optical signal processing
DESCRIPTION
general structure of the optical processor, optical analog Fourier processorTRANSCRIPT
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OPTICAL SIGNAL PROCESSINGOPTICAL SIGNAL PROCESSING
1.General structure of the optical processor1.General structure of the optical processor
2.Optical analog Fourier processor2.Optical analog Fourier processor
3.Optical analog correlation/convolution 3.Optical analog correlation/convolution processorprocessor
4. Optical digital processor4. Optical digital processor
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Optical signal processing
systems
Analog Digital
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Optical processorOptical processor
1 2 35
4
1- Laser; 2- SLM; 3- optical processing module; 4- memory and control module; 5- detector
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Optical analog Fourier processorOptical analog Fourier processor
Y
X
L SLM D
FL
U
V
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2D FOURIER TRANSFORMATION2D FOURIER TRANSFORMATION
FTFTFFx,yx,yFFu,vu,v==∫∫∫∫FFx,yx,yexpexpjj2π2πxu+yvxu+yvdxdxdydy
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OPTICAL JOINTOPTICAL JOINT FOURIER FOURIER TRANSFORMATION PROCESSORTRANSFORMATION PROCESSOR
CRT SLM
OPTICS
LASERJT
PLANE
CORRELOUTPUT
FTL
Data Bus
Control Bus
OS OM
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Optical analog Optical analog convolution/correlation processorconvolution/correlation processor
Y
X
L
SLM1SLM2
FL1
U
V
D
FL2
P
Q
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Optical analog Optical analog convolution/correlation processorconvolution/correlation processor
SLM1 FL1 SLM2 FL2 D
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CONVOLUTION/CORRELATION CONVOLUTION/CORRELATION SIGNALS PROCESSINGSIGNALS PROCESSING
CCξ,ηξ,η == ∫∫ ∫∫ FFx,yx,yH(xH(xξ,yξ,yη)dxdyη)dxdy --
F(x,y)F(x,y) – input signal – input signalH(x,y)H(x,y) - filter - filter
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CONVOLUTION/CORRELATIONCONVOLUTION/CORRELATION
The convolution function calculation The convolution function calculation based on 2D Fourier transformation:based on 2D Fourier transformation:
CCξ,ηξ,η== FT FT--
11FTFTFFx,yx,y}}FTFT{H(x,y)}}{H(x,y)}}= = = = FTFT-1-1FFu,vu,vH*H*u,vu,v
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OPTICAL PROCESSOR USING LASER DIODE OPTICAL PROCESSOR USING LASER DIODE ARRAYARRAY
S CRT L
M
OPTICSFILTERBANK
OUTPUTPLANE
LD ARRAY
FTL FTL
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MATRIX OF SEMI-CONDUCTIVE LASERSMATRIX OF SEMI-CONDUCTIVE LASERS
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COMPACT OPTICAL PROCESSORCOMPACT OPTICAL PROCESSOR2
0
150100
20
1
2
3 4 5 6
7
8 9 10
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OPTICAL CORRELATION PROCESSOROPTICAL CORRELATION PROCESSOR
Time of optical correlation Time of optical correlation function calculation: function calculation: 1010-8-8 sec sec
The processor productivity:The processor productivity:
10101414 Bits/sec Bits/sec
The volume of optical processor The volume of optical processor 13 cm13 cm33
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OPTICAL DIGITAL PROCESSOROPTICAL DIGITAL PROCESSOR
5 0 1 3 2
7 2 5 4 3
2 1 0 7 6
5 4 3 2 1
0 7 6 5 4
2 3
2 1 0
3 2 1
0
5 4
1 0
5 4 1
0 5 4
4
0
4
0 4
+ +
0 1