A Transponder Aggregator with Efficient Use of Filtering Function for Transponder Noise Suppression
Kenya Suzuki, Osamu Moriwaki, Koichi Hadama, Keita Yamaguchi, Hiroki, Taniguchi, Yoshiaki Kisaka, Daisuke Ogawa, Makoto Takeshita, Stefano Camatel,, Yiran Ma, Mitsunori Fukutoku

TL;DR
This paper proposes an economical transponder aggregator with filtering capabilities to suppress ASE noise in multiband optical networks, verified through prototype fabrication and transmission experiments.
Contribution
It introduces a cost-effective transponder aggregator design that allows ASE superposition, reducing filtering complexity for multiband CDC-ROADM systems.
Findings
Prototype verified feasibility through transmission experiments
Improved OSNR performance in multiband systems
Cost reduction in transponder aggregator implementation
Abstract
Colorless, directionless, and contentionless reconfigurable optical add/drop multiplexing (CDC-ROADM) provides highly flexible physical layer network configuration. Such CDC-ROADM must operate in multiple wavelength bands which are being increasingly implemented in optical transmission systems. The operation in C+L bands requires switch devices used in CDC-ROADM to also be capable of multiband operation. Recent studies on wavelength division multiplexing (WDM) systems have pointed out the impact of amplified spontaneous emission (ASE) noise generated by signals of different wavelengths, which causes OSNR degradation. Therefore, it is desirable to filter out the ASE noise from different transponders when multiplexing multiple wavelengths at the transmitter side, especially in a system with non-wavelength selective combiners such as directional couplers and multicast switches. The use of…
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Taxonomy
TopicsAdvanced Optical Network Technologies · Advanced Photonic Communication Systems · Optical Network Technologies
