Abstract
Abstract This paper investigates the transmission performance of 16-channel DWDM (Dense Wavelength Division Multiplexing) system with two complex Optical Differential Quadrature Phase Shift Keying modulator configurations using 2 LiNb MZM (Mach-Zehnder Modulator) and 3 LiNb MZM. The link performance is evaluated for 100 Gbps data rate per channel in a total 750 km single mode fiber link. The perfomance is analyzed in terms of forward power, reflected power and bit-error rate of the received signal. From the simulation results we prove, that the link performance can be improved by adopting the high efficiency optical modulation.
Highlights
This paper investigates the transmission performance of 16-channel DWDM (Dense Wavelength Division Multiplexing) system with two complex Optical Differential Quadrature Phase Shift Keying modulator configurations using 2 LiNb Mach-Zehnder optical modulators (MZM) (Mach-Zehnder Modulator) and 3 LiNb MZM
The aim of this paper is to provide a comparative analysis of two optical modulation techniques, Differential Quadrature Phase Shift Keying (DQPSK) and CSRZDQPSK, in a DWDM system with capacity of 16×100 Gbps
The signal spectra of the CSRZ-DQPSK optical modulator based on 3 MZMs emitting 193 THz are shown in Figure 4 [11, 12]
Summary
The conventional optical DQPSK modulator structure, based on two arms LiNb MZM driven by in-phase and quadrature-phase signal components, is shown on Figure 1. Using these two equations it is possible to calculate amplitude modulation AIQM(t) (3) and phase modulation φIQM(t) (4) of IQ modulator [4]. The signal spectra of the CSRZ-DQPSK optical modulator based on 3 MZMs emitting 193 THz are shown in Figure 4 [11, 12].
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