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Belief Introduction of Arrayed Waveguide Grating-AWG DWDM:
Array waveguide grating is based on basic optical principle of different wavelengths linear interference between each other. This means that, if every channel use the wavelength nuances with the light, the light of the many channels can be carried by a single optical fiber, and there is only negligible signal crosstalk.The array waveguide grating, in the transmission end, can compound the lights of multiple channels into a single optical fiber, and at the same time, separate the lights again at the receiving end.
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Parameters |
Condition |
Specs |
Units |
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|
Min |
Typ |
Max |
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|
Number of Channels |
40 |
||||
|
Number Channel Spacing |
100GHz |
100 |
GHz |
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|
Cha. Center Wavelength |
ITU frequency. |
C -band |
nm |
||
|
Clear Channel Passband |
±0.1 |
nm |
|||
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Wavelength Stability |
Maximum range of the wavelength error of all channels and temperatures in average polarization. |
±0.05 |
nm |
||
|
-1 dB Channel Bandwidth |
Clear channel bandwidth defined by passband shape. For each channel |
0.4 |
nm |
||
|
-3 dB Channel Bandwidth |
Clear channel bandwidth defined by passband shape. For each channel |
0.6 |
nm |
||
|
Optical Insertion Loss at ITU grid |
Defined as the minimum transmission at ITU wavelength for all channels. For each channel, at all temperatures and polarizations. |
4.5 |
6.0 |
dB |
|
|
Adjacent Channel Isolation |
Insertion loss difference from the mean transmission at the ITU grid wavelength to the highest power, all polarizations, within the ITU band of the adjacent channels. |
25 |
dB |
||
|
Non-Adjacent, Channel Isolation |
Insertion loss difference from the mean transmission at the ITU grid wavelength to the highest power, all polarizations, within the ITU band of the nonadjacent channels. |
30 |
dB |
||
|
Total Channel Isolation |
Total cumulative insertion loss difference from the mean transmission at the ITU grid wavelength to the highest power, all polarizations, within the ITU band of all other channels, including adjacent channels. |
22 |
dB |
||
|
Insertion Loss Uniformity |
Maximum range of the insertion loss variation within ITU across all channels, polarizations and temperatures. |
1.0 |
1.5 |
dB |
|
|
Directivity(Mux Only) |
Ratio of reflected power out of any channel(other than channel n)to power in from the input channel n |
40 |
dB |
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|
Insertion Loss Ripple |
Any maxima and any minima of optical loss across ITU band, excluding boundary points, for each channel at each port |
0.5 |
dB |
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|
Optical Return loss |
Input & output ports |
40 |
dB |
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|
PDL/Polarization Dependent Loss in Clear Channel Band |
Worst-case value measured in ITU band |
0.3 |
0.5 |
dB |
|
|
Polarization Mode Dispersion |
0.5 |
ps |
|||
|
Maximum Optical Power |
23 |
dBm |
|||
|
MUX/DEMUX input/ output Monitoring range |
-35 |
+23 |
dBm |
