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Experimental demonstration of arrayed optical amplifiers with a shared pump laser for realizing colorless,
Yohei Sakamaki1, Takeshi Kawai, Mitsunori Fukutoku
1NTT Network Innovation Laboratories, NTT Corporation, 1-1 Hikarinooka, Yokosuka, Kanagawa 239-0874, Japan. sakamaki.youhei@lab.ntt.co.jp
Optics Express
|December 25, 2012
Summary
Arrayed optical amplifiers sharing a single pump laser enable colorless, directionless, and contentionless ROADM nodes. Experiments confirm feasibility, showing no significant penalty for high-speed signal transmission.
Area of Science:
- Optical networking
- Telecommunications engineering
Background:
- Reconfigurable Optical Add-Drop Multiplexer (ROADM) nodes are crucial for flexible optical networks.
- Existing ROADM architectures face challenges in achieving colorless, directionless, and contentionless operation.
Purpose of the Study:
- To propose and demonstrate arrayed optical amplifiers sharing a single pump laser for advanced ROADM nodes.
- To achieve full-add/drop colorless, directionless, and contentionless ROADM functionalities.
Main Methods:
- Fabrication of arrayed optical amplifiers.
- Experimental setup utilizing a single pump laser shared among multiple Erbium-Doped Fiber Amplifiers (EDFAs).
- Adjustment of a variable splitter's ratio for wavelength path reconfiguration.
Main Results:
- Successful demonstration of arrayed optical amplifiers sharing a single pump laser.
- Proper correspondence to wavelength path reconfigurations achieved by adjusting the splitting ratio.
- No significant signal degradation observed for 128-Gbit/s Polarization Division Multiplexing Quadrature Phase Shift Keying (PDM-QPSK) signals.
Conclusions:
- The proposed arrayed optical amplifier architecture is feasible for advanced ROADM nodes.
- This approach supports colorless, directionless, and contentionless operation.
- The system maintains signal integrity for high-capacity optical communications.
