7 May 2013 A performance comparison between 33RZ-POMUX-DQPSK and 33RZ-DC-DQPSK using coherent detection for 1.6 Tb/s (16×100 Gb/s) over 1200 km
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Abstract
In this paper, we compare the performance of Polarization Multiplexing-Differential Quadrature Phase Shift Keying (POLMUX-DQPSK) and Dual Carrier-Differential Quadrature Phase Shift Keying (DC-DQPSK) with RZ (Return-to- Zero) carving and duty cycle of 33% in 100 Gb/s transmission systems. These formats appear to be the most promising technology for long-haul with coherent detection. POLMUX-DQPSK use the polarization dimension of the optical signal to transmit the information. DC-DQPSK uses two wavelengths to transmit the information. We discuss their back-toback receiver sensitivity and required Optical-to-Noise Signal Ratio (OSNR) for a Bit Error Rate (BER) equal to 10-9. We find that 33RZ-POLMUX-DQPSK has the best receiver sensitivity and lower OSNR penalty compared to 33RZ-DCDQPSK. For 33RZ-POLMUX-DQPSK sensitivity as reference, we can observe a benefit of 1.5 dB for 33RZ-DCDQPSK. Also, we can observe a benefit of 2.3 dB in OSNR for 33RZ-POLMUX-DQPSK compared to 33RZ-DCDQPSK. We study the robustness of these two optical modulation formats for transmission of 1.6 Tb/s (16×100 Gb/s) over 1200 km in dispersion compensated Wavelength Division Multiplexing (WDM) systems with 100 GHz channel spacing using two types of fibers Standard Single Mode Fiber (SSMF) and Non-Zero Dispersion Shifted Fiber (NZDSF). We find that 33RZ-DC-DQPSK is a suitable modulation formats in dispersion compensated WDM systems with 100 Gb/s channel spacing using NZDSF fiber. We simulate the nonlinear tolerance of optical 33RZ-POLMUX-DQPSK and 33RZ-DC-DQPSK formats. 33RZ-DC-DQPSK modulation format has the best robustness against the nonlinear fiber effects in NZDSF fiber.
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Abir Hraghi, Abir Hraghi, Mourad Menif, Mourad Menif, } "A performance comparison between 33RZ-POMUX-DQPSK and 33RZ-DC-DQPSK using coherent detection for 1.6 Tb/s (16×100 Gb/s) over 1200 km", Proc. SPIE 8781, Integrated Optics: Physics and Simulations, 87811F (7 May 2013); doi: 10.1117/12.2019469; https://doi.org/10.1117/12.2019469
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