Iterambere riherutse mu gupima ibyuma bipima inkombe by’imiraba y’imiraba

Iterambere riherutse muimashini zipima inkombe z'amazi zigaragaza ubukana bwinshi

Ubushyuhe bwinshi bwo mu cyumba 1550 nmicyuma gipima inkombe z'amazi

Mu gice cya hafi ya infrared (SWIR), diode z'inkangu zikoresha umuvuduko mwinshi zikoreshwa cyane mu itumanaho rya optoelectronic na liDAR. Ariko, photodiode y'inkangu ikoresha infrared (APD) igenzurwa na Indium gallium arsenic avalanche breakdown diode (InGaAs APD) yahoraga igabanywa n'urusaku rw'ingufu zikomoka ku bikoresho gakondo byo mu gace, indium phosfide (InP) na indium aluminum arsenic (InAlAs), bigatuma ubushobozi bw'igikoresho bugabanuka cyane. Mu myaka yashize, abashakashatsi benshi barimo gushaka ibikoresho bishya bya semiconductor bihuye na InGaAs na InP optoelectronic platform processes kandi bifite imikorere y'urusaku rw'ingufu nke cyane nk'ibikoresho bya silikoni.

Igikoresho gishya cyo gupima amatara cya 1550 nm gifasha mu iterambere rya sisitemu za LiDAR

Itsinda ry'abashakashatsi bo mu Bwongereza na Leta Zunze Ubumwe za Amerika ku nshuro ya mbere ryashoboye gukora imashini nshya ipima imiterere y'amajwi ya APD ifite ubushobozi bwo kuyungurura 1550 nm (icyuma gipima imiterere y'inkangu), iterambere ryizeza kunoza cyane imikorere ya sisitemu za LiDAR n'izindi porogaramu za optoelectronic.

Ibikoresho bishya bitanga inyungu z'ingenzi

Ikintu cy’ingenzi muri ubu bushakashatsi ni uburyo bushya bwo gukoresha ibikoresho. Abashakashatsi bahisemo GaAsSb nk'urwego rwo kwinjizamo ibintu na AlGaAsSb nk'urwego rwo kongeramo ibintu. Iyi miterere itandukanye na InGaAs/InP gakondo kandi izana ibyiza bikomeye:

1.GaAsSb absorbing layer: GaAsSb ifite coefficient yo kwinjiza lisa na InGaAs, kandi kuva kuri GaAsSb absorbing layer ukajya kuri AlGaAsSb (icyiciro cyo gukuba) biroroshye, bigabanya ingaruka zo gutega no kunoza umuvuduko n'ubushobozi bwo kwinjiza igikoresho.

2. Urusobe rw'umuvuduko wa AlGaAsSb: Urusobe rw'umuvuduko wa AlGaAsSb ruruta urw'umuvuduko wa InP na InAlAs gakondo mu mikorere. Rugaragarira cyane cyane mu kwiyongera cyane mu bushyuhe bw'icyumba, umuvuduko mwinshi w'amajwi n'urusaku rwinshi cyane.

Hamwe n'ibipimo by'imikorere myiza cyane

IgishyaAPD ipima foto(avalanche photodiode detector) inatanga iterambere rikomeye mu bipimo by'imikorere:

1. Inyungu nyinshi cyane: Inyungu nyinshi cyane ya 278 yabonetse ku bushyuhe bw'icyumba, kandi vuba aha Dr. Jin Xiao yanoje uburyo bwo kunoza imiterere n'imikorere, kandi inyungu ntarengwa yongerewe igera kuri M=1212.

2. Urusaku ruri hasi cyane: rugaragaza urusaku ruri hasi cyane (F < 3, yunguka M = 70; F < 4, yunguka M = 100).

3. Ubushobozi bwo hejuru bwa quantum: munsi y’inyungu ntarengwa, ubushobozi bwo hejuru bwa quantum bugera kuri 5935.3%. Ubushyuhe buhamye: ubushobozi bwo kugabanuka kw'ingufu ku bushyuhe buri hasi ni hafi 11.83 mV/K.

Igishushanyo cya 1 Urusaku rwinshi rwa APDibikoresho bipima fotougereranije n'indi APD photodetector

Amahirwe menshi yo gukoresha

Iyi APD nshya ifite ingaruka zikomeye kuri sisitemu za liDAR na porogaramu za fotoni:

1. Iterambere ry’igipimo cy’urusaku hagati y’urusaku n’urusaku: Iterambere ry’urusaku rwinshi n’imiterere y’urusaku ruto birushaho kunoza cyane igipimo cy’igipimo cy’urusaku hagati y’urusaku n’urusaku, ibi bikaba ari ingenzi cyane mu bikorwa biri mu duce tudakoresha fotoni, nko kugenzura imyuka ihumanya ikirere.

2. Guhuza neza: Imashini nshya ipima urumuri ya APD (ipima urumuri rw'inkangu) yagenewe guhuza na porogaramu za optoelectronics za indium phosphide (InP), igamije guhuza neza na sisitemu z'itumanaho zisanzweho.

3. Ikora neza cyane: Ishobora gukora neza ku bushyuhe bw'icyumba nta buryo bugoye bwo gukonjesha, byoroshya ikoreshwa mu bikorwa bitandukanye bifatika.

Iterambere ry'iyi fotodetector nshya ya SACM APD ya 1550 nm (avalanche photodetector) ni intambwe ikomeye muri uru rwego, Ikemura ibibazo by'ingenzi bifitanye isano n'urusaku rwinshi n'ibicuruzwa byoroshye mu miterere gakondo ya APD photodetector (avalanche photodetector). Iri shyashya ryitezweho kongera ubushobozi bwa sisitemu za liDAR, cyane cyane muri sisitemu za liDAR zidafite abapilote, ndetse no mu itumanaho ryigenga.