Iterambere ryagezweho muri sensibilité yo hejuru ya avalanche Photodetector

Iterambere rya vuba muriibyiyumvo byinshi bya avalanche Photodetector

Ubushyuhe bwicyumba cyunvikana 1550 nmicyuma gifata amashanyarazi

Muri bande ya infragre (SWIR), sensibilité yihuta yihuta ya avalanche ikoreshwa cyane mugutumanaho kwa optoelectronic hamwe na liDAR. Nyamara, fotodiode ya avalanche hafi ya infragre (APD) yiganjemo Indium gallium arsenic avalanche breakdown diode (InGaAs APD) yamye igarukwaho n urusaku rudasanzwe rwo kugongana ionisiyoneri yibikoresho gakondo byo mukarere, fosifide (InP) hamwe na aluminium arsenic (InAlAs), bigatuma sensibilité igabanuka cyane. Mu myaka yashize, abashakashatsi benshi barimo gushakisha byimazeyo ibikoresho bishya bya semiconductor bihujwe na InGaAs hamwe na InP optoelectronic platform kandi bifite ingaruka zidasanzwe-ionisiyoneri urusaku rusa nkibikoresho byinshi bya silicon.

Agashya 1550 nm avalanche Photodiode detector ifasha iterambere rya sisitemu ya LiDAR

Itsinda ry’abashakashatsi mu Bwongereza no muri Amerika bakoze ku nshuro yabo ya mbere batsinze ibyiyumvo bishya bya ultra-high sensibilité 1550 nm APD ifotora (APD) (ifoto ya avalanche), intambwe isezeranya kuzamura cyane imikorere ya sisitemu ya LiDAR nibindi bikorwa bya optoelectronic.

Ibikoresho bishya bitanga inyungu zingenzi

Ikintu cyaranze ubu bushakashatsi ni ugukoresha udushya ibikoresho. Abashakashatsi bahisemo GaAsSb nk'urwego rwo kwinjiza na AlGaAsSb nk'urwego rwo kugwiza. Igishushanyo gitandukanye na InGaAs / InP gakondo kandi kizana ibyiza byingenzi:

1.GaAsSb igikoresho cyo kwinjiza: GaAsSb ifite coeffisente yo kwinjiza kimwe na InGaAs, kandi kuva muri GaAsSb kwinjirira muri AlGaAsSb (kugwiza ibice) biroroshye, kugabanya ingaruka zumutego no kunoza umuvuduko no kwinjiza ibikoresho.

2.Igice cyo kugwizaAlGaAsSb: Igice cyo kugwiza AlGaAsSb kiruta InP gakondo na InAlAs kugwiza imikorere. Igaragarira cyane cyane mu kwiyongera kwinshi mubushyuhe bwicyumba, umuvuduko mwinshi hamwe n urusaku rurenze urugero.

Hamwe nibikorwa byiza

GishyaAPD ifotora(deteri ya avalanche Photodiode) nayo itanga iterambere ryibipimo mubikorwa:

E.

2. Urusaku ruto cyane: rwerekana urusaku ruke cyane (F <3, kunguka M = 70; F <4, kunguka M = 100).

3. Kwiyongera kwinshi kwinshi: munsi yinyungu nini, kwant ikora neza igera kuri 5935.3%. Ubushyuhe bukomeye butajegajega: kugabanuka kwubushyuhe buke ni nka 11.83 mV / K.

Igishushanyo 1 Urusaku rwinshi rwa APDibikoresho bifotoraugereranije nandi mafoto ya APD

Ibyifuzo byinshi byo gusaba

Iyi APD nshya ifite akamaro gakomeye kuri sisitemu ya liDAR hamwe na foton ikoreshwa:

1.

2.

3. Gukora neza cyane: Irashobora gukora neza mubushyuhe bwicyumba idafite uburyo bukonje bwo gukonjesha, koroshya gahunda mubikorwa bitandukanye bifatika.

Iterambere ryiyi 1550 nm ya SACM APD ifotora (avalanche Photodetector) yerekana intambwe ikomeye mumurima, Ikemura imbogamizi zingenzi zijyanye nurusaku rwinshi kandi ikunguka ibicuruzwa byumuvuduko mubishushanyo mbonera bya APD bifotora (avalanche Photodetector). Ibi bishya biteganijwe kuzamura ubushobozi bwa sisitemu ya liDAR, cyane cyane muri sisitemu ya liDAR idafite abapilote, ndetse n’itumanaho ryisanzuye.