WDM is the technology to separate different wavelengths of light at the receving end in optical signal transmission. Specifications Parameter 980/1550nm WDM or 1060/1550nm WDM 1310/1550nm WDM 1480/1550nm WDM Fiber Type(dB) Corning HI1060flex OR OFS BF05635-02 SMF-28e Operating wavelength (nm) 980 & 1550 1060&1550 1310&1550 1480&1550 Operating bandwidth (nm) ± 10/20 ±15