Nhau dzekutsvaga dzichangoburwa dze laser yekutaurirana kwemuchadenga

Nhau dzetsvagurudzo dzichangoburwa dzelaser yekutaurirana muchadenga

Sisitimu yeInternet yesatellite, ine kufukidza kwayo pasi rose, kunonoka kwakaderera uye bandwidth yakakwira, yave nzira huru yekuvandudza tekinoroji yekutaurirana mune ramangwana. Kutaurirana nelaser yemuchadenga ndiyo tekinoroji huru mukugadzirwa kwesisitimu yekutaurirana yesatellite.Laser ye semiconductorinoratidza mukana wakakura wekushandisa mu space laser communication system nekuda kwekushanda kwayo kwakanyanya, kurarama kwenguva refu, saizi diki, huremu hwakareruka uye hunhu hwakanaka hwe modulation. Zvisinei, solar cosmic rays, galactic cosmic rays uye huwandu hwakawanda hwe high-energy charged particles dzakadai se protons, ma electron uye heavy ions mu geomagnetic capture belt munzvimbo ye space zvinogona kukonzera kudzikira kwekushanda kwe tool uye kutokonzera kutadza kwe tool, izvo zvinokanganisa zvakanyanya kuvimbika uye kugadzikana kwe space laser communication systems.

Mufananidzo 1. Mudziyo wekuyedza welaserongororo yekushanda

Munguva pfupi yapfuura, timu yekutsvagisa muChina yakaita kufambira mberi kwakakosha mukutsvagisa mashandiro e quantum dot lasers mu communication band yenzvimbo. Kuburikidza nekugadzira bhendi itsva uye kugadzirisa active region structure, timu iyi yakabudirira kugadzira mhedzisiro yekutsvagisa yazvino ye space communication lasers, iyo ine mashandiro akanaka munzvimbo ine simba guru, quantum dot lasers. Vakaita ongororo yakadzama yekuenzanisa mashandiro ehurongwa hwakasiyana hwezvinhu munzvimbo ine space. Mhedzisiro yekuyedza inoratidza kuti quantum dot structure inoratidza mabhenefiti anoshamisa ekugadzikana kwechimiro munzvimbo ine simba guru ye low Earth orbit.

Zvichibva pane zvakawanikwa izvi, timu yekutsvagisa yakabudirira kugadzira nekugadzira mhando itsva yelaser ye quantum dot. Mudziyo uyu unoratidza kushanda zvakanaka munzvimbo dzakaoma: pa3MeV proton injection kusvika 7×1013 cm-2, laser inochengetedza linewidth enhancement factor iri pedyo ne zero; Average relative intensity noise (RIN) yemudziyo yakaderera se -163 dB/Hz, kunyangwe pahuwandu hwakanyanya hwe injection, RIN inowedzera ne 1 dB/Hz chete. Pamusoro pezvo, laser inogona kushanda zvakadzikama pasi pemamiriro echiedza chakasimba che -3.1dB. Kubudirira uku hakungosimbisi chete mhedzisiro yekutsvagisa yazvino yema space communication lasers, asiwo kunopa yakavimbikamhinduro yechiedzayekuvaka network dzekukurukurirana nesatellite dzinoshanda zvakanaka.