Hi Atul Sharma,
Please refer to my answer at reply no. #34283, you have misunderstood the line from component library “see the functionality of the add component it simply adds a wavelength into the transmitted signal from the CW Laser.” this does not mean that you have to add directly CW laser output, rather adding a unmodulated signal is of no use. if there is nothing information at the added optical wavelength this is of no use. just think it logically you can add a unmodulated signal using OADM but what context this will help you, because I think the working of OADM is very much clear to you. Thanking you..
Regards,
Dhiman