Optical SSB Filters Free Twin-SSB Signal Detection with Self-Coherent Detection
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Abstract:
Dater center interconnection has stimulated the development of the short reach optical communication transmission. To increase the capacity of the SSB system with DD, the twin-SSB system can double the system capacity without extra op-tical modulator. Recently, Stokes vector receiver (SVR) bridges the coherent detection and DD. A carrier can be sent along with the signal so that the SVR can utilize the reference carrier to conduct self-coherent detection and realize a linear complex optical channel detection which is similar to the coherent receiver. In this paper, we propose an optical SSB filter and guard band free twin-SSB signal detection scheme with self-coherent detection based on SVR. The proposed scheme greatly reduces the implementation complexity and has higher spectral efficiency (SE) compared with the traditional twin-SSB signal detection which two narrow-band optical filters and guard band are used for SSB signal extracting and inter crosstalk suppression. Meanwhile, the proposed twin-SSB signal detection with self-coherent detection also helps to relax the receiver DSP, since the self-coherent detection reduces the inter crosstalk between the twin-SSB. The twin-SSB reception with self-coherent detection scheme makes it suitable for the future high-speed short and medium-reach applica-tions, such as the data center interconnect and metro area network.
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Project Supported:
Southwest Electronic Technology Research Institute Technology Innovation Fund Project (No. H19015)
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