Multi-Channel Long-Distance Audio Transmission System Using Power-over-Fiber Technology

To establish stable communication networks in harsh environments where power supply is difficult, such as coal mines and underwater, we propose an effective scheme for co-transmission of analog audio signals and energy. By leveraging the advantages of optical fibers, such as corrosion resistance and...

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Bibliographic Details
Published in:Photonics 2023-05, Vol.10 (5), p.521
Main Authors: Guo, Can, Guan, Chenggang, Lv, Hui, Chai, Shiyi, Chen, Hao
Format: Article
Language:English
Subjects:
acoustic overload point (AOP)
Acoustics
analog audio signals
Audio signals
Coal industry
Coal mines
Communication networks
Communications systems
Computer networks
Corrosion resistance
Efficiency
Electric power
Electric power transmission
Electricity distribution
Electromagnetic interference
Electromagnetism
Fiber optics
Fiber technology
Harsh environments
Information transfer
Laser beams
Lasers
Mines
mobile communication networks
Optical fibers
Photovoltaics
Power converters
Power supply
power-over-fiber (PoF)
Receivers & amplifiers
Signal to noise ratio
signal-to-noise ratio (SNR)
Technology utilization
Terminals
Transmitters
Wave division multiplexing
Wavelength division multiplexing
wavelength division multiplexing (WDM)
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Summary:To establish stable communication networks in harsh environments where power supply is difficult, such as coal mines and underwater, we propose an effective scheme for co-transmission of analog audio signals and energy. By leveraging the advantages of optical fibers, such as corrosion resistance and strong resistance to electromagnetic interference, the scheme uses a 1550 nm laser beam as the carrier for analog audio signal propagation, which is then converted to electrical energy through a custom InGaAs/InP photovoltaic power converter (PPC) for energy supply and information transfer without an external power supply after a 25 km fiber transmission. In the experiment, with 160 mW of optical power injection, the scheme not only provides 4 mW of electrical power, but also transmits an analog signal with an acoustic overload point (AOP) of 105 dBSPL and a signal-to-noise ratio (SNR) of 50 dB. In addition, the system employs wavelength division multiplexing (WDM) technology to transform from single-channel to multi-channel communication on a single independent fiber, enabling the arraying of receiving terminals. The passive arrayed terminals make the multi-channel long-distance audio transmission system using power-over-fiber (PoF) technology a superior choice for establishing a stable communication network in harsh environments.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics10050521