Acta Optica Sinica, Volume. 31, Issue 2, 206002(2011)
Non-Return-to-Zero to Return-to-Zero Format Converter for Quaternary Amplitude Shift Keying Signal Based on Cascaded Modulators
A novel non-return-to-zero (NRZ) to return-to-zero (RZ) format converter for quaternary amplitude shift keying (4-ASK) signal is proposed based on phase-intensity modulators and one dispersion compensating fiber (DCF) module. The operation principle of the proposed converter is described theoretically. 20-Gb/s NRZ-4-ASK signal to RZ-4-ASK signal conversion is also experimentally demonstrated. The results show that 20-Gb/s NRZ-4-ASK signal could be successfully converted to RZ-4-ASK signal without wavelength shift and the pulse width of the converted signal is narrow. The timing-jitter of the converted signal is lower than the original one. The format converter could also be applied to multi-wavelength amplitude shift keying conversion.
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Yu Wenke, Lou Caiyun, Zhao Xiaofan, Lu Dan, Chen Jianhua. Non-Return-to-Zero to Return-to-Zero Format Converter for Quaternary Amplitude Shift Keying Signal Based on Cascaded Modulators[J]. Acta Optica Sinica, 2011, 31(2): 206002
Category: Fiber Optics and Optical Communications
Received: May. 24, 2010
Accepted: --
Published Online: Jan. 17, 2011
The Author Email: Wenke Yu (ywk07@mails.tsinghua.edu.cn)