MeV proton mpaka 7 × 1013 cm-2, laser imakhala ndi mzere wowonjezera mzere pafupi ndi ziro; Phokoso laling'ono lamphamvu (RIN) la chipangizochi ndilotsika kwambiri -163 dB / Hz, ngakhale pa mlingo waukulu wa jekeseni, RIN imawonjezeka ndi 1 dB / Hz yokha. Kuphatikiza apo, laser imatha kugwirabe ntchito mokhazikika pansi pazamphamvu zowunikira -3.1dB. Kupindula kumeneku sikungotsimikizira zotsatira zaposachedwapa za kafukufuku wa lasers mlengalenga, komanso kumapereka odalirikanjira yothetsera kuwalapomanga maukonde olumikizirana ma satellite apamwamba kwambiri.