Polynomial Pulses for Mitigating Fiber Nonlinearity in Coherent Optical Fiber Communications

Author

Karar, A.S. ; Gazor, S. ; Gao, Y. ; Cartledge, J.C. ; O´Sullivan, M. ; Laperle, C. ; Borowiec, A. ; Roberts, K.

Author_Institution

Dept. of Math. & Stat., Queen´s Univ., Kingston, ON, Canada

Volume

27

Issue

15

fYear

2015

fDate

Aug.1, 1 2015

Firstpage

1653

Lastpage

1655

Abstract

Root polynomial (RP) pulses are considered for mitigating fiber nonlinearity for 128 Gb/s dual-polarization 8-ary quadrature-amplitude-modulation dense wavelength division multiplexed (DWDM) systems. RP pulses exhibit a fast asymptotic decay rate, low peak-to-average power ratio, and narrow pulse width. Consequently, they are tolerant toward intrachannel nonlinearity, digital-to-analog converter quantization effects, and timing recovery errors. In a nine-channel DWDM transmission experiment with a 25 GHz channel spacing and null-to-null modulated optical signal bandwidth of 25 GHz, the RP pulse shape yields a maximum distance of 4800 km, which extends the transmission distance by 300 km (length of the recirculating loop) relative to the root raised cosine pulse shape.

Keywords

channel spacing; optical fibre amplifiers; optical fibre communication; optical pulse shaping; quadrature amplitude modulation; wavelength division multiplexing; RP pulse shape; bandwidth 25 GHz; bit rate 128 Gbit/s; channel spacing; coherent optical fiber communications; dense wavelength division multiplexed; digital-to-analog converter quantization; distance 300 km; distance 4800 km; dual-polarization 8-ary quadrature-amplitude-modulation DWDM systems; fast asymptotic decay rate; fiber nonlinearity mitigation; intrachannel nonlinearity; low peak-to-average power ratio; narrow pulse width; null-to-null modulated optical signal bandwidth; recirculating loop; root polynomial pulses; root raised cosine pulse shape; timing recovery errors; Bandwidth; Nonlinear optics; Optical fiber communication; Optical fibers; Optical pulse shaping; Polynomials; Shape; Coherent optical communications; coherent optical communications; digital signal processing; fiber nonlinearity; pulse shaping;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2433834

Filename

7109111