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Dense optical wavelength division multiplexing (DWDM) is a combination of a group of optical wavelengths for transmission with a single fiber. This is a laser technology used to increase bandwidth on existing fiber backbone networks. More precisely, this technique is to multiplex the close spectral spacing of a single fiber carrier in a specified fiber in order to utilize the transmission performance that can be achieved (for example, to achieve the minimum degree of dispersion or attenuation ). In this way, under a given information transmission capacity, the total number of optical fibers required can be reduced.
| Parameter | Symbol | Description | Value | Unit | ||
| Min | Typ. | Max. | ||||
| Output Channel | CH | 48 | ||||
| Channel Spacing | 100 | GHz | ||||
| Reference Accuracy | PB | @ITU wavelength | -12.5 | - | +12.5 | GHz |
| Wavelength Accurancy | Δ入 | Offset from ITU: -5℃~+65℃ | -0.050 | +0.050 | nm | |
| Insertion Loss | IL | Worst IL@ Passband | -5.5 | dB | ||
| IL Uniformity | IL Unif. | Difference between max. IL and min. IL | 1.5 | dB | ||
| PDL | PDL | Max. case@passband | 0.5 | dB | ||
| Ripple | Ripple | @passband | 0.5 | dB | ||
| 1dB Bandwidth | BW1 | 1dB down from the peak IL | 0.38 | nm | ||
| 3dB Bandwidth | BW3 | 3dB down from the peak IL | 0.58 | nm | ||
| Adjacent Crosstalk | Ax | The difference between I.L. and adjacent Channel's transmission in band | 23 | dB | ||
| Non-Adjacent Crosstalk | nAx | The difference between I.L. and adjacent channel's transmission in passband | 30 | dB | ||
| Total Crosstalk | Tx | Cumulative crosstalk of all other channels | 21 | dB | ||
| Return Loss | RL | Input&Output | -40 | dB | ||
| Polarization Mode Dispersion | PMD | 0.5 | ps |
