Performance Analysis of Optical Single Sideband Modulation Based on Mach-Zehnder Interferometers and Its Dispersive Fiber Transmission

Katsumi TAKANO  Yuuki NAGANUMA  Kiyoshi NAKAGAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B   No.5   pp.1994-2003
Publication Date: 2005/05/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.5.1994
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Joint Special Section on Recent Progress in Optoelectronics and Communications)
Category: Transmission Systems and Technologies
Keyword: 
SSB,  modulation format,  modulator,  Hilbert transform,  fiber communications,  

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Summary: 
Modulator output and fiber transmission characteristics of optical single sideband (SSB) modulations are analyzed under the assumption that SSB modulators are constructed using Mach-Zehnder (MZ) interferometers. The fiber input signal and the detected signal are derived theoretically for SSB modulation with and without an optical carrier. Optical SSB fiber transmission simulations show that the received signal waveform is degraded by harmonic components due to non-linear switching curve of MZ interferometer as a component of SSB modulators even if the Hilbert transformers is ideal for the definition. The optical SSB suppressed carrier is preferred to the SSB with an optical carrier from a viewpoint of waveform degradation.