Hybrid Self-Protected Fiber-FSO WDM-PON System with Fiber Breakage Prevention

Ching-Hsuan Hsu; Syu-Yang Jiang; Shang-En Hsieh; Chien-Hung Yeh; Yu-Ting Lai; Lan-Yin Chen; Shien-Kuei Liaw; Chi-Wai Chow

doi:10.3390/photonics9110822

Photonics (Nov 2022)

Hybrid Self-Protected Fiber-FSO WDM-PON System with Fiber Breakage Prevention

Ching-Hsuan Hsu,
Syu-Yang Jiang,
Shang-En Hsieh,
Chien-Hung Yeh,
Yu-Ting Lai,
Lan-Yin Chen,
Shien-Kuei Liaw,
Chi-Wai Chow

Affiliations

Ching-Hsuan Hsu: Department of Photonics, Feng Chia University, Taichung 407802, Taiwan
Syu-Yang Jiang: Department of Photonics, Feng Chia University, Taichung 407802, Taiwan
Shang-En Hsieh: Department of Photonics, Feng Chia University, Taichung 407802, Taiwan
Chien-Hung Yeh: Department of Photonics, Feng Chia University, Taichung 407802, Taiwan
Yu-Ting Lai: Department of Photonics, Feng Chia University, Taichung 407802, Taiwan
Lan-Yin Chen: Department of Photonics, Feng Chia University, Taichung 407802, Taiwan
Shien-Kuei Liaw: Department of Electronics and Computer Engineering, National Taiwan University of Science and Technology, Taipei 106335, Taiwan
Chi-Wai Chow: Department of Photonics, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan

DOI: https://doi.org/10.3390/photonics9110822
Journal volume & issue: Vol. 9, no. 11
p. 822

Abstract

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In this research, we present and design a blended wavelength-division-multiplexing passive optical network (WDM-PON) architecture to deliver both baseband and free-space optical (FSO) signals by using two wavelength bands over an available bandwidth to avoid the signal interference. Only using few additional components in the optical line termination (OLT) and optical network unit (ONU)/optical wireless unit (OWU) can achieve self-protected operation in the presented hybrid fiber-FSO access network against fiber breakage. In the measurement, eight WDM wavelengths with 24.3 Gbit/s on-off keying (OOK) modulation format are applied to verify and discuss the bit error rate (BER) performances of baseband and FSO signals, respectively, through 25 km fiber and 2 m wireless FSO connections. Therefore, the presented PON not only can deliver both baseband and FSO traffics, but can also provide a self-restored mechanism against fiber fault.

Published in Photonics

ISSN: 2304-6732 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: http://www.mdpi.com/journal/photonics

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