You guys are very helpful. thanks for all the great comments.
So while checking I found out that I might be wrong considering the wrong transition network SFP.
Instead of TN-SFP-LXB162 WDM , we should consider TN-SFP-LX16.
I think LX161 and 162 are used in pairs as they have different wavelengths per transmit/receive. Instead we have to consider LX16.
Am I right ? Could you please help me a bit more to finalize this problem.