Optimally-designed single fiber Bragg grating filter scheme for RZ-OOK/DPSK/DQPSK to NRZ-OOK/DPSK/DQPSK format conversion


We investigate return-to-zero (RZ) to non-return-to-zero (NRZ) format conversion by means of the linear time-invariant system theory. It is shown that the problem of converting random RZ stream to NRZ stream can be reduced to constructing an appropriate transfer function for the linear filter. This approach is then used to propose novel optimally-designed single fiber Bragg grating (FBG) filter scheme for RZ-OOK/DPSK/DQPSK to NRZ-OOK/DPSK/DQPSK format conversion. The spectral response of the FBG is designed according to the optical spectra of the algebraic difference between isolated NRZ and RZ pulses, and the filter order is optimized for the maximum Q-factor of the output NRZ signals. Experimental results as well as simulations show that such an optimallydesigned FBG can successfully perform RZ-OOK/DPSK/DQPSK to NRZOOK/ DPSK/DQPSK format conversion.

Publication DOI: https://doi.org/10.1364/OE.22.030442
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Engineering & Applied Sciences
Additional Information: Funding: National Natural Science Foundation of China (grant 61178030), the Natural Science Foundation of Guangdong Province, China (grant S201101000122), the Fundamental Research Funds for the Central Universities, China (HUST: 2013TS047.
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.osa ... =oe-22-25-30442 (Publisher URL)
PURE Output Type: Article
Published Date: 2014-12-01
Authors: Cao, Hui
Shu, Xuewen
Atai, Javid
Gbadebo, Adenowo ( 0000-0003-2674-8669)
Xiong, Bangyun
Fan, Ting
Tang, Haishu
Yang, Weili
Yu, Yu


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