POINTek research endeavored to integrate Athermal AWG demultiplexer with two types of noble PD arrays as part of a key building block for fiber channel motoring and FBG interrogation: (1) Tap PD arrays which can provide 2% power to the PD arrays for channel monitoring and 98 % power to the designated optical receiver and (2) Terminal PD arrays which terminates as a ribbon fiber pigtail to the PDs for channel monitoring alone.
1. Athermal AWG Demultiplexer with Tap PD Arrays
This Tap-PD Array integrated Demultiplexer product (see Figure 1) consists of an athermal AWG demultiplexer and the 2:98 Tap PD arrays, which tap only 2% power to the PDs and 98% power to pass through. Thus, the demultiplexed signals with 98% optical power can be delivered to the designated optical receiver while the demultiplexed signals with taped 2% optical power are delivered to the designated PD arrays for channel monitoring. The Integrated 2:98 power split design allows that no discrete Demultiplexer is required for the channel monitor beyond the trunk line since athermal AWG takes on the role of demultiplexing both the main signals and the monitor signals.