White Paper CWDM components for 40 G and 100 G Transceivers D-5006 Results The deviation from the nominal 10-degree angle as a function of wavelength does create some minor shift in the center wavelength. However, if the deviation is kept within a fraction of a degree, less than 0.25, degrees, the effect is relatively small. If we compare this deviation with the insertion loss numbers in the previous section, the same 0.25 degrees of angular tolerance would generate approximately 5 dB of loss. 4 x 25 G Link Simulation The introduction of thin film filter optical multiplexing and demultiplexing in an optical link can produce chirp in the signal. This can be related to group delay dispersion of the filters. The impairment of the link with regard to chromatic effects is the combination of the interaction of pulse spreading and the fiber itself. To simulate the LAN CWDM link we have set up the basic transport link shown below using the 4 proposed center wavelengths. CWDM Optical Multiplexer CWDM Optical Demultiplexer 1319.51 nm 1314.88 nm 1310.28 nm 1305.72 nm The implementation would be to vary the position of each of the wavelengths within its own pass band. Filter pass bands Center wavelengths 1305.72 nm 1310.28nm 1314.88 nm 1319.51 nm Document: D-5006 Samples Samples Samples Samples Page 3/4
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