Cascaded Lithium Niobate Mach-Zehnder Optical SSB Modulators for Multi-Carrier Signals


IEICE TRANSACTIONS on Electronics   Vol.E90-C    No.10    pp.2012-2021
Publication Date: 2007/10/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.10.2012
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Lasers, Quantum Electronics
optical single sideband (SSB) modulation,  microwave photonics,  optical network,  

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This paper clarifies the sideband suppression ratio (SSR) value needed for multi-carrier signal modulation in an optical single sideband (SSB) modulator. An SSR value of about 25 dB is found to be sufficient for broadcast satellite (BS) multi-carrier signal modulation. For FM converted CATV signal modulation, an SSR value of about 10 dB is sufficient. In addition, the properties of cascaded lithium niobate Mach-Zehndar (LN MZ) optical SSB modulators are clarified to be better than those of the conventional single LN MZ optical SSB modulator with nearly the same SSR value of 27 dB.