Microwave Photonics For Space Systems Cours 2 Anglique Rissons
[email protected] 13/07/15ISAE 20142 I.Introduction:
-definition, Chronicle, applications II.Microwave Photonic Space
Application & Space Qualification
III.Microwave//Opticaltechnology:(reception, amplification,
oscillation) III-1 Optical Amplifier III-2 Laser Diode III-3
receiver I.Photonic transmission of microwave signal
(optoelectronics terminals optical Fiber-budject link) 13/07/15ISAE
20113 |ectron|quehoton|que|ectron|que opto|ectron|que
opto|ectron|que ulodes laser LLu ModulaLeur hoLodlode
hoLoLranslsLor llbre Cpuque AmpllcaLeur a bre dopee Muluplexeur...
4 LM ACu 1ransmlLer 8epeaLer or Cpucal ampller llber Cpuc
hoLodeLecLor uaLa 13/07/15ISAE 20115 8Load hoLodlode Laser dlode
ulrecL Modulauon 8Load hoLodlode Laser dlode LxLernal Modulauon
LlecLro-opucmodulaLor 60I IPOL = 7 l Slgnal modulauon Laser dlode
CW0 ouL(L) Cpucal modulaLor 13/07/15ISAE 20148 I.Introduction:
-definition, Chronicle, applications II.Microwave Photonic Space
Application & Space Qualification
III.Microwave//Opticaltechnology:(reception, amplification,
oscillation) III-1 Optical Amplifier III-2 Laser Diode III-3
receiver I.Photonic transmission of microwave signal
(optoelectronics terminals optical Fiber-budject link) In 70th, the
Multimode fiber optic utilization involved limitation due to the
modal scattering caused by the various propagation velocity of the
FO modes. ! A periodically signal regeneration is required,
implying a light signal detection, a complete electronic processing
including a signal resynchronization and conditioning => The
regenerated information is modulated by a new optical carrier..!
Single mode FO deployment, no scattering, only the spectral
attenuationcontribute to the limitation of the transmission link
length ! Regeneration non required but only linear amplification is
required.9 Long distanceoptical link70th Corning research and
technology works :" Attenuation decrease (from 100dB up to 0.2 dB
per km)"repeater per 100kms, utilization of 1550nm band10 Weakness:
Electronic amplifier bitrate limited to 500Mbit/s#All optical
amplification (Electrons-photons transduction suppressed) # Bit
rate increase CpLoelecLronlc repeaLer Photodiode
Conditioningelectronic amplifierBias Emitter Modulator 11 !Optical
amplification: $ simple and cost effectiveless than optoelectronic
repeater-regenerater.NB: the complexity and cost increase
considerably with the bitrate/channel. +The optical amplifier
allows simultaneously and without distortion the Multiplexing of
100 wavelength. !The optical amplification deployment was achieved
during the 90th in the transmission systems for telecom networks
(land and submarine) !12 Optical amplifier advantage Two kind of
amplifier: - Laser effect amplifier - Raman Effect Amplifier Laser
effect amplifier: The active region is constituted by a materials
allowing the stimulated emission and place into the core of a
single mode waveguide allowing a low consumption and minimizing the
losses.13 The amplifier have to: - answer to the wavelength
constraints - have a minimized spectral linewidth (30nm, 3600 GHz)
- have a high gain (20 30 dB) to satisfy the factor of merit Two
kind of laser effect amplifier: - Rare Earth Doped Fiber Amplifier,
i.g. EDFA=Erbium Doped FA, YDFA= Ytterbium DFA, PrDFA,
PraseodymiumDFA - Semiconductor Optical Amplifier SOA
14 Plgh specLral bandwldLh: 40nm!! 15 High Bandwidth
(40Gbit/s)Amplification of several wavelength simultaneously:
Wavelength Division Multiplexing (WDM) over the amplification band
of the Erbium ion into the silica lattice (1530nm 1560 nm) 16
>Propagation according to Oz Axis >Gain
coefficient>Amplifier Gain
dPdz = g(!)! P " P(z) = P(0)egzif P g !( )! G L( ) max for L $
20 ! 40m17 >Bande passante B = !!g "Ln2Ln G0 2( )#$%%&'((1
2avecGO = eg0L!!g =1"#218 1931/05/2013VCSEL Day 2013, EPFL,
Lausanne, Switzerland 2031/05/2013VCSEL Day 2013, EPFL, Lausanne,
Switzerland 3 sources d'lnLeracuon avec emlsslon sponLanee ampllee
(ASL) Slgnal-ASL ASL-ASL 8ln-ASL Ln prauque : nLulA= nS-ASL +
nASL-ASL + n8ln-ASL !"# %&'(&)*+ ,- .(/)&0
12343,54+*456 Ln prauque: 2 mesures de la pulssance de brulL avec
(n2) /sans LulA (n1) Z esL l'lmpedance de l'ampllcaLeur elecLrlque
du phoLodeLecLeur,
lacLeur de 8rulL: en d8 = nolse llgure Crdres de grandeur
Pp=10mW; !p=0.98m; L=30m ! NF=3.2dB Pp=25mW; !p=1.48m; L=60m !
NF=4dB 7" 8&),+ ,+ 9+.-'+ :; 2 Isand S " 0 I " Is and S = 0(Ns
= Threshold carrier number andIs = threshold current) if N! Ns
" 0 , $ " 0 lll. Laser ulode: 8aLe equauons, sLeady sLaLe
resoluuon60Threshold determination Above threshold(l ls ), N "
ns
Current/carrier relationship 0 = ! !"s ns iS NqI#
#$Photons/Current for I>Is:lll8aLe equauons, sLeady sLaLe
resoluuon61 Optical Power vs current relationship for I>Is
Current /Photon number relationship: and lll.8aLe equauons, sLeady
sLaLe resoluuon62!resonance n) !S) (Lhrough C) S) ! n. l(L) ! n)
Modulauon ! repauuon du phenomenelll.8aLe equauons, dynamlc
behavlor 630I IPOL = lll. ulode laser modulauon peuL slgnal 64%I,
%N, %S: small signal linearization and lll. Laser ulode: small
slgnal modulauon 65 lll. small slgnal modulauon 66lll. small slgnal
modulauon 67-> frequencial domain pulsation # !frquency f=#/2n
For each X close to X0 " Xm
