
© 2009 Cisco Systems, Inc. All rights reserved.
33
Cisco PublicBRKBBA-2006
Components of DWDM PON Solution
AWG: Arrayed-Waveguide Grating
• Periodic filter characteristic: two bands per port (S- and C-Band)
• Fan-out 1/32 (32 upstream and downstream wavelengths)
λ1 / λ33
Trunk
4 - Port Optical Circulator
• Insertion of directed injection light
Out
Out
In
In
Out
λ
1
λ
2
λ
31
λ
32
Laser Arrays
• Generate the spectrum of injection wavelengths
Out
λ
33
λ
34
λ
63
λ
64
Transceiver:
• Receiver and transmitter in one SFP per fiber
• Receiver: wavelength agnostic
• Transmitter: Reflective Semiconductor Optical Amplifier
RX
TX
λ2 / λ34
λ31 / λ63
λ32 / λ64
Port 1
Port 2
Port 31
Port 32
Port 1 Port 2 Port 3
GHz
S-Band
C-Band
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