DWDM with ROADM

ROADM:
Reconfigurable Add Drop Multiplexer

traditionally used in conjunction with DWDM system, basically to convert Optical signan to Electrical signal.

recently on order to selectively convert a single optical signal of a specific wavelength, it has been used.

ROADM consist of 3 basic component

1. Wavelength selective switch
2. Amplifier 
3. Channel Monitor




Here you can see, ROADM are used to at both end to convert electrical signal in to optical


Here you can see that electrical signal is further converted in by other network devices , Like Model Digital to Analog, Passed to firewall, router and switch inside a network and finally data is delivered to specific device/computer/system




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