Itekhnoloji yokufumanisa umbane ngefoto (Isixhobo sokubona ifoto se-Avalanche): Isahluko esitsha ekutyhileni imiqondiso yokukhanya ebuthathaka
Kuphando lwezenzululwazi, ukuchonga ngokuchanekileyo imiqondiso yokukhanya ebuthathaka sisitshixo sokuvula amacandelo amaninzi ezenzululwazi. Kutshanje, impumelelo entsha yophando lwezenzululwazi izise utshintsho olukhulu ekufumaneni imiqondiso yokukhanya ebuthathaka.isixhobo sokubona ifoto se-avalancheuthotho oluphuhliswe liqela lophando lwezenzululwazi elaziwayo eTshayina, olunentsebenzo yalo eyahlukileyo kunye neenzuzo zalo, luza kuvula isahluko esitsha sokubhaqwa kwesignali yokukhanya ebuthathaka.
I-Avalancheisixhobo sokubona iifotoiimveliso zothotho, ngokwemigaqo yokukhulisa ikhephuI-APD, ukukhulisa kuphindwe kalishumi ukuya kwi-100 kunesitshisi esiqhelekileyo se-PIN photoelectric deep detector, esinobuntununtunu obuphezulu, ingxolo ephantsi, ukusebenza kakuhle kokufumanisa kunye nezinye izibonelelo ezibalulekileyo. Ukuvela kolu luhlu lweemveliso kuya kunceda abaphandi ukuba bafumane kwaye bahlalutye ngcono imiqondiso yokukhanya ebuthathaka, kwaye kukhuthaze ngakumbi ubunzulu bophando lwesayensi.
Iimpawu eziphambili zolu luhlu lweemveliso ziingxolo ephantsi, i-high gain kunye ne-optical fiber, iindlela zokudibanisa indawo. Oku kuthetha ukuba nokuba yindawo yelabhoratri okanye yindawo eyinkimbinkimbi yangaphandle, imveliso inokufikelela ekufumaneni uphawu lwe-optical oluchanekileyo, inika inkxaso yedatha ethembekileyo kubaphandi. Le teknoloji intsha ayiphuculi kuphela ukusebenza kakuhle kokufumanisa iimpawu ze-optical, kodwa ikwanciphisa ingxolo eveliswa kwinkqubo yokufumanisa kwaye iphucula ukuchaneka kokufumanisa.
Ngokukodwa, uluhlu lwee-spectra zempendulo lugubungela i-300-1100nm kunye ne-800-1700nm, kunye ne-bandwidths ye-3dB ukuya kuthi ga kwi-200MHz, 500MHz, 1GHz kunye ne-10GHz. Ezi nkcukacha kunye neeparamitha ezahlukeneyo zivumela imveliso ukuba ivumelane neemfuno ezahlukeneyo zophando lwesayensi, kunye noluhlu olubanzi lwezicelo, kubandakanya ukufunyanwa kwesignali ye-optical ebuthathaka, ukufunyanwa kwesignali ye-optical pulse yesantya esiphezulu, kunye nonxibelelwano lwe-quantum.
Kuyafaneleka ukukhankanya ukuba imveliso ine-photodiode eyakhelwe ngaphakathi ye-avalanche, isekethe yokukhulisa ingxolo ephantsi, isekethe yokunyusa i-APD bias, kwaye ubude be-detection boluhlu lonke lweemveliso bugubungela i-300nm-1700nm. Olu yilo lwenza imveliso ikwazi ukufumanisa uvakalelo oluphezulu, kodwa ikwanciphisa ingxolo ngempumelelo, iphucule ukuchaneka kokufumanisa. Ukongeza, iimpawu ezikhethiweyo ze-optical fiber kunye ne-spatial coupling zenza imveliso ikwazi ukufumanisa umqondiso ngokuchanekileyo kwiindawo ezahlukeneyo ezintsonkothileyo.
Ngamafutshane, uphuhliso lwale ngxubakaxaka yekhephuisixhobo sokubona umbaneOlu ngcelele ngokungathandabuzekiyo luyinkqubela phambili enkulu kubuchwepheshe bokufumanisa i-photoelectric. Ukuvela kwale mveliso kubonelela ngethuba elitsha lokufumanisa isignali yokukhanya ebuthathaka kwihlabathi liphela. Silindele ukuba le mveliso idlale indima enkulu kuphando lwesayensi lwexesha elizayo, ikhuthaze inkqubela phambili yesayensi, kwaye incede ngcono uphuhliso loluntu.
Ixesha lokuthumela: Sep-07-2023