Ukuphumelela itekhnoloji yokufumanisa umbane (I-Avalanche photodetector) : Isahluko esitsha ekuvezeni iimpawu zokukhanya ezibuthathaka
Kuphando lwezenzululwazi, ukuchongwa ngokuchanekileyo kwemiqondiso yokukhanya ebuthathaka sisitshixo sokuvula iindawo ezininzi zenzululwazi. Kutshanje, impumelelo entsha yophando lwezenzululwazi izise inguqu ephambili ekubhaqweni kweempawu zokukhanya ezibuthathaka. Ii-avalanche photodetectoruchungechunge oluphuhliswe liqela elaziwayo lophando lwezenzululwazi e-China, kunye nokusebenza kwalo okukodwa kunye neenzuzo, liya kuvula isahluko esitsha sokubona umqondiso wokukhanya obuthathaka.
IAvalancheifotodetectoriimveliso zothotho, ngokomgaqo we-avalanche amplification yeAPD, ukukhulisa amaxesha ali-10 ukuya kwi-100 ye-PIN eqhelekileyo ye-photoelectric deep detector, enovakalelo oluphezulu, ingxolo ephantsi, ukusebenza kakuhle kokubona kunye nezinye iingenelo ezibalulekileyo. Ukuvela kolu luhlu lweemveliso kuya kunceda abaphandi babone ngcono kwaye bahlalutye iimpawu zokukhanya ezibuthathaka, kwaye bakhuthaze ngakumbi ubunzulu bophando lwezenzululwazi.
Iimpawu eziphambili zolu luhlu lweemveliso ingxolo ephantsi, inzuzo ephezulu kunye nefiber optical, ukhetho lokudibanisa indawo. Oku kuthetha ukuba ingaba indawo yebhubhoratri okanye indawo enzima yangaphandle, imveliso inokufezekisa ukufumanisa okuchanekileyo kwe-optical signal, ukubonelela ngenkxaso yedatha ethembekileyo kubaphandi. Ubuchwephesha obutsha abuphuculanga nje ukufumanisa ukusebenza kakuhle kweempawu ze-optical, kodwa kwakhona kunciphisa ingxolo eyenziwa kwinkqubo yokufumanisa kunye nokuphucula ukuchaneka kokufumanisa.
Ngokukodwa, uluhlu lweempendulo ze-spectra lugubungela i-300-1100nm kunye ne-800-1700nm, kunye ne-3dB i-bandwidth ukuya kwi-200MHz, 500MHz, 1GHz kunye ne-10GHz. Ezi nkcukacha zahlukeneyo kunye neeparameters zenza ukuba imveliso ikwazi ukuziqhelanisa neemfuno zophando lwezenzululwazi ezahlukeneyo, kunye noluhlu olubanzi lwezicelo, kubandakanywa ukubhaqwa komqondiso obuthathaka obonakalayo, ukufumanisa umqondiso we-high-speed optical pulse, kunye nonxibelelwano lwe-quantum.
Kuyafaneleka ukukhankanya ukuba imveliso yakhelwe kwi-avalanche photodiode, isekethe yokukhulisa ingxolo ephantsi, i-APD bias boost circuit, kunye ne-wavelength yokufumanisa uthotho lweemveliso ezigubungela i-300nm-1700nm. Olu yilo lwenza ukuba imveliso ifikelele ekubhaqweni kobuntununtunu obuphezulu, kodwa ikwanciphisa ngempumelelo ingxolo, iphucule ukuchaneka kokubhaqwa. Ukongezelela, iimpawu ezikhethiweyo ze-fiber optical kunye nokudibanisa kwendawo kwenza ukuba imveliso iphumelele ukufunyanwa kwesignali echanekileyo kwiindawo ezahlukeneyo ezinzima.
Ngamafutshane, uphuhliso lwale avalancheumtshina weefoto zombaneuchungechunge ngokungathandabuzekiyo luyimpumelelo enkulu kwitekhnoloji yokufumanisa umbane. Ukuvela kwale mveliso kunika ithuba elitsha lokubona umqondiso wokukhanya obuthathaka kwihlabathi jikelele. Silindele ukuba le mveliso idlale indima enkulu kuphando lwezenzululwazi lwexesha elizayo, ikhuthaze inkqubela phambili yesayensi, kwaye isebenze ngcono uphuhliso loluntu.
Ixesha lokuposa: Sep-07-2023