Theoretical sensitivity of direct-detection multilevel modulation formats for high spectral efficiency optical communications

    Authors

    Y. Han;G. F. Li

    Comments

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    Abbreviated Journal Title

    IEEE J. Sel. Top. Quantum Electron.

    Keywords

    advanced modulation formats; amplitude-shift keying (ASK); differential; amplitude-phase-shift keying (DAPSK); differential detection; differential phase-shift keying (DPSK); differential; polarization-phase-shift keying (DPolPSK); optical fiber communications; phase modulation; polarization modulation; LIGHTWAVE SYSTEMS; RZ-DQPSK; TRANSMISSION; SIGNALS; GB/S; RECEIVERS; AMPLITUDE; DECISION; SCHEME; OD8PSK; Engineering, Electrical & Electronic; Optics; Physics, Applied

    Abstract

    Sensitivities of several direct-detection multilevel modulation formats, including M-ary differential phase-shift keying (M-DPSK), M-ary differential amplitude-phase-shift keying (M-DAPSK), and M-ary differential polarization-phase-shift keying (M-DPoIPSK) are systematically calculated. The theory is based on a unified mathematical framework for direct-detection receivers using optical delay interferometers and balanced detectors. Results quantitatively elucidate the tradeoffs between these direct-detection multilevel modulation formats as well as the classic multilevel modulation format, M-ary amplitude-shift keying (MASK). Although the conventional bit error rate estimation method based on the eye Q-factor with Gaussian approximation is not accurate enough for DPSK and DQPSK, it is found to be reasonably accurate for M-DPSK with M > 8 and in M-DPoIPSK.

    Journal Title

    Ieee Journal of Selected Topics in Quantum Electronics

    Volume

    12

    Issue/Number

    4

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    571

    Last Page

    580

    WOS Identifier

    WOS:000239745000012

    ISSN

    1077-260X

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