Hybrid of Free Space Optics Communication and Sensor System Using IWDM Technique

Hayle, Stotaw Talbachew; Manie, Yibeltal Chanie; Yao, Cheng-Kai; Yeh, Tsung-Yuan; Yu, Cheng-Hung

doi:10.1109/jlt.2022.3186895

Cited by 17 publications

(3 citation statements)

References 27 publications

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“…Link availability degradation due to fog can be minimized by using mid-IR (10.6 µm) signal [16]. Hybrid RF/FSO link can solve the system degradation due to dense fog and pointing errors [17]- [19]. Array of receivers could provide the better solution to the challenges due to atmospheric effects [20].…”

Section: Introductionmentioning

confidence: 99%

Free space optical communication system in the presence of atmospheric losses

V. Belgaonkar,

Ramakrishnan

2024

IJEECS

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<span>Free space optical communication is gaining importance in the field of optical communication due to its high speed and high bandwidth applications. Free space optical communication system (FSOCS) provides many benefits as compared to traditional wireless communication system and fiber optic cables. This makes this technology the reasonable extension of metropolitan area network and also provides the quick recovery during natural disaster. This system performance is limited due to the atmospheric turbulence effect and various atmospheric losses such as rain, and fog. Gamma gamma atmospheric turbulent model is used to analyze the system performance in the presence of moderate to strong atmospheric turbulence. We have designed the FSO gamma <span>gamma turbulent model with non-return to zero (NRZ) modulation format employing wavelength division multiplexing (WDM), spatial diversity multiple input multiple output (MIMO) (8×8) at various atmospheric turbulence levels and attenuation loss of 10 dB/km at the distance of 2-4 km. Using the proposed model, the link distance is enhanced up to 4km in the presence of turbulence and atmospheric losses with minimum laser transmitted power.</span></span>

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Section: Introductionmentioning

confidence: 99%

Free space optical communication system in the presence of atmospheric losses

V. Belgaonkar,

Ramakrishnan

2024

IJEECS

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“…The FSO communication can be used as fault protection backhauling to the existing optical fiber communication system, therefore improving the overall network performance by reducing the network downtime [1]. Moreover, FSO transmission channels can be used to provide rapid connectivity to the geographical constrained areas for sensor network applications [2]. The propagating optical wavelength undergoes effects like scattering and absorption in random atmospheric weather conditions such as fog, rain, snow, and dust.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Turbulence and Fog Attenuation Effects in Controlled Environment FSO Communication Links

Khan

Saeed

Naeem

et al. 2022

IEEE Photon. Technol. Lett.

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Free-space optical (FSO) communication can be seen as a promising technology for point-to-point and back-hauling links in the next generation wireless networks (5G and beyond) where cell size may shrink to a few hundred meters. In this work, we have experimentally investigated the laser beam propagation for FSO link under atmospheric turbulence and fog conditions. A controlled atmospheric environment chamber is designed to perform experiments under varying channel conditions. For fog attenuation, we have proposed an empirical model as a function of visibility against the measured average values, for visibility range of 0≤V ≤1000 m. For atmospheric turbulence, we report the measured values of the refractive index structure parameter C 2 n . The measured C 2 n is used to calculate the atmospheric coherence width along the propagation distance. This work would help in the design optimization of practical FSO links under adverse conditions like fog and atmospheric turbulence.

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“…Roughly all aspects of communication technology nowadays have undergone a revolution with the introduction of fiber-optic transmission. In recent years, numerous studies have been conducted based on optical fiber sensors for a variety of purposes, including the measurement of strain and temperature [1][2][3][4], vibration [5], electric current [6], pressure [7], and liquid level [8]. Among the variety of fiber optic sensors, the fiber Bragg grating (FBG)-based sensors have advantages due to their ability to perform the basic functions of reflection, dispersion, and filtering that are commonly used in sensing applications.…”

Section: Introductionmentioning

confidence: 99%

Utilizing a Tunable Delay Line Interferometer to Improve the Sensing Accuracy of an FBG Sensor System

et al. 2022

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This paper proposes a novel sensing system based on a tunable delay line interferometer. The tunable delay line interferometer has been used to interpret strain, bringing us high accuracy as well as tunability. The shifted wavelength of the fiber Bragg grating (FBG) sensor caused by the applied strain can be visualized by an optical power meter (OPM) instead of an optical spectrum analyzer (OSA) by converting it to a power change using a tunable delay line interferometer (TDI). Different free spectral ranges (FSRs) are assigned to the TDI to investigate the accuracy and operation range of the proposed system. Thus, we achieve high accuracy and sensitivity by adjusting the FSR to 0.47 nm. Experimental results show that the maximum output power variation corresponding to a strain of 10 με is about 0.9 dB when the FSR is set to 0.47 nm. The proposed system is also cost-effective regarding the equipment utilized for interrogation: a tunable delay line interferometer and an optical power meter.

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Hybrid of Free Space Optics Communication and Sensor System Using IWDM Technique

Cited by 17 publications

References 27 publications

Free space optical communication system in the presence of atmospheric losses

Free space optical communication system in the presence of atmospheric losses

Atmospheric Turbulence and Fog Attenuation Effects in Controlled Environment FSO Communication Links

Utilizing a Tunable Delay Line Interferometer to Improve the Sensing Accuracy of an FBG Sensor System

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