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Simple three-dimensional simplex modulator | IEEE Conference Publication | IEEE Xplore

Simple three-dimensional simplex modulator


Abstract:

We devised a simple 3D simplex modulator containing only two Mach-Zehnder sub-modulators. The modulator has smaller intrinsic modulation loss than that with the conventio...Show More

Abstract:

We devised a simple 3D simplex modulator containing only two Mach-Zehnder sub-modulators. The modulator has smaller intrinsic modulation loss than that with the conventional configuration. It operated at 43 Gb/s.
Published in: OFC 2014
Date of Conference: 09-13 March 2014
Date Added to IEEE Xplore: 28 August 2014
ISBN Information:
Conference Location: San Francisco, CA, USA
Citations are not available for this document.

1. Introduction

The three-dimensional (3D) simplex modulation format is one of the promising formats for use in ultralong-haul transmission systems because it offers better receiver sensitivity than that with dual-polarization binary phase-shift keying (DP-BPSK) at a given bit rate and spectral bandwidth [1], [2]. In this 2-bit/symbol format, four symbol points are placed at each of the four apexes of a 3D simplex (tetrahedron) in the 3D space spanned by three out of four orthogonal axes of optical modulation, namely, in-phase (I) and quadrature (Q) axes of the two orthogonal polarizations. Since squared inter-symbol Euclidian distance divided by the average optical power in the 3D simplex format is 4/3 times larger than that of DP-BPSK, this format offers an asymptotic sensitivity gain of 1.2 dB over DP-BPSK, although this gain is reduced to ~0.7 dB at a high bit error rate (BER) of 10−3 because Gray coding is not possible. Experimental results with 3D simplex modulation have been reported in [2], where the signal was generated by driving three out of four Mach-Zehnder sub-modulators (sub-MZMs) in a standard dual-polarization quadrature phase-shift keying (DP-QPSK) modulator with three interdependent binary data signals.

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Cites in Papers - IEEE (1)

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Tomohiro Amemiya, Tomoya Yoshida, Yuki Atsumi, Nobuhiko Nishiyama, Yasuyuki Miyamoto, Youichi Sakakibara, Shigehisa Arai, "Orbital Angular Momentum Mux/Demux Module using Vertically Curved Si Waveguides", 2019 Optical Fiber Communications Conference and Exhibition (OFC), pp.1-3, 2019.
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References

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