Available Spectral Space in C-Band Expansion Remaining After Optical Quantization Based on Intensity-to-Lambda Conversion

Yuta KAIHORI  Yu YAMASAKI  Tsuyoshi KONISHI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E103-B   No.11   pp.1206-1213
Publication Date: 2020/11/01
Publicized: 2020/05/14
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2019OBI0002
Type of Manuscript: INVITED PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
photonic analog-to-digital conversion,  optical quantization,  spectral compression,  four-wave mixing,  sum-frequency generation,  

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Summary: 
A high degree of freedom in spectral domain allows us to accommodate additional optical signal processing for wavelength division multiplexing in photonic analog-to-digital conversion. We experimentally verified a spectral compression to save a necessary bandwidth for soliton self-frequency shift based optical quantization through the cascade of the four-wave mixing based and the sum-frequency generation based spectral compression. This approach can realize 0.03 nm individual bandwidth correspond to save up to more than 85 percent of bandwidth for 7-bit optical quantization in C-band.