Effect of S-band on C-band and L-band transmission in multiband optical communication system

In optical fiber communication, multiband transmission has attracted significant attention as further capacity expansion within the conventional C-band is becoming increasingly challenging. We aim to exploit a broader portion of the optical fiber spectrum by extending transmission beyond the traditionally used C-band to include other bands such as the S-band and L-band. To enable practical use of these bands, it is necessary to study how non-linearities and interband interference will impact optical transmission systems. Research is needed to assess how one band affects other bands. In this work, we investigate these problems by evaluating the effect of S-band transmission on C-band and L-band, depending on various measurable parameters like OSNR and Q-factor. It is observed that the Q-factor of C-band with S-band is 45dB and without S-band is 55 dB.