title: Optimally-designed single fiber Bragg grating filter scheme for RZ-OOK/DPSK/DQPSK to NRZ-OOK/DPSK/DQPSK format conversion.
abstract: 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 optimally-designed FBG can successfully perform RZ-OOK/DPSK/DQPSK to NRZ-OOK/DPSK/DQPSK format conversion.
authors.forename: Hui
authors.initials: H
authors.lastname: Cao
authors.forename: Xuewen
authors.initials: X
authors.lastname: Shu
authors.forename: Javid
authors.initials: J
authors.lastname: Atai
authors.forename: Adenowo
authors.initials: A
authors.lastname: Gbadebo
authors.forename: Bangyun
authors.initials: B
authors.lastname: Xiong
authors.forename: Ting
authors.initials: T
authors.lastname: Fan
authors.forename: HaiShu
authors.initials: H
authors.lastname: Tang
authors.forename: Weili
authors.initials: W
authors.lastname: Yang
authors.forename: Yu
authors.initials: Y
authors.lastname: Yu