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Home 2021

Analysis of CSRZ and CSNRZ Coding for DQPSK and OQPSK Transmitter Configurations for Optical Microwave Generation Signals Based on Stimulated Brillouin Scattering

Authors: H. C. Cherutoi, D. W. Waswa, K. M. Muguro, D. K. Choge, 152 (2021) 27-38

2024-01-10
Reading Time: 3 mins read
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ABSTRACT

The use of Carrier Suppressed Non-Return to Zero (CSNRZ) and Carrier Suppressed Return to Zero (CSRZ) modulation formats in Dense Wavelength Division Multiplexing (DWDM) channels at 1 Gb/s and 10 Gb/s is investigated. The results of simulated analysis using Differential Quadrature Phase Shift Keying (DQPSK) and Offset Quadrature Phase Shift Keying (OQPSK) formats are presented. We demonstrate that Stimulated Brillouin Scatteriring (SBS) is a major contribution of the back-scattering signal. At bit rate of 1 Gb/s and 10 Gb/s, CSRZ-OQPSK modulation format has a low threshold for SBS signal generation. For a data rate of 1 Gb/s, high SBS threshold of 19.76 dBm for CSRZ-DQPSK is recorded. The results can be used to suppress SBS in high power lasers which could be useful in high bit rate signal transmission.

 

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Tags: Carrier Suppressed Non-Return to ZeroCarrier Suppressed Return to ZeroDense Wavelength Division MultiplexingDifferential Quadrature Phase Shift KeyingOffset Quadrature Phase Shift KeyingStimulated Brillouin Scatteriring
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