Abstract
This paper proposes and numerically demonstrates an all-optical on-off keying (OOK) to 16 quadrature amplitude modulation (QAM) format conversion using nonlinear optical loop mirror (NOLM) based on cross-phase modulation (XPM) and parametric amplification in optical fibers. The 16-QAM signal is generated by the superposition of two quadrature phase shift keying (QPSK) signals with different amplitudes. OOK to QPSK modulation format conversion is achieved by XPM in one highly nonlinear fiber (HNLF). The amplitude ratio 2:1 of two QPSK signals can be realized by parametric amplification. The feasibility of OOK to 16-QAM modulation format conversion is confirmed at the symbol rate of 10 Gs/s by numerical simulation with the length of <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$2^{7}-1$</tex></formula> pseudo random binary sequence (PRBS) input OOK signals. The tolerance of power deviation of the converter is also analytically evaluated.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
