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Evaluation of the Inherent Ripple Effects on the Performance of an Optical DQPSK Signal Generated by Using Only One MZM

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5 Author(s)
Wei-Ren Peng ; Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu, Taiwan 300, R. O. C. ; Jason Chen ; Shen-You Tsai ; Cheng Tsao
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We analytically computed the optical spectra and numerically evaluated the ripple impacts on the performance of an optical DQPSK signal generated by only one MZM. We confirmed the necessity of a pulse carver to this kind of signal. The tolerances to the timing mismatch between the data and the pulse carver were analyzed among different duty-cycles. The conventional DQPSK signal generated by two parallel DPSK modulators were also analyzed for comparisons. We also provided some experimental results to demonstrate the possibility of the one-MZM scheme and the necessity of a pulse carver in terms of the clearly opened demodulated eyes.

Published in:

2006 International Conference on Photonics in Switching

Date of Conference:

16-18 Oct. 2006