On the design of an optical wireless link for small cell backhaul communication and energy harvesting

Fakidis, John; Ijaz, Muhammad; Kučera, Štěpán; Claußen, Holger; Haas, Harald

doi:10.1109/pimrc.2014.7136132

Cited by 11 publications

(19 citation statements)

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“…2) Experiment I -Objective, Method, Setup and Applied Analytical Model: The objective of Study I, to increase the experimental energy efficiency of the 5 m OW link created in [8] and [9], is undertaken in this experiment. The system block diagram created for WPT is shown in Fig.…”

Section: Experimental System and Resultsmentioning

confidence: 99%

“…The exclusive indoor application of OWPT was studied in [8] and [9]. In these studies, ambient light was ensured to be negligible and therefore the concept of OWPT to SCs was investigated for dark conditions.…”

Section: B Optical Wireless Power Transfer and Energy Harvesting Fromentioning

confidence: 99%

“…In these studies, ambient light was ensured to be negligible and therefore the concept of OWPT to SCs was investigated for dark conditions. In [8], an OW link was created by the use of a high brightness white LED (WLED), a large parabolic mirror for light collimation and an a-Si solar panel placed at 5 m. The maximum measured link efficiency and harvested power were only 0.1% and 18.3 mW, respectively. This fact was attributed to significant geometrical optical losses and very low energy efficiency of the a-Si technology of the panel.…”

Section: B Optical Wireless Power Transfer and Energy Harvesting Fromentioning

confidence: 99%

“…The objective of Study I is to increase the experimental energy efficiency of the 5 m OW link created in [8] and [9]. This is achieved by a decrease in the dimensions, number of cells and a different technology use of the solar receiver in [8] and [9]. An increased maximum link efficiency reduces the number of optical transmitters (i.e.…”

Section: A Objectivementioning

confidence: 99%

“…1) Study I -Total Link and Components Efficiency: The implemented OWPT links operate at a distance of 5.2 m in order to compare metrics of electrical performance (such as total power efficiency and harvested power) with the respective parameters measured in [8]- [10]. A solar panel and a single solar cell are used in the experiments.…”

Section: Introductionmentioning

confidence: 99%

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Indoor Optical Wireless Power Transfer to Small Cells at Nighttime

Fakidis

Videv

Kučera

et al. 2016

J. Lightwave Technol.

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The application of wireless backhaul communication and power transfer to outdoor small cells (SCs) could significantly decrease their installation cost. In this paper, the concept of indoor optical wireless power transfer (OWPT) to SCs is investigated in the absence of ambient light, i.e. during darkness hours. An experimental study is conducted by the use of up to 4 red laser diodes (LDs), a crystalline silicon (c-Si) solar panel and cell placed at 5.2 m. A value of 69% is measured for the fill factor (FF) of the solar panel. Also, a total power efficiency of 3.2% is measured for an optical wireless (OW) link with an average efficiency of 2 LDs of 26.8%, a solar cell efficiency of 13.3% and only 10.6% of geometrical losses. A comparison of this link with a state-of-the-art inductive power transfer system (IPTS) shows an improvement of the total link efficiency by 2.7 times. Another OW link is implemented with a divergence of full width at 36.8% of the peak intensity of 3 mrad and 5.75 mrad along the small and large axes of the beam, respectively. The experimental levels of harvested power are in the order of mW, whereas approximately 1 W is required for the operation of a SC. Therefore, a 42 laserbased transmitter is designed both analytically and by the use of the simulation tool Zemax. The respective results show the feasibility of delivering 7.2 W of optical power to a solar cell of up to 30 m distance with geometrical losses of only 2%, but a beam enclosure is also required due to eye safety restrictions.Index Terms-Small cells (SCs), optical wireless power transfer (OWPT), energy harvesting (EH), radio frequency (RF), rectennas, diode lasers, quantum well lasers, laser beams, solar energy, energy efficiency.

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Section: Experimental System and Resultsmentioning

confidence: 99%

Section: B Optical Wireless Power Transfer and Energy Harvesting Fromentioning

confidence: 99%

Section: B Optical Wireless Power Transfer and Energy Harvesting Fromentioning

confidence: 99%