Title :
A Simple NRZ-OOK to PDM RZ-QPSK Optical Modulation Format Conversion by Bidirectional XPM
Author :
Yu-Hsiang Wen ; Kai-Ming Feng
Author_Institution :
Inst. of Photonics Technol., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
We proposed and experimentally demonstrated an all-optical modulation format conversion mechanism by applying bidirectional cross-phase modulation in a single highly nonlinear fiber. In our experiment, four individual 12.5 Gb/s nonreturn to zero ON-OFF keying signals are successfully converted to a 50-Gb/s polarization division multiplexed return to zero quadrature-phase shift keying signal within a satisfactory power penalty. The performance and feasibility of the proposed converter are both numerically and experimentally investigated. Moreover, the timing-mismatch tolerance among all the signals in the proposed format converter is also analyzed.
Keywords :
amplitude shift keying; multiplexing; nonlinear optics; optical communication equipment; optical fibre communication; optical fibre polarisation; optical modulation; optical phase shifters; phase modulation; quadrature phase shift keying; NRZ-OOK-PDM RZ-QPSK optical modulation format conversion; bidirectional cross-phase modulation; nonreturn-to-zero ON-OFF keying signals; numerical anlaysis; polarization division multiplexed return-to-zero quadrature-phase shift keying signal; single highly nonlinear fiber; timing-mismatch tolerance; Fiber nonlinear optics; Modulation; Optical fibers; Optical polarization; Probes; Highly non-linear fiber (HNLF); Highly non-linear fiber (HNLF),; cross phase modulation (XPM); modulation format conversion; polarization division multiplexing (PDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2399917
