Continuous Phase Modulation for Fiber-Optic Links

Advances in photonics, silicon electronics and digital signal processing (DSP) have converged to enable highly efficient transmission across fiber optic channels. Single wavelength data rates of 112 Gb/s are sought for wide deployment based on QPSK transmission, coherent detection, and digital demod...

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Veröffentlicht in:	Journal of lightwave technology 2011-12, Vol.29 (24), p.3659-3671
Hauptverfasser:	Detwiler, T. F., Searcy, S. M., Ralph, S. E., Basch, B.
Format:	Artikel
Sprache:	eng
Schlagworte:	100 Gb/s ethernet Applied sciences Circuit properties continuous phase modulation (CPM) Detection, estimation, filtering, equalization, prediction Electric, optical and optoelectronic circuits Electronics Exact sciences and technology Information, signal and communications theory Integrated optics. Optical fibers and wave guides Optical and optoelectronic circuits Optical fiber networks Optical filters Optical modulation optical networking Optical telecommunications Optical transmitters Phase shift keying Signal and communications theory Signal, noise Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Transmission and modulation (techniques and equipments)
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Beschreibung
Zusammenfassung:	Advances in photonics, silicon electronics and digital signal processing (DSP) have converged to enable highly efficient transmission across fiber optic channels. Single wavelength data rates of 112 Gb/s are sought for wide deployment based on QPSK transmission, coherent detection, and digital demodulation. Here we examine continuous phase modulation (CPM) as a means to enhance performance and reach of coherent optical links. We quantify the robustness of the constant amplitude CPM format to spectral filtering and nonlinearities in comparison to QPSK. The challenges of generating and receiving the CPM waveform are considered and a novel CPM transmitter architecture is proposed.
ISSN:	0733-8724 1558-2213
DOI:	10.1109/JLT.2011.2174193