Hybrid QAM-Based Labels Generated by Two Multi-Level PSK Codes

Takahiro KODAMA  Gabriella CINCOTTI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E102-B   No.12   pp.2199-2204
Publication Date: 2019/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2019EBP3024
Type of Manuscript: PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
optical packet switching,  optical code label,  quadrature amplitude modulation,  

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Summary: 
Hybrid 200Gchip/s QAM-based opto-electrical labels with high orthogonality are generated using the convolution of optical 16-level and electrical 4-level PSK codes. The combined simultaneous use of optical and electrical encoding increases system flexibility and code orthogonality, as well as code recognition performance. By performing 50 G-class low-speed LN-PM-based electrical processing on the 200 Gchip/s PSK-based optical code labels generated by a multiport optical encoder, the value of PCR indicating the code orthogonality is increased significantly, and the receiver sensitivity is improved by 0.5dB to achieve LER =10-9 in the next-generation optical packet switching networks.