Wavelength Division Multiplexing Network over Polymer Optical Fiber Using Fabricated Couplers for Informatics Communications

Sulaiman, Malik; Arsad, Norhana; Ramza, Harry; Harun, Mohd Hazwan; Guna, Hadi; Nasimi, Farshad; Ab-Rahman, Mohammad Syuhaimi

doi:10.1016/j.protcy.2013.12.315

Cited by 4 publications

(1 citation statement)

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“…In this paper, a high SNR Φ-OTDR system based on wavelength diversity and differential vector aggregation method is proposed. In the field of optical communication, wavelength division multiplexing (WDM) has been proved to be an effective solution to the problem of frequency bandwidth limitation, which can greatly increase the channel capacity without sacrificing the existing frequency bandwidth [21]. That is, wavelength diversity and aggregation scheme may be used in Φ-OTDR, and can be further cascaded with frequency diversity, which has the potential to increase the diversity scale substantially.…”

Section: Introductionmentioning

confidence: 99%

High SNR Φ-OTDR Based on Frequency and Wavelength Diversity With Differential Vector Aggregation Method

Lü

Yang

et al. 2020

IEEE Photonics J.

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Phase-demodulated phase-sensitive time domain reflectometer (Φ-OTDR) has attracted much attention because of its linear relationship between the phase variation and the amplitude of the vibration. However, it suffers from limited signal-to-noise ratio (SNR) and signal fading, due to the inherent low Rayleigh scattering coefficient and randomly spatial non-uniform distribution of the refractive index. Here, a Φ-OTDR system based on wavelength diversity is demonstrated, which can enhance the SNR and reduce signal fading simultaneously by using differential vector aggregation method. A theoretical model is built, and the linear relationship between SNR improvement and diversity scale is analyzed. The verification experiment is conducted, and in the further experiments, the frequency and wavelength diversity technology are cascaded to achieve a diversity scale of 20. After differential vector aggregation method, the external disturbance signal is well reconstructed and the noise floor is reduced by 13.4dB, which is basically consistent with the theoretical analysis.

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Section: Introductionmentioning

confidence: 99%