curs 1 2020/2021 - laboratorul de microunde si
TRANSCRIPT
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Curs 1
2020/2021
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La facultate, profesorul intreaba: - Intrebare de "nota 10": cum ma numesc? Toti tac. - Intrebare de "nota 8": la ce obiect aveti examen? Toti tac. - Intrebare de "nota 5": ce culoare are manualul (site-ul laboratorului)? Din ultimele randuri se aude o voce: - Vrea sa ne pice magaru'!
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2C/1L Optoelectronică OPTO Minim 7 prezente curs + laborator Curs - conf. Radu Damian ◦ an IV μE ◦ Miercuri 11-14, online, Microsoft Teams ◦ E – 70% din nota (50+20), online, rf-opto 20% test la curs, saptamana 4-5?
◦ probleme + (? 1 subiect teorie) + (2p prez. curs) ◦ toate materialele permise
Laborator – sl. Daniel Matasaru ◦ an IV μE
Marti 10-14 impar/par
◦ L – 30% din nota (+Caiet de laborator)
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Curs ◦ Miercuri 11-14, online
◦ 2C 3C
14*2/3 ≈ 9.33
9÷10 C ≈ 9C + E
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Sinapse “inginerești”
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> 2010 < 1950
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Lumina ca undă electromagnetică (ecuaţiile lui Maxwell, ecuaţia undelor, parametrii de propagare)
Elemente de fotometrie şi radiometrie (mărimi energetice/luminoase) Fibra optică (realizare, principiu de funcţionare, atenuare, dispersie,
banda de frecvenţă) Cabluri optice (tehnologie, conectori, lipire - splice) Proiectare sistemică a legăturii pe fibra optică (bandă de frecvenţă,
balanţa puterilor) Emiţătoare optice (LED şi dioda laser - realizare fizică şi functionare) Receptoare optice (dioda PIN, dioda cu avalanşă - realizare fizică şi
functionare) Amplificatoare transimpedanţă (parametri, scheme tipice, TIA în buclă
deschisă, cu reacţie, diferenţiale, control automat al câştigului) Realizarea circuitelor pentru controlul emiţătoarelor optice (parametri,
scheme tipice, controlul puterii, multiplexoare) Dispozitive de captare a energiei solare (principiu de functionare,
utilizare, proiectare )
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http://rf-opto.etti.tuiasi.ro
Irinel Casian-Botez, "Structuri Optoelectronice", Ed. "CANOVA", Iasi 2001, ISBN 973-96099-2-9
Behzad Razavi – Design of Integrated Circuits for Optical Communications, Mc Graw Hill http://rf-opto.etti.tuiasi.ro/docs/opto/
IBM - Understanding Optical Communications: on-line http://www.redbooks.ibm.com
Radu Damian, I Casian, D Matăsaru - „Comunicatii Optice” , Indrumar de laborator, 2005
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RF-OPTO ◦ http://rf-opto.etti.tuiasi.ro
Fotografie ◦ de trimis prin email: [email protected]
◦ necesara la laborator/curs
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Personalizat
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Minim 7 prezente
0.5p/2(3)prez
3 teste
foto <C3/<C5
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acces la examene necesita parola primita prin email
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acces email/parola
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primita prin email
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Aplicatia de examen online utilizata intens la: ◦ curs (prezenta)
◦ miniteste
◦ examen
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intotdeauna contratimp ◦ perioada lunga (prezenta curs/rezultate laborator)
◦ perioada scurta (teste: 15min, examen: 2h)
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subiecte individuale
Note ◦ 2007: 9.67±0.66/8.81±1.22
◦ 2008: 6.24±1.36/ 4.82±2.10
◦ 2009: 5.10±1.46
◦ 2010: 3.89±1.32
La prima aplicare (neanuntata) ◦ 50% din studenti au parasit examenul in primele 10 minute
◦ 50% din cei ramasi nu au promovat
◦ promovabilitate totala 25%, rata contestatiilor: 0%
Urmatoarele examinari (anuntate) ◦ rata contestatiilor: 0%
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subiecte individuale
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2018/2019 - clasic
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2019/2020 – online
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0 dBm = 1 mW 3 dBm = 2 mW 5 dBm = 3 mW 10 dBm = 10 mW 20 dBm = 100 mW -3 dBm = 0.5 mW -10 dBm = 100 W -30 dBm = 1 W -60 dBm = 1 nW
0 dB = 1 + 0.1 dB = 1.023 (+2.3%) + 3 dB = 2 + 5 dB = 3 + 10 dB = 10 -3 dB = 0.5 -10 dB = 0.1 -20 dB = 0.01 -30 dB = 0.001
dB = 10 • log10 (P2 / P1) dBm = 10 • log10 (P / 1 mW)
[dBm] + [dB] = [dBm]
[dBm/Hz] + [dB] = [dBm/Hz]
[x] + [dB] = [x]
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Capitolul 1
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Comunicatii ◦ Infrarosu (InGaAsP)
Vizibil ◦ Spectru vizibil (GaAlAs)
Iluminare ◦ Putere ridicata, lumina alba (GaInN)
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1995 2000 2005 2010 An
10
20
30
40
50
Incarcare relativă
1990
Total: 35%/an
Voce: 10%/an Sursa:
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Year Global Internet Traffic
1992 100 GB per day
1997 100 GB per hour
2002 100 GBps
2007 2,000 GBps
2015 20,235 GBps
2020 61,386 GBps
Source: Cisco VNI, 2016
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Greutate şi volum Costul materialelor primare ◦ SiO2/Cu
Capacitate de transmisie a informaţiei f~200THz ◦ 15.5 Tbit/s @ 7000 km, 69.1Tb/s @ 240km ◦ 159 Tb/s @ 1045 km ◦ Banda (Viteza) x Distanţă [MHz·km] [ ? MHz/km]
Lipsa conexiunilor electrice ◦ Bucle de masă (1-2V/km) ◦ Siguranţă în exploatare ◦ Imunitate la fulgere/lipsa scânteilor
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Imunitate la interferenţă electromagnetică
Distanta între repetoare ◦ 100km/2-5km
Posibilitate de creştere a capacităţii de transmisie a informaţiei ◦ Teoretic extrem de mare (aproape infinită) f~200THz
◦ Reutilizarea cablurilor existente
Securitate ◦ Interceptare dificilă şi detectabilă
◦ Inserare de semnal practic imposibilă
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Conexiuni complexe şi esenţiale ◦ Costul circuitelor integrate cresut considerabil de
cuplarea luminii in fibra
Curbarea cablurilor optice Dezvoltarea greoaie a standardelor Optica folosită strict pentru transmisie
(aproape) ◦ EDFA - Erbidium Dopped Fiber Amplifier
Sensibilitate la radiaţii gama şi câmpuri electrice intense
Rozătoare şi termite