Super narrow beam shaping system for remote power supply at long atmospheric path

Matsak, I. S.; Kapranov, V. V.; Tugaenko, V. Yu.; Sergeev, E. S.; Babanin, E. A.; Suhareva, N. A.

doi:10.1117/12.2250752

Cited by 8 publications

(1 citation statement)

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“…11) Wireless power supply including laser power beaming to moving electric vehicles equipped with PV cells is attracting considerable attention, as well as low and short-distance power supply to IoT devices. [12][13][14] In particular, a laser-powered flying drone has been demonstrated using high-power (∼kW) laser diodes (LDs). 15) When solar energy is utilized for these purposes using the combination of solar cells and LDs, the total solarto-laser conversion efficiency equals the product of the solarto-electricity conversion efficiency of solar cells and the electricity-to-laser conversion efficiency of LDs.…”

Section: Introductionmentioning

confidence: 99%

Crystalline silicon photovoltaic cells used for power transmission from solar-pumped lasers: I. Light trapping concepts

Takeda

Ito

Yamada

et al. 2018

Jpn. J. Appl. Phys.

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We have proposed a light trapping concept for crystalline silicon photovoltaic (PV) cells used for power transmission from solar-pumped lasers (SPLs) emitting at 1064 nm. The underlying mechanism is multiple reflection between a multilayered angle-selective filter on the front surface and a diffuse reflector on the rear surface of the cell. For the stationary use and optical fiber connection of the SPL-PV combination in which the incident angles of the laser light to the PV cells (ϕ) change within 5-10°, double-cavity bandpass filters realize the required angle selection function. When the SPLs illuminate moving electric vehicles equipped with the PV cells at larger ϕ values, shortpass filters are appropriate. These specially designed angle-selective filters provide significant light trapping performance and consequently absorbances higher than the Yablonovitch limit up to ϕ = 45°. The fact that the present light trapping configuration requires no microfabrication processes is also a great advantage over two-and three-dimensional photonic crystal structures.

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