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In this paper, a parallel coupled optical ring resonator filter is studied and the transfer function is derived using the signal flow graph (SFG) approach to identify the filter performance in terms of crosstalk suppression bandwidth and signal integrity. This paper proposes the use of the SFG (Mason's rule) approach to determine the filtering characteristics of parallel coupled ring resonators. A...
New designs for a 1 times 4 and a 1 times 8 CWDM multiplexers based on cascaded groups of series coupled ring resonators are presented. Compared to other integrated optical alternatives such as MMI phasars, cascaded Mach-Zehnder interferometers and cascaded AWG, the proposed circuits offer superior performance in their very sharp roll-off factor that exceeds 0.75, their reduced crosstalk level that...
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