Power over fiber using a large core fiber and laser operating at 976 nm with 10 W power

Martínek, Petr; Prajzler, Václav

doi:10.1016/j.yofte.2023.103404

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…While research on laser power converter devices continues to progress in many groups [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37], our present study has expanded the possibilities for stable and reliable power-over-fiber or power-beaming devices that are obtained using vertical multijunction power converters. The multijunction design enables practical optimal loads and tailored output voltages.…”

Section: Discussionmentioning

confidence: 99%

67.5% Efficient InP-Based Laser Power Converters at 1470 nm at 77 K

Fafard,

Masson

2024

Photonics

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Recent developments in long wavelength and cryogenic laser power converters have unlocked record performances in both areas. Here, devices for an optical input at ~1470 nm are studied for cryogenic applications, combining these cryogenic and long-wavelength attributes. Multijunction laser power converters are demonstrated to have a high-efficiency operation at 77 K. The photovoltaic-power-converting III-V semiconductor devices are designed with InGaAs-absorbing layers, here with 10 thin subcells (PT10), connected by transparent tunnel junctions. Unprecedented conversion efficiencies of up to 67.5% are measured at liquid nitrogen temperatures with an output power of Pmpp = 1.35 W at an average optical input intensity of ~62 W/cm2. A remarkably low bandgap voltage offset value of Woc~50 mV is obtained at an average optical input intensity of ~31 W/cm2.

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Section: Discussionmentioning

confidence: 99%

67.5% Efficient InP-Based Laser Power Converters at 1470 nm at 77 K

Fafard,

Masson

2024

Photonics

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“…The ongoing developments in the field of photovoltaic (PV) devices are expected to result in further device improvements . Such advances allow emerging applications of optical wireless power transmission (OWPT) and enable new system design strategies [89][90][91][92][93][94][95][96][97][98][99][100][101]. Importantly, it has become evident in recent years that vertical multi-junction OPCs are by far the best option for obtaining high output powers and high conversion efficiencies [41,91].…”

Section: Introductionmentioning

confidence: 99%

Vertical Multi-Junction Laser Power Converters with 61% Efficiency at 30 W Output Power and with Tolerance to Beam Non-Uniformity, Partial Illumination, and Beam Displacement

Fafard,

Masson

2023

Photonics

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Stable and reliable optical power converting devices are obtained using vertical multi-junction laser power converters. They are based on the GaAs and the InP material systems and are used for power-over-fiber or power-beaming applications. This study demonstrates that, in addition to providing the overall best conversion efficiencies with output voltages ideal for various applications, these semiconductor photovoltaic devices are very tolerant to beam non-uniformity, partial illumination, or beam displacement variations. Examples are given with two tight beams, each covering as little as ~7% of the cell area. An optical input power of 10 W was converted with still an efficiency of Eff ~59.4%. For an input power of 20 W, the illuminated area was set to ~22% without significantly affecting the conversion efficiency of Eff ~60%. Remarkably, for a beam diameter at ~65% of the chip length (i.e., covering ~35% of the chip area), a converted power of 29.5 W was obtained using a 12-junction GaAs device with a conversion efficiency of 61%. For a 10 junction InP-based device, an efficiency of Eff = 51.1% was obtained at an output voltage reaching as high as Voc = 5.954 V for an average optical intensity of 69 W/cm2 and an illumination area of ~57%.

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Power over fiber using a multimode optical power with a core diameter of 50 µm

Prajzler,

Zikmund

2024

Opt Quant Electron

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We report on the properties of the Power over Fiber (PoF) transmission link using a High-Power Laser Source operating at 976 nm and using three types of optical fiber with a core diameter of 50 µm. Two step-index profile multimode optical fibers and one fiber with a gradient index were used for optical power transmission. Optical light was converted to electricity using commercially available Photovoltaic Power Convertors (PPCs) with a maximal optical input power of 1.5 W and experimental PPCs with a maximal optical input power of 4.0 W. We experimentally proved optical power transmission up to a distance of 300 m. In the case of the commercially available working PPC and using the gradient index fiber we achieved a result of 0.534 W of electrical power and using the experimental PPC we achieved 0.645 W. In the case of the step-index optical fiber, the result was 1.3 W.

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Power over fiber using a large core fiber and laser operating at 976 nm with 10 W power

Cited by 6 publications

References 9 publications

67.5% Efficient InP-Based Laser Power Converters at 1470 nm at 77 K

67.5% Efficient InP-Based Laser Power Converters at 1470 nm at 77 K

Vertical Multi-Junction Laser Power Converters with 61% Efficiency at 30 W Output Power and with Tolerance to Beam Non-Uniformity, Partial Illumination, and Beam Displacement

Power over fiber using a multimode optical power with a core diameter of 50 µm

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