Power over Fibre: Material Properties of Homojunction Photovoltaic Micro-Cells

Allwood, Gary; Wild, Graham; Hinckley, Steven

doi:10.1109/delta.2011.66

Cited by 15 publications

(12 citation statements)

References 4 publications

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“…The results show an unusual trend when the input optical power exceeds 20mW. Furthermore, we can see that the open circuit voltage is approximately 0.35V, comparable to 0.45V as shown in previous simulations [4]. Figure 7 shows the optical to electrical power conversion efficiency as a function of input optical power for a germanium photodiode illuminated by 980nm light.…”

Section: Multiplexingsupporting

confidence: 75%

“…In addition, we can see the open circuit voltage is just over 0.6V which is approximately what we would expect from a silicon device. Previous simulations have shown the open circuit voltage to be 0.78V [4]. Figure 6 shows the power-voltage curves for an off-the-shelf germanium photodiode when illuminated by 980nm light of various optical powers.…”

Section: Multiplexingmentioning

confidence: 97%

“…Terrestrial solar cell development for high power applications using silicon-based cells has also indicated high efficiencies for these types of structures under monochromatic illumination [3]. Moreover, research on simple germanium based PPCs has suggested optical to electrical power conversion efficiencies as high as 30.4% and 36.4% when illuminated by 1310nm and 1550nm light, respectively, are possible [4].…”

Section: Introductionmentioning

confidence: 98%

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A comparison of silicon and germanium photovoltaic power converters for power over fibre

2011

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In this study, we compare the practical implementation of both silicon and germanium Photovoltaic Power Converters (PPCs). Simulations have previously shown that silicon PPCs can produce up to 43% optical to electrical power conversion and germanium PPCs can produce conversion efficiencies as high as 22% when illuminated by 980nm light. Moreover, germanium can produce conversion efficiencies of up to 36% when illuminated by 1550nm light. Here, we compare these results to real power conversion efficiencies of off-the-shelf silicon and germanium photodiodes, producing 9.9% and 8.0% conversion efficiencies, respectively for 980nm. Furthermore, we show germanium produces conversion efficiencies up to 14.6% under illumination of 1550nm light. A discussion of the limitations is made. The results show there is a peak efficiency point corresponding to a specific input optical power. We also show that the power over fibre signal can be successfully combined with communications signals, using wavelength division multiplexing, and that the multiplexed signals can be separated without significant loss of signal, or power conversion efficiency. In addition, we investigate the affects of free space problems, such as divergence and misalignment, in both the lateral and longitudinal directions. As expected, optical alignment plays a significant role in producing maximum power conversion.

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Section: Multiplexingsupporting

confidence: 75%

Section: Multiplexingmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

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A comparison of silicon and germanium photovoltaic power converters for power over fibre

2011

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“…It is stated that the proposed system would need an opto-pneumatic or opto-electric converter to provide actuation. The actuation could then be performed by a technique based on Hockaday and Waters system [121] or by using a photovoltaic power converter [123]. Photovoltaic power converters (PPCs) are essentially miniature solar cells designed to be responsive to specific wavelengths and connected directly to an optical fiber.…”

Section: Optical Actuation and All Optical Control Systemsmentioning

confidence: 99%

“…GaAs photovoltaic power converters have conversion efficiencies as high as 55% [124] and can produce up to 0.5 W of electrical power. Although only GaAs based PPCs are commercially manufactured, research has shown that both Silicon and Germanium PPCs could be a viable solution for longer wavelength power conversion, having optical to electrical power conversion efficiencies as high as 50% [123]. Furthermore, it has been demonstrated that communication, sensing and power signals can be simultaneously sent over the same fiber without any interference or loss of signal strengths [125].…”

Section: Optical Actuation and All Optical Control Systemsmentioning

confidence: 99%

Fiber Bragg Grating Sensors for Mainstream Industrial Processes

2017

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This paper reviews fiber Bragg grating sensing technology with respect to its use in mainstream industrial process applications. A review of the various types of sensors that have been developed for industries such as power generation, water treatment and services, mining, and the oil and gas sector has been performed. A market overview is reported as well as a discussion of some of the factors limiting their penetration into these markets. Furthermore, the author's make recommendations for future work that would potentially provide significant opportunity for the advancement of fiber Bragg grating sensor networks in these mainstream industries.

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