laboratorul de microunde si optoelectronica, main ...rf-opto.etti.tuiasi.ro/docs/files/receptoare...
TRANSCRIPT
![Page 1: Laboratorul de Microunde si Optoelectronica, Main ...rf-opto.etti.tuiasi.ro/docs/files/RECEPTOARE OPTICE...la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W,](https://reader033.vdocuments.mx/reader033/viewer/2022041816/5e5b41e7d5a82e660d7e80f5/html5/thumbnails/1.jpg)
RECEPTOARE OPTICE
![Page 2: Laboratorul de Microunde si Optoelectronica, Main ...rf-opto.etti.tuiasi.ro/docs/files/RECEPTOARE OPTICE...la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W,](https://reader033.vdocuments.mx/reader033/viewer/2022041816/5e5b41e7d5a82e660d7e80f5/html5/thumbnails/2.jpg)
FOTODIODE P-I-NFOTODIODE CU AVALANSA
![Page 3: Laboratorul de Microunde si Optoelectronica, Main ...rf-opto.etti.tuiasi.ro/docs/files/RECEPTOARE OPTICE...la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W,](https://reader033.vdocuments.mx/reader033/viewer/2022041816/5e5b41e7d5a82e660d7e80f5/html5/thumbnails/3.jpg)
FOTODIODE P-I-N
![Page 4: Laboratorul de Microunde si Optoelectronica, Main ...rf-opto.etti.tuiasi.ro/docs/files/RECEPTOARE OPTICE...la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W,](https://reader033.vdocuments.mx/reader033/viewer/2022041816/5e5b41e7d5a82e660d7e80f5/html5/thumbnails/4.jpg)
Constructia fotodiodei
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PRINCIPIUL DE FUNCTIONARE
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Caracterisitici Electrice
(1)S dS c
W WR R
A
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Caracterisitici Electrice - 2
0
0
0
0
0
(2)2
2
2
Sij
Si bi
Si
bi
Si
d
d Si bi
ACV V
AV V
AW
W V V
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Caracterisitici Electrice - 3
3
0.35 (3)rdB
tf
2.2 (4)RCt RC
2 2 2 (5)R DRIFT DIFUZIE RCt t t t
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Caracteristici optice
(6)PIRP
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Influenta temperaturii
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Caracteristica spectrala
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Eficienta cuantica
,
,
. . 1240 (7)real
ideal
R RhcQ E RR q
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Caracteristicile I-V
1 (8)B
qVk T
D SATI I e
1 (9)kVkT
TOTAL SAT PI I e I
![Page 14: Laboratorul de Microunde si Optoelectronica, Main ...rf-opto.etti.tuiasi.ro/docs/files/RECEPTOARE OPTICE...la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W,](https://reader033.vdocuments.mx/reader033/viewer/2022041816/5e5b41e7d5a82e660d7e80f5/html5/thumbnails/14.jpg)
Zgomotul in fotodiode
• Zgomot de alice
• Zgomot termic
![Page 15: Laboratorul de Microunde si Optoelectronica, Main ...rf-opto.etti.tuiasi.ro/docs/files/RECEPTOARE OPTICE...la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W,](https://reader033.vdocuments.mx/reader033/viewer/2022041816/5e5b41e7d5a82e660d7e80f5/html5/thumbnails/15.jpg)
• Zgomot de alice
2 (10)sn P D PDI q I I f
Zgomotul in fotodiode
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• Zgomot termic
4(11)B PD
jnSH
k T fI
R
Zgomotul in fotodiode
![Page 17: Laboratorul de Microunde si Optoelectronica, Main ...rf-opto.etti.tuiasi.ro/docs/files/RECEPTOARE OPTICE...la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W,](https://reader033.vdocuments.mx/reader033/viewer/2022041816/5e5b41e7d5a82e660d7e80f5/html5/thumbnails/17.jpg)
• Zgomotul total
2 2 (12)tn sn jnI I I
Zgomotul in fotodiode
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(13)tntN I fINEPR R
Zgomotul in fotodiode
• Puterea echivalenta de zgomot
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Distributia spectrala a zgomotului
2sn P DS f q I I
2sn P D PDI q I I f
2
0n nI t S f df
2sN sn P DPDI A Hz I f q I I
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DATE DE CATALOG
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Polarizarea fotodiodei - PC
3 (14)2dBMax
F j F A
GBPf HzR C C C
1
2
1 (15)OUTF
V RGain V W R RP R
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Polarizarea fotodiodei – PC_2
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Polarizarea fotodiodei - PV
1 (16)2OP
F F
f HzR C
(17)OUT F PV R I
4 (18)BN
F
k TAIRHz
1 (19)
22 F FF j F A
GBPR CR C C C
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Polarizarea fotodiodei – PV_2
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Proiectarea Receptorului Optic
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Proiectarea Receptorului Optic
0 1
1 0
202
21
AVG
P P
P PP
P P P
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Proiectarea Receptorului Optic
1
0
1
0
22
10
e
e
PrP
Pr dB logP
11 23
2 1e
AVG P Pe
rP P
r
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EXEMPLUProiectarea Receptorului Optic
179
AVG
e
P dBmr dB
207 94
AVG
e
P Wr .
12
1
7 94 12 20 1 55 20 31 247 94 1
eP P AVG
e
P P
rP P
r
.W . W W
.
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Sensibilitate si BER
1 0 1 1 0 252
PE PE PE
2
2
1 2622P
XD X exp
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Sensibilitate si BER - 2
0
1 0 27PPr ag
PE D X dX
2
22
11 0 2822
P PS
XPE exp dX
2
2
11 0 3022
P PS
tPE exp dt
29Xt
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Sensibilitate si BER - 3
312
SNRPE erfc
21 3222x
terfc x exp dt
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Sensibilitate si BER - 4
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Sensibilitate si BER - 5
33P PP P
N ,ef N ,ef
P RISNRI I
34N ,efP P
SNR IP
R
1 352 1
N ,ef eAVG@ BER
e
SNR I rS PR r
![Page 34: Laboratorul de Microunde si Optoelectronica, Main ...rf-opto.etti.tuiasi.ro/docs/files/RECEPTOARE OPTICE...la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W,](https://reader033.vdocuments.mx/reader033/viewer/2022041816/5e5b41e7d5a82e660d7e80f5/html5/thumbnails/34.jpg)
Sensibilitate si BER - 6
36THPA
TIA
VIR
37N ,ef PAP P
SNR I IP
R
1 382 1
THN ,ef
eTIA
e
VSNR IrRS
R r
![Page 35: Laboratorul de Microunde si Optoelectronica, Main ...rf-opto.etti.tuiasi.ro/docs/files/RECEPTOARE OPTICE...la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W,](https://reader033.vdocuments.mx/reader033/viewer/2022041816/5e5b41e7d5a82e660d7e80f5/html5/thumbnails/35.jpg)
Sensibilitate si BERExemplu
Sa calculam sensibilitatea unui hibrid InGaAs PD/TIA, pentru 2.5 Gbps, la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W, curentul efectiv de zgomot transpus la intrarea amplificatorului cu transimpedanta egal cu 500 nA, si raportul de stingere al semnalului optic 9 dB.
1010BER 12 72SNR .9 7 94er dB .
12 72 0 5 7 94 14 56 23 4
2 0 9 7 94 1. . A .
S . W . dBm. A W .
10THV mV 2 8TIAR , k
1012 72 0 5 7 94 12 8 7 11 21 5
2 0 9 7 94 1
mV. . A .. kS . W . dBm
. A W .
![Page 36: Laboratorul de Microunde si Optoelectronica, Main ...rf-opto.etti.tuiasi.ro/docs/files/RECEPTOARE OPTICE...la un BER = 10e(-10), presupunind responsivitatea detectorului de 0.9 A/W,](https://reader033.vdocuments.mx/reader033/viewer/2022041816/5e5b41e7d5a82e660d7e80f5/html5/thumbnails/36.jpg)
FOTODIODE CU AVALANSA
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Constructia fotodiodei cu avalansa
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Functionarea fotodiodei cu avalansa
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Curentul de intuneric
(39)D ds dgI I MI
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Caracteristica cistig – tensiune de polarizare
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Caracteristica cistig – tensiune de polarizare
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Parametrii de performanta ai APD
0 (40)S SI M R P
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Zgomotul in APD
2 2( ) 2 ( ) 2 41n L dg dsI APD q I I M FB qI B
1 2 1 43F kM k M
42k
1 11 2 1 44F k M k M
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Raportul semnal-zgomot si NEP in APD
2 2
24542 ( ) 2
L
L dg dsL
I MSkTBN q I I FBM qI BR
46nINEPMS
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Raportul semnal-zgomot si NEP in APD
124 47
x
optL dg L
kTMq I I R
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Raspunsul spectral
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Caracteristica de frecventa
1 482c
t L
f RCC R
0.35 49rc
tf RC
0.44 50c rdrd
f tt
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Conectarea la circuitul exterior