Microwave Photonics Technology Microwave Photonic ??? ??, ??, ??

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Microwave Photonics TechnologyMicrowave
Photonic ??? ??, ??, ??
????? ?? ?? ???
? ? ?
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What is Microwave Photonics (MWP)?
Microwave Signals over Fiber
Optical Fiber
Input Microwave Signals
Output Microwave Signals
E/O Conversion
O/E Conversion
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Advantages of MWP

Fiber Coaxial - Size
0.25 mm 2-6
mm - Weight
0.073 g/m 30100 g/m - Loss(dB/km)
0.40.8 10001500
- Time-Bandwidth Product gt106
102 - New
Functionality Many Possibilities

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Applications of MWP
?? ??
Microwave links for military
applications Photonic A/D converter
Microwave Photonics
??? ??? ?? ?????
?? ??
?? ??? ?? ??
???? ??? ?? LAN LMDS, ITS
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Application 1 ??? ??? ?? ?????
FTTCab
Indoor Wireless LAN
E/O
Fiber
Central Office
ITS
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Application 2 ?? ??
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Application 3 ?? ??
?? ??? 100GHz ?? ?? ??
Signal Processing
E/O
Fiber Optic Link
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Key Technologies for MWP
Optical Fiber
Input Microwave Signals
Output Microwave Signals
E/O Conversion
O/E Conversion
??
??
??
Microwave to Optical Signal Conversion
Direct Modulation or Heterodyne Tech. High
frequency, Low phase noise Stability
Optical to Microwave Conversion New
Functionalities - Photonic A/D Conversion
CNR, BER ?? Speed Linearity, Dynamic
range Noise
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MWP ?? ?? - Direct Modulation
MMW Source Data
Optical Fiber
LASER
Optical Rx
Modulator
- Simple if high speed devices are available -
High-speed driving electronics required -
Dispersion problems
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MWP ?? ?? - Heterodyne Technique
uncorrelated
P1
?1, ?1
IPD
?2 - ?1
correlated
?2, ?2
P2
Optical Fiber
partially correlated
MWP Signal
- No limitation on generated signal frequency -
Stability and Phase-Synchronization Problem
gt Injection-Locking Technique
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MWP ?? ?? ?? - ??
Microwave generator
OSA/ Interferometer
?RF
SL1
RF Spectrum Analyzer
Master Laser
PD
SL2
?
32GHz ?? ?? ??
Phase noise _at_100kHz offset -94.33dBc/Hz
?
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MWP ?? ?? ?? - 5? ?
gt 60GHz Microwave Photonic Signal Generation
?
Phase noise -90dBc/Hz _at_ 100GHz offset
?
Photonic Synthesizer ??
f gt 60GHz, Programmable
Continuous Sweep ??
f
?1
?2
f GHz
Control
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MWP ?? ??
??? speed
OPTICAL FIBER
O/E
E/O
DATA IN
DATA OUT
LO
LO
?Nonliearity
OPTICAL FIBER
O/E
E/O
f1
f2
f2
2f2-f1
f1
2f1-f2
?Noise
OPTICAL FIBER
O/E
E/O
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MWP ?? ?? ?? - ?? I
MMW-Source
30GHz Source
?
RF-Attenuator
Isolated DFB-LD
ML
?
100Mbps NRZ Pulse ??
RF-Source _at_ 3 GHz
EDFA
SL
Opt. Filter
Unisolated DFB-LD
100 Mbps NRZ Pulse Generator
30 GHz LO
Elec. Oscilloscope
Linear Amplifiers
PD
Mixer
Pre-Amplifiers
Rf-Spec. Analyzer
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MWP ?? ?? ?? - ?? II
Distortion Suppression by DFB-LD Sidemode
Injection Locking
?
light injection
9dB SHD Suppression
?
Pinj
ML
SL
Pout
Free-running
Injection locking
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MWP ?? ?? ?? - 5? ?
?
60GHz ??? fiber-on-radio ??? ?? ??? ??
???? ?? 1.2 Gbps ??? ??? ?? fiber-on-radio
prototype ??
??? ?? 1.2N Gbps ??? ??? ?? ? ??? ?? ?? ??
CNR, BER ??? ?? ??? ??? ?? ??
DATA IN
1.2Gbps
OPTICAL FIBER
LO1
O/E
E/O
DATA IN
LO2

DATA OUT
DATA IN
LOK
LON
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MWP ?? ??
MWP ?? ?? Filter, Oscillator, Mixer, Photonic
A/D Converter
O/E
DSP
A/D Converter
Optical Fiber
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MWP ?? ?? - Photonic A/D Converter
Very fast, high resolution A/D converter is
required
(J. Selected Area in Comm., vol. 17, no. 4, pp.
539, 1999)
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MWP ?? ?? ?? - ??
Phtonic A/D Converter ?? ??
?
Multi-wavelength optical pulse generation
??? ?? ?? ??
?
GHz? PLL ?? ??
Self-seeding? ?? pulse generation
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MWP ?? ?? ?? - 5? ?
GHz ??? Photonic A/D Converter ??
?
4 Gsample/s, 6 SNR-bit, 2 GHz BW ??
Time-stretching, TDM/WDM ?? ??
RFin
Electronic Quantizer
Mode-Locked Laser
Modulator
Photodetector
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??? ??
??? - ?? 1? - ?? ?? 6? - ?? ?? 5? - ?? ?? 1?
?? ?
?? 5?? ?? ??
SCI ?? ???
- SCI? Journal 14? ?? - ?? ?? ?? 2?
?? 4?
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?? ?? ??
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??? Vision
'?'??? '?'? ??
- ?? ??? ??? ??
- ???? ???? ?? ? ? ?? ?? ??
??? ??? ??
- ??? ? ??
?? Microwave Photonics ??? leader ??? ??
- ?? ? ??? ?? ??
- ????? ?? ?? (???? ? 7? ??)
- MWP ?? ?? ?? Homepage? ??
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??? Vision
???? ?? ??
- Program Committee Co-Chair, Korea-Japan Joint
Workshop on MWP, 2000, 2001
- Technical Program Committee Member,
International Topical Meeting on MWP, 2001
- Vice-Chair, ?? IEICE MWP Technical Committee,
2001-2003
- ??? MWP ?? ?? ?? ??? ??? ??